path: root/FreeRTOS/Demo/Common/drivers/ST/STM32F10xFWLib/src/stm32fxxx_eth.c

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : stm32fxxx_eth.c
* Author             : MCD Application Team
* Version            : V1.0.0
* Date               : 12/17/2008
* Updates            : 05/2009 Driver optimization.
*                      - No copy. DMA directly uses Stack packets.
* Desciption        : This file provides all the ETHERNET firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

/* For the delays. */
#include "FreeRTOS.h"
#include "task.h"

/* Includes ------------------------------------------------------------------*/
#include "stm32fxxx_eth.h"
#include "stm32f10x_rcc.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Global pointers on Tx and Rx descriptor used to track transmit and receive descriptors */
ETH_DMADESCTypeDef  *DMATxDescToSet;
ETH_DMADESCTypeDef  *DMARxDescToGet;

ETH_DMADESCTypeDef  *DMAPTPTxDescToSet;
ETH_DMADESCTypeDef  *DMAPTPRxDescToGet;

/* ETHERNET MAC address offsets */
#define ETH_MAC_AddrHighBase   (ETH_MAC_BASE + 0x40)  /* ETHERNET MAC address high offset */
#define ETH_MAC_AddrLowBase    (ETH_MAC_BASE + 0x44)  /* ETHERNET MAC address low offset */

/* ETHERNET MACMIIAR register Mask */
#define MACMIIAR_CR_Mask    ((u32)0xFFFFFFE3)
/* ETHERNET MACCR register Mask */
#define MACCR_CLEAR_Mask    ((u32)0xFF20810F)
/* ETHERNET MACFCR register Mask */
#define MACFCR_CLEAR_Mask   ((u32)0x0000FF41)
/* ETHERNET DMAOMR register Mask */
#define DMAOMR_CLEAR_Mask   ((u32)0xF8DE3F23)

/* ETHERNET Remote Wake-up frame register length */
#define ETH_WakeupRegisterLength      8

/* ETHERNET Missed frames counter Shift */
#define  ETH_DMA_RxOverflowMissedFramesCounterShift     17

/* ETHERNET DMA Tx descriptors Collision Count Shift */
#define  ETH_DMATxDesc_CollisionCountShift        3
/* ETHERNET DMA Tx descriptors Buffer2 Size Shift */
#define  ETH_DMATxDesc_BufferSize2Shift           16
/* ETHERNET DMA Rx descriptors Frame Length Shift */
#define  ETH_DMARxDesc_FrameLengthShift           16
/* ETHERNET DMA Rx descriptors Buffer2 Size Shift */
#define  ETH_DMARxDesc_Buffer2SizeShift           16

/* ETHERNET errors */
#define  ETH_ERROR              ((u32)0)
#define  ETH_SUCCESS            ((u32)1)

#define ethFIVE_SECONDS			( 5000 / portTICK_PERIOD_MS )
#define ethHUNDRED_MS			( 100 / portTICK_PERIOD_MS )

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : ETH_DeInit
* Desciption     : Deinitializes the ETHERNET peripheral registers to their
*                  default reset values.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DeInit(void)
{
//  RCC_AHBPeriphResetCmd(RCC_AHBPeriph_ETH_MAC, ENABLE);
//  RCC_AHBPeriphResetCmd(RCC_AHBPeriph_ETH_MAC, DISABLE);
}

/*******************************************************************************
* Function Name  : ETH_Init
* Desciption     : Initializes the ETHERNET peripheral according to the specified
*                  parameters in the ETH_InitStruct .
* Input          : - ETH_InitStruct: pointer to a ETH_InitTypeDef structure
*                    that contains the configuration information for the
*                    specified ETHERNET peripheral.
* Output         : None
* Return         : None
*******************************************************************************/
u32 ETH_Init(ETH_InitTypeDef* ETH_InitStruct, u16 PHYAddress)
{
  u32 RegValue = 0, tmpreg = 0;
  RCC_ClocksTypeDef  rcc_clocks;
  u32 hclk = 60000000;
  u32 timeout = 0;

  /* Check the parameters */
  /* MAC --------------------------*/
  eth_assert_param(IS_ETH_AUTONEGOTIATION(ETH_InitStruct->ETH_AutoNegotiation));
  eth_assert_param(IS_ETH_WATCHDOG(ETH_InitStruct->ETH_Watchdog));
  eth_assert_param(IS_ETH_JABBER(ETH_InitStruct->ETH_Jabber));
  eth_assert_param(IS_ETH_JUMBO_FRAME(ETH_InitStruct->ETH_JumboFrame));
  eth_assert_param(IS_ETH_INTER_FRAME_GAP(ETH_InitStruct->ETH_InterFrameGap));
  eth_assert_param(IS_ETH_CARRIER_SENSE(ETH_InitStruct->ETH_CarrierSense));
  eth_assert_param(IS_ETH_SPEED(ETH_InitStruct->ETH_Speed));
  eth_assert_param(IS_ETH_RECEIVE_OWN(ETH_InitStruct->ETH_ReceiveOwn));
  eth_assert_param(IS_ETH_LOOPBACK_MODE(ETH_InitStruct->ETH_LoopbackMode));
  eth_assert_param(IS_ETH_DUPLEX_MODE(ETH_InitStruct->ETH_Mode));
  eth_assert_param(IS_ETH_CHECKSUM_OFFLOAD(ETH_InitStruct->ETH_ChecksumOffload));
  eth_assert_param(IS_ETH_RETRY_TRANSMISSION(ETH_InitStruct->ETH_RetryTransmission));
  eth_assert_param(IS_ETH_AUTOMATIC_PADCRC_STRIP(ETH_InitStruct->ETH_AutomaticPadCRCStrip));
  eth_assert_param(IS_ETH_BACKOFF_LIMIT(ETH_InitStruct->ETH_BackOffLimit));
  eth_assert_param(IS_ETH_DEFERRAL_CHECK(ETH_InitStruct->ETH_DeferralCheck));
  eth_assert_param(IS_ETH_RECEIVE_ALL(ETH_InitStruct->ETH_ReceiveAll));
  eth_assert_param(IS_ETH_SOURCE_ADDR_FILTER(ETH_InitStruct->ETH_SourceAddrFilter));
  eth_assert_param(IS_ETH_CONTROL_FRAMES(ETH_InitStruct->ETH_PassControlFrames));
  eth_assert_param(IS_ETH_BROADCAST_FRAMES_RECEPTION(ETH_InitStruct->ETH_BroadcastFramesReception));
  eth_assert_param(IS_ETH_DESTINATION_ADDR_FILTER(ETH_InitStruct->ETH_DestinationAddrFilter));
  eth_assert_param(IS_ETH_PROMISCUOUS_MODE(ETH_InitStruct->ETH_PromiscuousMode));
  eth_assert_param(IS_ETH_MULTICAST_FRAMES_FILTER(ETH_InitStruct->ETH_MulticastFramesFilter));
  eth_assert_param(IS_ETH_UNICAST_FRAMES_FILTER(ETH_InitStruct->ETH_UnicastFramesFilter));
  eth_assert_param(IS_ETH_PAUSE_TIME(ETH_InitStruct->ETH_PauseTime));
  eth_assert_param(IS_ETH_ZEROQUANTA_PAUSE(ETH_InitStruct->ETH_ZeroQuantaPause));
  eth_assert_param(IS_ETH_PAUSE_LOW_THRESHOLD(ETH_InitStruct->ETH_PauseLowThreshold));
  eth_assert_param(IS_ETH_UNICAST_PAUSE_FRAME_DETECT(ETH_InitStruct->ETH_UnicastPauseFrameDetect));
  eth_assert_param(IS_ETH_RECEIVE_FLOWCONTROL(ETH_InitStruct->ETH_ReceiveFlowControl));
  eth_assert_param(IS_ETH_TRANSMIT_FLOWCONTROL(ETH_InitStruct->ETH_TransmitFlowControl));
  eth_assert_param(IS_ETH_VLAN_TAG_COMPARISON(ETH_InitStruct->ETH_VLANTagComparison));
  eth_assert_param(IS_ETH_VLAN_TAG_IDENTIFIER(ETH_InitStruct->ETH_VLANTagIdentifier));
  /* DMA --------------------------*/
  eth_assert_param(IS_ETH_DROP_TCPIP_CHECKSUM_FRAME(ETH_InitStruct->ETH_DropTCPIPChecksumErrorFrame));
  eth_assert_param(IS_ETH_RECEIVE_STORE_FORWARD(ETH_InitStruct->ETH_ReceiveStoreForward));
  eth_assert_param(IS_ETH_FLUSH_RECEIVE_FRAME(ETH_InitStruct->ETH_FlushReceivedFrame));
  eth_assert_param(IS_ETH_TRANSMIT_STORE_FORWARD(ETH_InitStruct->ETH_TransmitStoreForward));
  eth_assert_param(IS_ETH_TRANSMIT_THRESHOLD_CONTROL(ETH_InitStruct->ETH_TransmitThresholdControl));
  eth_assert_param(IS_ETH_FORWARD_ERROR_FRAMES(ETH_InitStruct->ETH_ForwardErrorFrames));
  eth_assert_param(IS_ETH_FORWARD_UNDERSIZED_GOOD_FRAMES(ETH_InitStruct->ETH_ForwardUndersizedGoodFrames));
  eth_assert_param(IS_ETH_RECEIVE_THRESHOLD_CONTROL(ETH_InitStruct->ETH_ReceiveThresholdControl));
  eth_assert_param(IS_ETH_SECOND_FRAME_OPERATE(ETH_InitStruct->ETH_SecondFrameOperate));
  eth_assert_param(IS_ETH_ADDRESS_ALIGNED_BEATS(ETH_InitStruct->ETH_AddressAlignedBeats));
  eth_assert_param(IS_ETH_FIXED_BURST(ETH_InitStruct->ETH_FixedBurst));
  eth_assert_param(IS_ETH_RXDMA_BURST_LENGTH(ETH_InitStruct->ETH_RxDMABurstLength));
  eth_assert_param(IS_ETH_TXDMA_BURST_LENGTH(ETH_InitStruct->ETH_TxDMABurstLength));
  eth_assert_param(IS_ETH_DMA_DESC_SKIP_LENGTH(ETH_InitStruct->ETH_DescriptorSkipLength));
  eth_assert_param(IS_ETH_DMA_ARBITRATION_ROUNDROBIN_RXTX(ETH_InitStruct->ETH_DMAArbitration));

/*--------------------------------- MAC Config -------------------------------*/
/*----------------------- ETHERNET MACMIIAR Configuration --------------------*/
  /* Get the ETHERNET MACMIIAR value */
  tmpreg = ETH_MAC->MACMIIAR;
  /* Clear CSR Clock Range CR[2:0] bits */
  tmpreg &= MACMIIAR_CR_Mask;
  /* Get hclk frequency value */
  RCC_GetClocksFreq(&rcc_clocks);
  hclk = rcc_clocks.HCLK_Frequency;

  /* Set CR bits depending on hclk value */
  if((hclk >= 20000000)&&(hclk < 35000000))
  {
    /* CSR Clock Range between 20-35 MHz */
    tmpreg |= (u32)ETH_MACMIIAR_CR_Div16;
  }
  else if((hclk >= 35000000)&&(hclk < 60000000))
  {
    /* CSR Clock Range between 35-60 MHz */
    tmpreg |= (u32)ETH_MACMIIAR_CR_Div26;
  }
  else /* ((hclk >= 60000000)&&(hclk <= 72000000)) */
  {
    /* CSR Clock Range between 60-72 MHz */
    tmpreg |= (u32)ETH_MACMIIAR_CR_Div42;
  }
  /* Write to ETHERNET MAC MIIAR: Configure the ETHERNET CSR Clock Range */
  ETH_MAC->MACMIIAR = (u32)tmpreg;

/*--------------------- PHY initialization and configuration -----------------*/
  /* Put the PHY in reset mode */
  if(!(ETH_WritePHYRegister(PHYAddress, PHY_BCR, PHY_Reset)))
  {
    /* Return ERROR in case of write timeout */
    return ETH_ERROR;
  }

  /* Delay to assure PHY reset */
  vTaskDelay( 250 / portTICK_PERIOD_MS );

  if(ETH_InitStruct->ETH_AutoNegotiation != ETH_AutoNegotiation_Disable)
  {
    /* We wait for linked satus... */
	timeout = 0;
    do
    {
      /* Wait 100ms before checking for a link again. */
      vTaskDelay( ethHUNDRED_MS );
	  timeout++;

	  /* Don't wait any longer than 5 seconds. */
    } while (!(ETH_ReadPHYRegister(PHYAddress, PHY_BSR) & PHY_Linked_Status) && (timeout < ( ethFIVE_SECONDS / ethHUNDRED_MS ) ) );

    /* Return ERROR in case of timeout */
    if(timeout == ( ethFIVE_SECONDS / ethHUNDRED_MS ))
    {
      return ETH_ERROR;
    }

    /* Enable Auto-Negotiation */
    if(!(ETH_WritePHYRegister(PHYAddress, PHY_BCR, PHY_AutoNegotiation)))
    {
      /* Return ERROR in case of write timeout */
      return ETH_ERROR;
    }

    /* Reset Timeout counter */
    timeout = 0;

    /* Wait until the autonegotiation will be completed */
    do
    {
      /* Wait 100ms before checking for negotiation to complete. */
      vTaskDelay( ethHUNDRED_MS );
	  timeout++;

	  /* Don't wait longer than 5 seconds. */
    } while (!(ETH_ReadPHYRegister(PHYAddress, PHY_BSR) & PHY_AutoNego_Complete) && (timeout < ( ethFIVE_SECONDS / ethHUNDRED_MS ) ) );

    /* Return ERROR in case of timeout */
    if(timeout == ( ethFIVE_SECONDS / ethHUNDRED_MS ))
    {
      return ETH_ERROR;
    }

    /* Reset Timeout counter */
    timeout = 0;

    /* Read the result of the autonegotiation */
    RegValue = ETH_ReadPHYRegister(PHYAddress, PHY_SR);

    /* Configure the MAC with the Duplex Mode fixed by the autonegotiation process */
    if((RegValue & PHY_Duplex_Status) != (u32)RESET)
    {
      /* Set Ethernet duplex mode to FullDuplex following the autonegotiation */
      ETH_InitStruct->ETH_Mode = ETH_Mode_FullDuplex;

    }
    else
    {
      /* Set Ethernet duplex mode to HalfDuplex following the autonegotiation */
      ETH_InitStruct->ETH_Mode = ETH_Mode_HalfDuplex;
    }
    /* Configure the MAC with the speed fixed by the autonegotiation process */
    if(RegValue & PHY_Speed_Status)
    {
      /* Set Ethernet speed to 100M following the autonegotiation */
      ETH_InitStruct->ETH_Speed = ETH_Speed_10M;
    }
    else
    {
      /* Set Ethernet speed to 10M following the autonegotiation */
      ETH_InitStruct->ETH_Speed = ETH_Speed_100M;
    }
  }
//  else
  {
    if(!ETH_WritePHYRegister(PHYAddress, PHY_BCR, ((u16)(ETH_InitStruct->ETH_Mode >> 3) |
                                                   (u16)(ETH_InitStruct->ETH_Speed >> 1))))
    {
      /* Return ERROR in case of write timeout */
      return ETH_ERROR;
    }

    vTaskDelay( 250 / portTICK_PERIOD_MS );
  }

/*------------------------- ETHERNET MACCR Configuration ---------------------*/
  /* Get the ETHERNET MACCR value */
  tmpreg = ETH_MAC->MACCR;
  /* Clear WD, PCE, PS, TE and RE bits */
  tmpreg &= MACCR_CLEAR_Mask;

  /* Set the WD bit according to ETH_Watchdog value */
  /* Set the JD: bit according to ETH_Jabber value */
  /* Set the JE bit according to ETH_JumboFrame value */
  /* Set the IFG bit according to ETH_InterFrameGap value */
  /* Set the DCRS bit according to ETH_CarrierSense value */
  /* Set the FES bit according to ETH_Speed value */
  /* Set the DO bit according to ETH_ReceiveOwn value */
  /* Set the LM bit according to ETH_LoopbackMode value */
  /* Set the DM bit according to ETH_Mode value */
  /* Set the IPC bit according to ETH_ChecksumOffload value */
  /* Set the DR bit according to ETH_RetryTransmission value */
  /* Set the ACS bit according to ETH_AutomaticPadCRCStrip value */
  /* Set the BL bit according to ETH_BackOffLimit value */
  /* Set the DC bit according to ETH_DeferralCheck value */
  tmpreg |= (u32)(ETH_InitStruct->ETH_Watchdog |
                  ETH_InitStruct->ETH_Jabber |
                  ETH_InitStruct->ETH_JumboFrame |
                  ETH_InitStruct->ETH_InterFrameGap |
                  ETH_InitStruct->ETH_CarrierSense |
                  ETH_InitStruct->ETH_Speed |
                  ETH_InitStruct->ETH_ReceiveOwn |
                  ETH_InitStruct->ETH_LoopbackMode |
                  ETH_InitStruct->ETH_Mode |
                  ETH_InitStruct->ETH_ChecksumOffload |
                  ETH_InitStruct->ETH_RetryTransmission |
                  ETH_InitStruct->ETH_AutomaticPadCRCStrip |
                  ETH_InitStruct->ETH_BackOffLimit |
                  ETH_InitStruct->ETH_DeferralCheck);

  /* Write to ETHERNET MACCR */
  ETH_MAC->MACCR = (u32)tmpreg;

/*------------------------ ETHERNET MACFFR Configuration ---------------------*/
  /* Set the RA bit according to ETH_ReceiveAll value */
  /* Set the SAF and SAIF bits according to ETH_SourceAddrFilter value */
  /* Set the PCF bit according to ETH_PassControlFrames value */
  /* Set the DBF bit according to ETH_BroadcastFramesReception value */
  /* Set the DAIF bit according to ETH_DestinationAddrFilter value */
  /* Set the PR bit according to ETH_PromiscuousMode value */
  /* Set the PM, HMC and HPF bits according to ETH_MulticastFramesFilter value */
  /* Set the HUC and HPF bits according to ETH_UnicastFramesFilter value */
  /* Write to ETHERNET MACFFR */
  ETH_MAC->MACFFR = (u32)(ETH_InitStruct->ETH_ReceiveAll |
                          ETH_InitStruct->ETH_SourceAddrFilter |
                          ETH_InitStruct->ETH_PassControlFrames |
                          ETH_InitStruct->ETH_BroadcastFramesReception |
                          ETH_InitStruct->ETH_DestinationAddrFilter |
                          ETH_InitStruct->ETH_PromiscuousMode |
                          ETH_InitStruct->ETH_MulticastFramesFilter |
                          ETH_InitStruct->ETH_UnicastFramesFilter);

/*---------------- ETHERNET MACHTHR and MACHTLR Configuration ----------------*/
  /* Write to ETHERNET MACHTHR */
  ETH_MAC->MACHTHR = (u32)ETH_InitStruct->ETH_HashTableHigh;
  /* Write to ETHERNET MACHTLR */
  ETH_MAC->MACHTLR = (u32)ETH_InitStruct->ETH_HashTableLow;

/*------------------------ ETHERNET MACFCR Configuration ---------------------*/
  /* Get the ETHERNET MACFCR value */
  tmpreg = ETH_MAC->MACFCR;
  /* Clear xx bits */
  tmpreg &= MACFCR_CLEAR_Mask;

  /* Set the PT bit according to ETH_PauseTime value */
  /* Set the DZPQ bit according to ETH_ZeroQuantaPause value */
  /* Set the PLT bit according to ETH_PauseLowThreshold value */
  /* Set the UP bit according to ETH_UnicastPauseFrameDetect value */
  /* Set the RFE bit according to ETH_ReceiveFlowControl value */
  /* Set the TFE bit according to ETH_TransmitFlowControl value */
  tmpreg |= (u32)((ETH_InitStruct->ETH_PauseTime << 16) |
                   ETH_InitStruct->ETH_ZeroQuantaPause |
                   ETH_InitStruct->ETH_PauseLowThreshold |
                   ETH_InitStruct->ETH_UnicastPauseFrameDetect |
                   ETH_InitStruct->ETH_ReceiveFlowControl |
                   ETH_InitStruct->ETH_TransmitFlowControl);

  /* Write to ETHERNET MACFCR */
  ETH_MAC->MACFCR = (u32)tmpreg;

/*------------------------ ETHERNET MACVLANTR Configuration ------------------*/
  /* Set the ETV bit according to ETH_VLANTagComparison value */
  /* Set the VL bit according to ETH_VLANTagIdentifier value */
  ETH_MAC->MACVLANTR = (u32)(ETH_InitStruct->ETH_VLANTagComparison |
                             ETH_InitStruct->ETH_VLANTagIdentifier);

#ifdef _ETH_DMA
/*--------------------------------- DMA Config -------------------------------*/
/*------------------------ ETHERNET DMAOMR Configuration ---------------------*/
  /* Get the ETHERNET DMAOMR value */
  tmpreg = ETH_DMA->DMAOMR;
  /* Clear xx bits */
  tmpreg &= DMAOMR_CLEAR_Mask;

  /* Set the DT bit according to ETH_DropTCPIPChecksumErrorFrame value */
  /* Set the RSF bit according to ETH_ReceiveStoreForward value */
  /* Set the DFF bit according to ETH_FlushReceivedFrame value */
  /* Set the TSF bit according to ETH_TransmitStoreForward value */
  /* Set the TTC bit according to ETH_TransmitThresholdControl value */
  /* Set the FEF bit according to ETH_ForwardErrorFrames value */
  /* Set the FUF bit according to ETH_ForwardUndersizedGoodFrames value */
  /* Set the RTC bit according to ETH_ReceiveThresholdControl value */
  /* Set the OSF bit according to ETH_SecondFrameOperate value */
  tmpreg |= (u32)(ETH_InitStruct->ETH_DropTCPIPChecksumErrorFrame |
                  ETH_InitStruct->ETH_ReceiveStoreForward |
                  ETH_InitStruct->ETH_FlushReceivedFrame |
                  ETH_InitStruct->ETH_TransmitStoreForward |
                  ETH_InitStruct->ETH_TransmitThresholdControl |
                  ETH_InitStruct->ETH_ForwardErrorFrames |
                  ETH_InitStruct->ETH_ForwardUndersizedGoodFrames |
                  ETH_InitStruct->ETH_ReceiveThresholdControl |
                  ETH_InitStruct->ETH_SecondFrameOperate);

  /* Write to ETHERNET DMAOMR */
  ETH_DMA->DMAOMR = (u32)tmpreg;

/*------------------------ ETHERNET DMABMR Configuration ---------------------*/
  /* Set the AAL bit according to ETH_AddressAlignedBeats value */
  /* Set the FB bit according to ETH_FixedBurst value */
  /* Set the RPBL and 4*PBL bits according to ETH_RxDMABurstLength value */
  /* Set the PBL and 4*PBL bits according to ETH_TxDMABurstLength value */
  /* Set the DSL bit according to ETH_DesciptorSkipLength value */
  /* Set the PR and DA bits according to ETH_DMAArbitration value */
  ETH_DMA->DMABMR = (u32)(ETH_InitStruct->ETH_AddressAlignedBeats |
                          ETH_InitStruct->ETH_FixedBurst |
                          ETH_InitStruct->ETH_RxDMABurstLength | /* !! if 4xPBL is selected for Tx or Rx it is applied for the other */
                          ETH_InitStruct->ETH_TxDMABurstLength |
                         (ETH_InitStruct->ETH_DescriptorSkipLength << 2) |
                          ETH_InitStruct->ETH_DMAArbitration |
				                  ETH_DMABMR_USP); /* Enable use of separate PBL for Rx and Tx */
#endif /* _ETH_DMA */

  /* Return Ethernet configuration success */
  return ETH_SUCCESS;
}

/*******************************************************************************
* Function Name  : ETH_StructInit
* Desciption    : Fills each ETH_InitStruct member with its default value.
* Input          : - ETH_InitStruct: pointer to a ETH_InitTypeDef structure
*                    which will be initialized.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_StructInit(ETH_InitTypeDef* ETH_InitStruct)
{
  /* ETH_InitStruct members default value */
  /*------------------------   MAC   -----------------------------------*/
  ETH_InitStruct->ETH_AutoNegotiation = ETH_AutoNegotiation_Disable;
  ETH_InitStruct->ETH_Watchdog = ETH_Watchdog_Enable;
  ETH_InitStruct->ETH_Jabber = ETH_Jabber_Enable;
  ETH_InitStruct->ETH_JumboFrame = ETH_JumboFrame_Disable;
  ETH_InitStruct->ETH_InterFrameGap = ETH_InterFrameGap_96Bit;
  ETH_InitStruct->ETH_CarrierSense = ETH_CarrierSense_Enable;
  ETH_InitStruct->ETH_Speed = ETH_Speed_10M;
  ETH_InitStruct->ETH_ReceiveOwn = ETH_ReceiveOwn_Enable;
  ETH_InitStruct->ETH_LoopbackMode = ETH_LoopbackMode_Disable;
  ETH_InitStruct->ETH_Mode = ETH_Mode_HalfDuplex;
  ETH_InitStruct->ETH_ChecksumOffload = ETH_ChecksumOffload_Disable;
  ETH_InitStruct->ETH_RetryTransmission = ETH_RetryTransmission_Enable;
  ETH_InitStruct->ETH_AutomaticPadCRCStrip = ETH_AutomaticPadCRCStrip_Disable;
  ETH_InitStruct->ETH_BackOffLimit = ETH_BackOffLimit_10;
  ETH_InitStruct->ETH_DeferralCheck = ETH_DeferralCheck_Disable;
  ETH_InitStruct->ETH_ReceiveAll = ETH_ReceiveAll_Disable;
  ETH_InitStruct->ETH_SourceAddrFilter = ETH_SourceAddrFilter_Disable;
  ETH_InitStruct->ETH_PassControlFrames = ETH_PassControlFrames_BlockAll;
  ETH_InitStruct->ETH_BroadcastFramesReception = ETH_BroadcastFramesReception_Disable;
  ETH_InitStruct->ETH_DestinationAddrFilter = ETH_DestinationAddrFilter_Normal;
  ETH_InitStruct->ETH_PromiscuousMode = ETH_PromiscuousMode_Disable;
  ETH_InitStruct->ETH_MulticastFramesFilter = ETH_MulticastFramesFilter_Perfect;
  ETH_InitStruct->ETH_UnicastFramesFilter = ETH_UnicastFramesFilter_Perfect;
  ETH_InitStruct->ETH_HashTableHigh = 0x0;
  ETH_InitStruct->ETH_HashTableLow = 0x0;
  ETH_InitStruct->ETH_PauseTime = 0x0;
  ETH_InitStruct->ETH_ZeroQuantaPause = ETH_ZeroQuantaPause_Disable;
  ETH_InitStruct->ETH_PauseLowThreshold = ETH_PauseLowThreshold_Minus4;
  ETH_InitStruct->ETH_UnicastPauseFrameDetect = ETH_UnicastPauseFrameDetect_Disable;
  ETH_InitStruct->ETH_ReceiveFlowControl = ETH_ReceiveFlowControl_Disable;
  ETH_InitStruct->ETH_TransmitFlowControl = ETH_TransmitFlowControl_Disable;
  ETH_InitStruct->ETH_VLANTagComparison = ETH_VLANTagComparison_16Bit;
  ETH_InitStruct->ETH_VLANTagIdentifier = 0x0;

#ifdef _ETH_DMA
/*------------------------   DMA   -----------------------------------*/
  ETH_InitStruct->ETH_DropTCPIPChecksumErrorFrame = ETH_DropTCPIPChecksumErrorFrame_Disable;
  ETH_InitStruct->ETH_ReceiveStoreForward = ETH_ReceiveStoreForward_Enable;
  ETH_InitStruct->ETH_FlushReceivedFrame = ETH_FlushReceivedFrame_Disable;
  ETH_InitStruct->ETH_TransmitStoreForward = ETH_TransmitStoreForward_Enable;
  ETH_InitStruct->ETH_TransmitThresholdControl = ETH_TransmitThresholdControl_64Bytes;
  ETH_InitStruct->ETH_ForwardErrorFrames = ETH_ForwardErrorFrames_Disable;
  ETH_InitStruct->ETH_ForwardUndersizedGoodFrames = ETH_ForwardUndersizedGoodFrames_Disable;
  ETH_InitStruct->ETH_ReceiveThresholdControl = ETH_ReceiveThresholdControl_64Bytes;
  ETH_InitStruct->ETH_SecondFrameOperate = ETH_SecondFrameOperate_Disable;
  ETH_InitStruct->ETH_AddressAlignedBeats = ETH_AddressAlignedBeats_Enable;
  ETH_InitStruct->ETH_FixedBurst = ETH_FixedBurst_Disable;
  ETH_InitStruct->ETH_RxDMABurstLength = ETH_RxDMABurstLength_1Beat;
  ETH_InitStruct->ETH_TxDMABurstLength = ETH_TxDMABurstLength_1Beat;
  ETH_InitStruct->ETH_DescriptorSkipLength = 0x0;
  ETH_InitStruct->ETH_DMAArbitration = ETH_DMAArbitration_RoundRobin_RxTx_1_1;

#endif /* _ETH_DMA */
}

/*******************************************************************************
* Function Name  : ETH_Start
* Desciption     : Enables ENET MAC and DMA reception/transmission
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_Start(void)
{
  /* Enable transmit state machine of the MAC for transmission on the MII */
  ETH_MACTransmissionCmd(ENABLE);
  /* Flush Transmit FIFO */
  ETH_FlushTransmitFIFO();
  /* Enable receive state machine of the MAC for reception from the MII */
  ETH_MACReceptionCmd(ENABLE);

#ifdef _ETH_DMA
  /* Start DMA transmission */
  ETH_DMATransmissionCmd(ENABLE);
  /* Start DMA reception */
  ETH_DMAReceptionCmd(ENABLE);
#endif /* _ETH_DMA */
}

#ifdef _ETH_DMA
/*******************************************************************************
* Function Name  : ETH_HandleTxPkt
* Desciption     : Transmits a packet, from application buffer, pointed by ppkt.
* Input          : - ppkt: pointer to application packet Buffer.
*                  - FrameLength: Tx Packet size.
* Output         : None
* Return         : ETH_ERROR: in case of Tx desc owned by DMA
*                  ETH_SUCCESS: for correct transmission
*******************************************************************************/
u32 ETH_HandleTxPkt(u32 addr, u16 FrameLength)
{

  // Check if the descriptor is owned by the ETHERNET DMA (when set) or CPU (when reset)
  if((DMATxDescToSet->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
  {
    // Return ERROR: OWN bit set
    return ETH_ERROR;
  }

  //Set the DMA buffer address to send to the Packet we received from stack
  DMATxDescToSet->Buffer1Addr = (u32)addr;

  // Setting the Frame Length: bits[12:0]
  DMATxDescToSet->ControlBufferSize = (FrameLength & ETH_DMATxDesc_TBS1);

  // Setting the last segment and first segment bits (in this case a frame is transmitted in one descriptor)
  DMATxDescToSet->Status |= ETH_DMATxDesc_LS | ETH_DMATxDesc_FS;

  // Set Own bit of the Tx descriptor Status: gives the buffer back to ETHERNET DMA
  DMATxDescToSet->Status |= ETH_DMATxDesc_OWN;

  // When Tx Buffer unavailable flag is set: clear it and resume transmission
  if ((ETH_DMA->DMASR & ETH_DMASR_TBUS) != (u32)RESET)
  {
    // Clear TBUS ETHERNET DMA flag
    ETH_DMA->DMASR = ETH_DMASR_TBUS;
    // Resume DMA transmission
    ETH_DMA->DMATPDR = 0;
  }

  // Update the ETHERNET DMA global Tx descriptor with next Tx decriptor
  // Chained Mode
  if((DMATxDescToSet->Status & ETH_DMATxDesc_TCH) != (u32)RESET)
  {
    // Selects the next DMA Tx descriptor list for next buffer to send
    DMATxDescToSet = (ETH_DMADESCTypeDef*) (DMATxDescToSet->Buffer2NextDescAddr);
  }
  else // Ring Mode
  {
    if((DMATxDescToSet->Status & ETH_DMATxDesc_TER) != (u32)RESET)
    {
      // Selects the first DMA Tx descriptor for next buffer to send: last Tx descriptor was used
      DMATxDescToSet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMATDLAR);
    }
    else
    {
      // Selects the next DMA Tx descriptor list for next buffer to send
      DMATxDescToSet = (ETH_DMADESCTypeDef*) ((u32)DMATxDescToSet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
    }
  }


  // Return SUCCESS
  return ETH_SUCCESS;
}

/*******************************************************************************
* Function Name  : ETH_HandleRxPkt
* Desciption     : Receives a packet and copies it to memory pointed by ppkt.
* Input          : None
* Output         : ppkt: pointer on application receive buffer.
* Return         : ETH_ERROR: if there is error in reception
*                  Received packet size: if packet reception is correct
*******************************************************************************/
u32 ETH_HandleRxPkt(u32 addr)
{
  // Check if the descriptor is owned by the ETHERNET DMA (when set) or CPU (when reset)
  if((DMARxDescToGet->Status & ETH_DMARxDesc_OWN) != (u32)RESET)
  {
    // Return error: OWN bit set
    return ETH_ERROR;
  }

  //Set the buffer address to rcv frame for the same descriptor (reserved packet)
  DMARxDescToGet->Buffer1Addr = addr;

  if(addr) {
   // Set Own bit of the Rx descriptor Status: gives the buffer back to ETHERNET DMA
   DMARxDescToGet->Status = ETH_DMARxDesc_OWN;
  }

  // Update the ETHERNET DMA global Rx descriptor with next Rx decriptor
  // Chained Mode
  if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RCH) != (u32)RESET)
  {
    // Selects the next DMA Rx descriptor list for next buffer to read
    DMARxDescToGet = (ETH_DMADESCTypeDef*) (DMARxDescToGet->Buffer2NextDescAddr);
  }
  else // Ring Mode
  {
    if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RER) != (u32)RESET)
    {
      // Selects the first DMA Rx descriptor for next buffer to read: last Rx descriptor was used
      DMARxDescToGet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMARDLAR);
    }
    else
    {
      // Selects the next DMA Rx descriptor list for next buffer to read
      DMARxDescToGet = (ETH_DMADESCTypeDef*) ((u32)DMARxDescToGet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
    }
  }

  return(1);
}


/*******************************************************************************
* Function Name  : ETH_GetRxPktSize
* Desciption     : Get the size of received the received packet.
* Input          : None
* Output         : None
* Return         : Rx packet size
*******************************************************************************/
u32 ETH_GetRxPktSize(void)
{
  u32 FrameLength = 0;

  //Test DMARxDescToGet is not NULL
  if(DMARxDescToGet)
  {
    /* Get the size of the packet: including 4 bytes of the CRC */
    FrameLength = ETH_GetDMARxDescFrameLength(DMARxDescToGet);

  }

 /* Return Frame Length */
 return FrameLength;
}

/*******************************************************************************
* Function Name  : ETH_DropRxPkt
* Desciption     : Drop a Received packet (too small packet, etc...)
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DropRxPkt(void)
{

  // Set Own bit of the Rx descriptor Status: gives the buffer back to ETHERNET DMA
  DMARxDescToGet->Status = ETH_DMARxDesc_OWN;


  // Chained Mode
  if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RCH) != (u32)RESET)
  {
    // Selects the next DMA Rx descriptor list for next buffer read
    DMARxDescToGet = (ETH_DMADESCTypeDef*) (DMARxDescToGet->Buffer2NextDescAddr);
  }
  else // Ring Mode
  {
    if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RER) != (u32)RESET)
    {
      // Selects the next DMA Rx descriptor list for next buffer read: this will
      //   be the first Rx descriptor in this case
      DMARxDescToGet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMARDLAR);
    }
    else
    {
      // Selects the next DMA Rx descriptor list for next buffer read
      DMARxDescToGet = (ETH_DMADESCTypeDef*) ((u32)DMARxDescToGet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
    }
  }
}

#endif /* _ETH_DMA */
/*---------------------------------  PHY  ------------------------------------*/

/*******************************************************************************
* Function Name  : ETH_ReadPHYRegister
* Desciption     : Read a PHY register
* Input          : - PHYAddress: PHY device address, is the index of one of supported
*                    32 PHY devices.
*                    This parameter can be one of the following values: 0,..,31
*                  - PHYReg: PHY register address, is the index of one of the 32
*                    PHY register.
*                    This parameter can be one of the following values:
*                       - PHY_BCR    : Tranceiver Basic Control Register
*                       - PHY_BSR    : Tranceiver Basic Status Register
*                       - PHY_SR     : Tranceiver Status Register
*                       - More PHY register could be read depending on the used PHY
* Output         : None
* Return         : ETH_ERROR: in case of timeout
*                  Data read from the selected PHY register: for correct read
*******************************************************************************/
u16 ETH_ReadPHYRegister(u16 PHYAddress, u16 PHYReg)
{
  u32 tmpreg = 0;
  u32 timeout = 0;

  /* Check the parameters */
  eth_assert_param(IS_ETH_PHY_ADDRESS(PHYAddress));
  eth_assert_param(IS_ETH_PHY_REG(PHYReg));

  /* Get the ETHERNET MACMIIAR value */
  tmpreg = ETH_MAC->MACMIIAR;
  /* Keep only the CSR Clock Range CR[2:0] bits value */
  tmpreg &= ~MACMIIAR_CR_Mask;

  /* Prepare the MII address register value */
  tmpreg |=(((u32)PHYAddress<<11) & ETH_MACMIIAR_PA); /* Set the PHY device address */
  tmpreg |=(((u32)PHYReg<<6) & ETH_MACMIIAR_MR);      /* Set the PHY register address */
  tmpreg &= ~ETH_MACMIIAR_MW;                         /* Set the read mode */
  tmpreg |= ETH_MACMIIAR_MB;						  /* Set the MII Busy bit */

  /* Write the result value into the MII Address register */
  ETH_MAC->MACMIIAR = tmpreg;

  /* Check for the Busy flag */
  do
  {
    timeout++;
    tmpreg = ETH_MAC->MACMIIAR;
  } while ((tmpreg & ETH_MACMIIAR_MB) && (timeout < (u32)PHY_READ_TO));

  /* Return ERROR in case of timeout */
  if(timeout == PHY_READ_TO)
  {
    return (u16)ETH_ERROR;
  }

  /* Return data register value */
  return (u16)(ETH_MAC->MACMIIDR);
}

/*******************************************************************************
* Function Name  : ETH_WritePHYRegister
* Desciption     : Write to a PHY register
* Input          : - PHYAddress: PHY device address, is the index of one of supported
*                    32 PHY devices.
*                    This parameter can be one of the following values: 0,..,31
*                  - PHYReg: PHY register address, is the index of one of the 32
*                    PHY register.
*                    This parameter can be one of the following values:
*                       - PHY_BCR    : Tranceiver Control Register
*                       - More PHY register could be written depending on the used PHY
*                  - PHYValue: the value to write
* Output         : None
* Return         : ETH_ERROR: in case of timeout
*                  ETH_SUCCESS: for correct read
*******************************************************************************/
u32 ETH_WritePHYRegister(u16 PHYAddress, u16 PHYReg, u16 PHYValue)
{
  u32 tmpreg = 0;
  u32 timeout = 0;

  /* Check the parameters */
  eth_assert_param(IS_ETH_PHY_ADDRESS(PHYAddress));
  eth_assert_param(IS_ETH_PHY_REG(PHYReg));

  /* Get the ETHERNET MACMIIAR value */
  tmpreg = ETH_MAC->MACMIIAR;
  /* Keep only the CSR Clock Range CR[2:0] bits value */
  tmpreg &= ~MACMIIAR_CR_Mask;

  /* Prepare the MII register address value */
  tmpreg |=(((u32)PHYAddress<<11) & ETH_MACMIIAR_PA); /* Set the PHY device address */
  tmpreg |=(((u32)PHYReg<<6) & ETH_MACMIIAR_MR);      /* Set the PHY register address */
  tmpreg |= ETH_MACMIIAR_MW;                          /* Set the write mode */
  tmpreg |= ETH_MACMIIAR_MB;			              /* Set the MII Busy bit */

  /* Give the value to the MII data register */
  ETH_MAC->MACMIIDR = PHYValue;

  /* Write the result value into the MII Address register */
  ETH_MAC->MACMIIAR = tmpreg;

  /* Check for the Busy flag */
  do
  {
    timeout++;
    tmpreg = ETH_MAC->MACMIIAR;
  } while ((tmpreg & ETH_MACMIIAR_MB) && (timeout < (u32)PHY_WRITE_TO));

  /* Return ERROR in case of timeout */
  if(timeout == PHY_WRITE_TO)
  {
    return ETH_ERROR;
  }

  /* Return SUCCESS */
  return ETH_SUCCESS;
}

/*******************************************************************************
* Function Name  : ETH_PHYLoopBackCmd
* Desciption     : Enables or disables the PHY loopBack mode.
* Input          : - PHYAddress: PHY device address, is the index of one of supported
*                    32 PHY devices.
*                    This parameter can be one of the following values:
*                  - NewState: new state of the PHY loopBack mode.
*                    This parameter can be: ENABLE or DISABLE.
*                  Note: Don't be confused with ETH_MACLoopBackCmd function
*                        which enables internal loopback at MII level
* Output         : None
* Return         : None
*******************************************************************************/
u32 ETH_PHYLoopBackCmd(u16 PHYAddress, FunctionalState NewState)
{
  u16 tmpreg = 0;

  /* Check the parameters */
  eth_assert_param(IS_ETH_PHY_ADDRESS(PHYAddress));
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  /* Get the PHY configuration to update it */
  tmpreg = ETH_ReadPHYRegister(PHYAddress, PHY_BCR);

  if (NewState != DISABLE)
  {
    /* Enable the PHY loopback mode */
    tmpreg |= PHY_Loopback;
  }
  else
  {
    /* Disable the PHY loopback mode: normal mode */
    tmpreg &= (u16)(~(u16)PHY_Loopback);
  }

  /* Update the PHY control register with the new configuration */
  if(ETH_WritePHYRegister(PHYAddress, PHY_BCR, tmpreg) != (u32)RESET)
  {
    return ETH_SUCCESS;
  }
  else
  {
    /* Return SUCCESS */
    return ETH_ERROR;
  }
}

/*---------------------------------  MAC  ------------------------------------*/

/*******************************************************************************
* Function Name  : ETH_MACTransmissionCmd
* Desciption     : Enables or disables the MAC transmission.
* Input          : - NewState: new state of the MAC transmission.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACTransmissionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC transmission */
    ETH_MAC->MACCR |= ETH_MACCR_TE;
  }
  else
  {
    /* Disable the MAC transmission */
    ETH_MAC->MACCR &= ~ETH_MACCR_TE;
  }
}

/*******************************************************************************
* Function Name  : ETH_MACReceptionCmd
* Desciption     : Enables or disables the MAC reception.
* Input          : - NewState: new state of the MAC reception.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACReceptionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC reception */
    ETH_MAC->MACCR |= ETH_MACCR_RE;
  }
  else
  {
    /* Disable the MAC reception */
    ETH_MAC->MACCR &= ~ETH_MACCR_RE;
  }
}

/*******************************************************************************
* Function Name  : ETH_GetFlowControlBusyStatus
* Desciption     : Checks whether the ETHERNET flow control busy bit is set or not.
* Input          : None
* Output         : None
* Return         : The new state of flow control busy status bit (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetFlowControlBusyStatus(void)
{
  FlagStatus bitstatus = RESET;

  /* The Flow Control register should not be written to until this bit is cleared */
  if ((ETH_MAC->MACFCR & ETH_MACFCR_FCBBPA) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_InitiatePauseControlFrame
* Desciption     : Initiate a Pause Control Frame (Full-duplex only).
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_InitiatePauseControlFrame(void)
{
  /* When Set In full duplex MAC initiates pause control frame */
  ETH_MAC->MACFCR |= ETH_MACFCR_FCBBPA;
}

/*******************************************************************************
* Function Name  : ETH_BackPressureActivationCmd
* Desciption     : Enables or disables the MAC BackPressure operation activation (Half-duplex only).
* Input          : - NewState: new state of the MAC BackPressure operation activation.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_BackPressureActivationCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Activate the MAC BackPressure operation */
    /* In Half duplex: during backpressure, when the MAC receives a new frame,
    the transmitter starts sending a JAM pattern resulting in a collision */
    ETH_MAC->MACFCR |= ETH_MACFCR_FCBBPA;
  }
  else
  {
    /* Desactivate the MAC BackPressure operation */
    ETH_MAC->MACFCR &= ~ETH_MACFCR_FCBBPA;
  }
}

/*******************************************************************************
* Function Name  : ETH_GetMACFlagStatus
* Desciption     : Checks whether the specified ETHERNET MAC flag is set or not.
* Input          : - ETH_MAC_FLAG: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_MAC_FLAG_TST  : Time stamp trigger flag
*                       - ETH_MAC_FLAG_MMCT : MMC transmit flag
*                       - ETH_MAC_FLAG_MMCR : MMC receive flag
*                       - ETH_MAC_FLAG_MMC  : MMC flag
*                       - ETH_MAC_FLAG_PMT  : PMT flag
* Output         : None
* Return         : The new state of ETHERNET MAC flag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetMACFlagStatus(u32 ETH_MAC_FLAG)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_GET_FLAG(ETH_MAC_FLAG));

  if ((ETH_MAC->MACSR & ETH_MAC_FLAG) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_GetMACITStatus
* Desciption     : Checks whether the specified ETHERNET MAC interrupt has occurred or not.
* Input          : - ETH_MAC_IT: specifies the interrupt source to check.
*                    This parameter can be one of the following values:
*                       - ETH_MAC_IT_TST   : Time stamp trigger interrupt
*                       - ETH_MAC_IT_MMCT : MMC transmit interrupt
*                       - ETH_MAC_IT_MMCR : MMC receive interrupt
*                       - ETH_MAC_IT_MMC  : MMC interrupt
*                       - ETH_MAC_IT_PMT  : PMT interrupt
* Output         : None
* Return         : The new state of ETHERNET MAC interrupt (SET or RESET).
*******************************************************************************/
ITStatus ETH_GetMACITStatus(u32 ETH_MAC_IT)
{
  ITStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_GET_IT(ETH_MAC_IT));

  if ((ETH_MAC->MACSR & ETH_MAC_IT) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_MACITConfig
* Desciption     : Enables or disables the specified ETHERNET MAC interrupts.
* Input          : - ETH_MAC_IT: specifies the ETHERNET MAC interrupt sources to be
*                    enabled or disabled.
*                    This parameter can be any combination of the following values:
*                       - ETH_MAC_IT_TST : Time stamp trigger interrupt
*                       - ETH_MAC_IT_PMT : PMT interrupt
*                  - NewState: new state of the specified ETHERNET MAC interrupts.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACITConfig(u32 ETH_MAC_IT, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_IT(ETH_MAC_IT));
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected ETHERNET MAC interrupts */
    ETH_MAC->MACIMR &= (~(u32)ETH_MAC_IT);
  }
  else
  {
    /* Disable the selected ETHERNET MAC interrupts */
    ETH_MAC->MACIMR |= ETH_MAC_IT;
  }
}

/*******************************************************************************
* Function Name  : ETH_MACAddressConfig
* Desciption     : Configures the selected MAC address.
* Input          : - MacAddr: The MAC addres to configure.
*                    This parameter can be one of the following values:
*                     - ETH_MAC_Address0 : MAC Address0
*                     - ETH_MAC_Address1 : MAC Address1
*                     - ETH_MAC_Address2 : MAC Address2
*                     - ETH_MAC_Address3 : MAC Address3
*                  - Addr: Pointer on MAC address buffer data (6 bytes).
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACAddressConfig(u32 MacAddr, u8 *Addr)
{
  u32 tmpreg;

  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_ADDRESS0123(MacAddr));

  /* Calculate the selectecd MAC address high register */
  tmpreg = ((u32)Addr[5] << 8) | (u32)Addr[4];

  /* Load the selectecd MAC address high register */
  (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) = tmpreg;

  /* Calculate the selectecd MAC address low register */
  tmpreg = ((u32)Addr[3] << 24) | ((u32)Addr[2] << 16) | ((u32)Addr[1] << 8) | Addr[0];

  /* Load the selectecd MAC address low register */
  (*(vu32 *) (ETH_MAC_AddrLowBase + MacAddr)) = tmpreg;
}

/*******************************************************************************
* Function Name  : ETH_GetMACAddress
* Desciption     : Get the selected MAC address.
* Input          : - MacAddr: The MAC addres to return.
*                    This parameter can be one of the following values:
*                     - ETH_MAC_Address0 : MAC Address0
*                     - ETH_MAC_Address1 : MAC Address1
*                     - ETH_MAC_Address2 : MAC Address2
*                     - ETH_MAC_Address3 : MAC Address3
*                  - Addr: Pointer on MAC address buffer data (6 bytes).
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_GetMACAddress(u32 MacAddr, u8 *Addr)
{
  u32 tmpreg;

  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_ADDRESS0123(MacAddr));

  /* Get the selectecd MAC address high register */
  tmpreg =(*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr));

  /* Calculate the selectecd MAC address buffer */
  Addr[5] = ((tmpreg >> 8) & (u8)0xFF);
  Addr[4] = (tmpreg & (u8)0xFF);

  /* Load the selectecd MAC address low register */
  tmpreg =(*(vu32 *) (ETH_MAC_AddrLowBase + MacAddr));

  /* Calculate the selectecd MAC address buffer */
  Addr[3] = ((tmpreg >> 24) & (u8)0xFF);
  Addr[2] = ((tmpreg >> 16) & (u8)0xFF);
  Addr[1] = ((tmpreg >> 8 ) & (u8)0xFF);
  Addr[0] = (tmpreg & (u8)0xFF);
}

/*******************************************************************************
* Function Name  : ETH_MACAddressPerfectFilterCmd
* Desciption     : Enables or disables the Address filter module uses the specified
*                  ETHERNET MAC address for perfect filtering
* Input          : - MacAddr: specifies the ETHERNET MAC address to be used for prfect filtering.
*                    This parameter can be one of the following values:
*                     - ETH_MAC_Address1 : MAC Address1
*                     - ETH_MAC_Address2 : MAC Address2
*                     - ETH_MAC_Address3 : MAC Address3
*                  - NewState: new state of the specified ETHERNET MAC address use.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACAddressPerfectFilterCmd(u32 MacAddr, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_ADDRESS123(MacAddr));
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected ETHERNET MAC address for perfect filtering */
    (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) |= ETH_MACA1HR_AE;
  }
  else
  {
    /* Disable the selected ETHERNET MAC address for perfect filtering */
    (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) &=(~(u32)ETH_MACA1HR_AE);
  }
}

/*******************************************************************************
* Function Name  : ETH_MACAddressFilterConfig
* Desciption     : Set the filter type for the specified ETHERNET MAC address
* Input          : - MacAddr: specifies the ETHERNET MAC address
*                    This parameter can be one of the following values:
*                     - ETH_MAC_Address1 : MAC Address1
*                     - ETH_MAC_Address2 : MAC Address2
*                     - ETH_MAC_Address3 : MAC Address3
*                  - Filter: specifies the used frame received field for comparaison
*                    This parameter can be one of the following values:
*                     - ETH_MAC_AddressFilter_SA : MAC Address is used to compare
*                       with the SA fields of the received frame.
*                     - ETH_MAC_AddressFilter_DA : MAC Address is used to compare
*                       with the DA fields of the received frame.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACAddressFilterConfig(u32 MacAddr, u32 Filter)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_ADDRESS123(MacAddr));
  eth_assert_param(IS_ETH_MAC_ADDRESS_FILTER(Filter));

  if (Filter != ETH_MAC_AddressFilter_DA)
  {
    /* The selected ETHERNET MAC address is used to compare with the SA fields of the
       received frame. */
    (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) |= ETH_MACA1HR_SA;
  }
  else
  {
    /* The selected ETHERNET MAC address is used to compare with the DA fields of the
       received frame. */
    (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) &=(~(u32)ETH_MACA1HR_SA);
  }
}

/*******************************************************************************
* Function Name  : ETH_MACAddressMaskBytesFilterConfig
* Desciption     : Set the filter type for the specified ETHERNET MAC address
* Input          : - MacAddr: specifies the ETHERNET MAC address
*                    This parameter can be one of the following values:
*                     - ETH_MAC_Address1 : MAC Address1
*                     - ETH_MAC_Address2 : MAC Address2
*                     - ETH_MAC_Address3 : MAC Address3
*                  - MaskByte: specifies the used address bytes for comparaison
*                    This parameter can be any combination of the following values:
*                     - ETH_MAC_AddressMask_Byte6 : Mask MAC Address high reg bits [15:8].
*                     - ETH_MAC_AddressMask_Byte5 : Mask MAC Address high reg bits [7:0].
*                     - ETH_MAC_AddressMask_Byte4 : Mask MAC Address low reg bits [31:24].
*                     - ETH_MAC_AddressMask_Byte3 : Mask MAC Address low reg bits [23:16].
*                     - ETH_MAC_AddressMask_Byte2 : Mask MAC Address low reg bits [15:8].
*                     - ETH_MAC_AddressMask_Byte1 : Mask MAC Address low reg bits [7:0].
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MACAddressMaskBytesFilterConfig(u32 MacAddr, u32 MaskByte)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MAC_ADDRESS123(MacAddr));
  eth_assert_param(IS_ETH_MAC_ADDRESS_MASK(MaskByte));

  /* Clear MBC bits in the selected MAC address  high register */
  (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) &=(~(u32)ETH_MACA1HR_MBC);

  /* Set the selected Filetr mask bytes */
  (*(vu32 *) (ETH_MAC_AddrHighBase + MacAddr)) |= MaskByte;
}

/*------------------------  DMA Tx/Rx Desciptors ----------------------------*/
#ifdef _ETH_DMA
/*******************************************************************************
* Function Name  : ETH_DMATxDescChainInit
* Desciption     : Initializes the DMA Tx descriptors in chain mode.
* Input          : - DMATxDescTab: Pointer on the first Tx desc list
*                  - TxBuff: Pointer on the first TxBuffer list
*                  - TxBuffCount: Number of the used Tx desc in the list
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescChainInit(ETH_DMADESCTypeDef *DMATxDescTab, u8* TxBuff, u32 TxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMATxDesc;

  /* Set the DMATxDescToSet pointer with the first one of the DMATxDescTab list */
  DMATxDescToSet = DMATxDescTab;

  /* Fill each DMATxDesc descriptor with the right values */
  for(i=0; i < TxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Tx Desc list */
    DMATxDesc = DMATxDescTab + i;

    /* Set Second Address Chained bit */
    DMATxDesc->Status = ETH_DMATxDesc_TCH;

    /* Set Buffer1 address pointer */
    DMATxDesc->Buffer1Addr = (u32)*((u32*)TxBuff + i);

    /* Initialize the next descriptor with the Next Desciptor Polling Enable */
    if(i < (TxBuffCount-1))
    {
      /* Set next descriptor address register with next descriptor base address */
      DMATxDesc->Buffer2NextDescAddr = (u32)(DMATxDescTab+i+1);
    }
    else
    {
      /* For last descriptor, set next descriptor address register equal to the first descriptor base address */
      DMATxDesc->Buffer2NextDescAddr = (u32) DMATxDescTab;
    }
  }

  /* Set Transmit Desciptor List Address Register */
  ETH_DMA->DMATDLAR = (u32) DMATxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescRingInit
* Desciption     : Initializes the DMA Tx descriptors in ring mode.
* Input          : - DMATxDescTab: Pointer on the first Tx desc list
*                  - TxBuff1: Pointer on the first TxBuffer1 list
*                  - TxBuff2: Pointer on the first TxBuffer2 list
*                  - TxBuffCount: Number of the used Tx desc in the list
*                Note: see decriptor skip length defined in ETH_DMA_InitStruct
                       for the number of Words to skip between two unchained descriptors.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescRingInit(ETH_DMADESCTypeDef *DMATxDescTab, u8 *TxBuff1, u8 *TxBuff2, u32 TxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMATxDesc;

  /* Set the DMATxDescToSet pointer with the first one of the DMATxDescTab list */
  DMATxDescToSet = DMATxDescTab;

  /* Fill each DMATxDesc descriptor with the right values */
  for(i=0; i < TxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Tx Desc list */
    DMATxDesc = DMATxDescTab + i;

    /* Set Buffer1 address pointer */
    DMATxDesc->Buffer1Addr = (u32)(&TxBuff1[i*ETH_MAX_PACKET_SIZE]);

    /* Set Buffer2 address pointer */
    DMATxDesc->Buffer2NextDescAddr = (u32)(&TxBuff2[i*ETH_MAX_PACKET_SIZE]);

    /* Set Transmit End of Ring bit for last descriptor: The DMA returns to the base
       address of the list, creating a Desciptor Ring */
    if(i == (TxBuffCount-1))
    {
      /* Set Transmit End of Ring bit */
      DMATxDesc->Status = ETH_DMATxDesc_TER;
    }
  }

  /* Set Transmit Desciptor List Address Register */
  ETH_DMA->DMATDLAR =  (u32) DMATxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_GetDMATxDescFlagStatus
* Desciption     : Checks whether the specified ETHERNET DMA Tx Desc flag is set or not.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - ETH_DMATxDescFlag: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_DMATxDesc_OWN : OWN bit: descriptor is owned by DMA engine
*                       - ETH_DMATxDesc_IC  : Interrupt on completetion
*                       - ETH_DMATxDesc_LS  : Last Segment
*                       - ETH_DMATxDesc_FS  : First Segment
*                       - ETH_DMATxDesc_DC  : Disable CRC
*                       - ETH_DMATxDesc_DP  : Disable Pad
*                       - ETH_DMATxDesc_TTSE: Transmit Time Stamp	Enable
*                       - ETH_DMATxDesc_TER : Transmit End of Ring
*                       - ETH_DMATxDesc_TCH : Second Address Chained
*                       - ETH_DMATxDesc_TTSS: Tx Time Stamp Status
*                       - ETH_DMATxDesc_IHE : IP Header Error
*                       - ETH_DMATxDesc_ES  : Error summary
*                       - ETH_DMATxDesc_JT  : Jabber Timeout
*                       - ETH_DMATxDesc_FF  : Frame Flushed: DMA/MTL flushed the frame due to SW flush
*                       - ETH_DMATxDesc_PCE : Payload Checksum Error
*                       - ETH_DMATxDesc_LCA : Loss of Carrier: carrier lost during tramsmission
*                       - ETH_DMATxDesc_NC  : No Carrier: no carrier signal from the tranceiver
*                       - ETH_DMATxDesc_LCO : Late Collision: transmission aborted due to collision
*                       - ETH_DMATxDesc_EC  : Excessive Collision: transmission aborted after 16 collisions
*                       - ETH_DMATxDesc_VF  : VLAN Frame
*                       - ETH_DMATxDesc_CC  : Collision Count
*                       - ETH_DMATxDesc_ED  : Excessive Deferral
*                       - ETH_DMATxDesc_UF  : Underflow Error: late data arrival from the memory
*                       - ETH_DMATxDesc_DB  : Deferred Bit
* Output         : None
* Return         : The new state of ETH_DMATxDescFlag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetDMATxDescFlagStatus(ETH_DMADESCTypeDef *DMATxDesc, u32 ETH_DMATxDescFlag)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_DMATxDESC_GET_FLAG(ETH_DMATxDescFlag));

  if ((DMATxDesc->Status & ETH_DMATxDescFlag) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_GetDMATxDescCollisionCount
* Desciption     : Returns the specified ETHERNET DMA Tx Desc collision count.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
* Output         : None
* Return         : The Transmit descriptor collision counter value.
*******************************************************************************/
u32 ETH_GetDMATxDescCollisionCount(ETH_DMADESCTypeDef *DMATxDesc)
{
  /* Return the Receive descriptor frame length */
  return ((DMATxDesc->Status & ETH_DMATxDesc_CC) >> ETH_DMATxDesc_CollisionCountShift);
}

/*******************************************************************************
* Function Name  : ETH_SetDMATxDescOwnBit
* Desciption     : Set the specified DMA Tx Desc Own bit.
* Input          : - DMATxDesc: Pointer on a Tx desc
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetDMATxDescOwnBit(ETH_DMADESCTypeDef *DMATxDesc)
{
  /* Set the DMA Tx Desc Own bit */
  DMATxDesc->Status |= ETH_DMATxDesc_OWN;
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescTransmitITConfig
* Desciption     : Enables or disables the specified DMA Tx Desc Transmit interrupt.
* Input          : - DMATxDesc: Pointer on a Tx desc
*                  - NewState: new state of the DMA Tx Desc transmit interrupt.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescTransmitITConfig(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the DMA Tx Desc Transmit interrupt */
    DMATxDesc->Status |= ETH_DMATxDesc_IC;
  }
  else
  {
    /* Disable the DMA Tx Desc Transmit interrupt */
    DMATxDesc->Status &=(~(u32)ETH_DMATxDesc_IC);
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescFrameSegmentConfig
* Desciption     : Enables or disables the specified DMA Tx Desc Transmit interrupt.
* Input          : - DMATxDesc: Pointer on a Tx desc
*                  - FrameSegment: specifies is the actual Tx desc contain last or first segment.
*                    This parameter can be one of the following values:
*                       - ETH_DMATxDesc_LastSegment  : actual Tx desc contain last segment
*                       - ETH_DMATxDesc_FirstSegment : actual Tx desc contain first segment
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescFrameSegmentConfig(ETH_DMADESCTypeDef *DMATxDesc, u32 DMATxDesc_FrameSegment)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_TXDESC_SEGMENT(DMATxDesc_FrameSegment));

  /* Selects the DMA Tx Desc Frame segment */
  DMATxDesc->Status |= DMATxDesc_FrameSegment;
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescChecksumInsertionConfig
* Desciption     : Selects the specified ETHERNET DMA Tx Desc Checksum Insertion.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - Checksum: specifies is the DMA Tx desc checksum insertion.
*                    This parameter can be one of the following values:
*                       - ETH_DMATxDesc_ChecksumByPass : Checksum bypass
*                       - ETH_DMATxDesc_ChecksumIPV4Header : IPv4 header checksum
*                       - ETH_DMATxDesc_ChecksumTCPUDPICMPSegment : TCP/UDP/ICMP checksum. Pseudo header checksum is assumed to be present
*                       - ETH_DMATxDesc_ChecksumTCPUDPICMPFull : TCP/UDP/ICMP checksum fully in hardware including pseudo header
* Output         : None
* Return         : The Transmit descriptor collision.
*******************************************************************************/
void ETH_DMATxDescChecksumInsertionConfig(ETH_DMADESCTypeDef *DMATxDesc, u32 DMATxDesc_Checksum)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_TXDESC_CHECKSUM(DMATxDesc_Checksum));

  /* Set the selected DMA Tx desc checksum insertion control */
  DMATxDesc->Status |= DMATxDesc_Checksum;
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescCRCCmd
* Desciption     : Enables or disables the DMA Tx Desc CRC.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - NewState: new state of the specified DMA Tx Desc CRC.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescCRCCmd(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Tx Desc CRC */
    DMATxDesc->Status &= (~(u32)ETH_DMATxDesc_DC);
  }
  else
  {
    /* Disable the selected DMA Tx Desc CRC */
    DMATxDesc->Status |= ETH_DMATxDesc_DC;
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescEndOfRingCmd
* Desciption     : Enables or disables the DMA Tx Desc end of ring.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - NewState: new state of the specified DMA Tx Desc end of ring.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : NoneH
* Return         : None
*******************************************************************************/
void ETH_DMATxDescEndOfRingCmd(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Tx Desc end of ring */
    DMATxDesc->Status |= ETH_DMATxDesc_TER;
  }
  else
  {
    /* Disable the selected DMA Tx Desc end of ring */
    DMATxDesc->Status &= (~(u32)ETH_DMATxDesc_TER);
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescSecondAddressChainedCmd
* Desciption     : Enables or disables the DMA Tx Desc second address chained.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - NewState: new state of the specified DMA Tx Desc second address chained.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescSecondAddressChainedCmd(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Tx Desc second address chained */
    DMATxDesc->Status |= ETH_DMATxDesc_TCH;
  }
  else
  {
    /* Disable the selected DMA Tx Desc second address chained */
    DMATxDesc->Status &=(~(u32)ETH_DMATxDesc_TCH);
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescShortFramePaddingCmd
* Desciption     : Enables or disables the DMA Tx Desc padding for frame shorter than 64 bytes.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - NewState: new state of the specified DMA Tx Desc padding for
*                    frame shorter than 64 bytes.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescShortFramePaddingCmd(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Tx Desc padding for frame shorter than 64 bytes */
    DMATxDesc->Status &= (~(u32)ETH_DMATxDesc_DP);
  }
  else
  {
    /* Disable the selected DMA Tx Desc padding for frame shorter than 64 bytes*/
    DMATxDesc->Status |= ETH_DMATxDesc_DP;
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescTimeStampCmd
* Desciption     : Enables or disables the DMA Tx Desc time stamp.
* Input          : - DMATxDesc: pointer on a DMA Tx descriptor
*                  - NewState: new state of the specified DMA Tx Desc time stamp.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescTimeStampCmd(ETH_DMADESCTypeDef *DMATxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Tx Desc time stamp */
    DMATxDesc->Status |= ETH_DMATxDesc_TTSE;
  }
  else
  {
    /* Disable the selected DMA Tx Desc time stamp */
    DMATxDesc->Status &=(~(u32)ETH_DMATxDesc_TTSE);
  }
}

/*******************************************************************************
* Function Name  : ETH_DMATxDescBufferSizeConfig
* Desciption     : Configures the specified DMA Tx Desc buffer1 and buffer2 sizes.
* Input          : - DMATxDesc: Pointer on a Tx desc
*                  - BufferSize1: specifies the Tx desc buffer1 size.
*                  - BufferSize2: specifies the Tx desc buffer2 size (put "0" if not used).
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATxDescBufferSizeConfig(ETH_DMADESCTypeDef *DMATxDesc, u32 BufferSize1, u32 BufferSize2)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMATxDESC_BUFFER_SIZE(BufferSize1));
  eth_assert_param(IS_ETH_DMATxDESC_BUFFER_SIZE(BufferSize2));

  /* Set the DMA Tx Desc buffer1 and buffer2 sizes values */
  DMATxDesc->ControlBufferSize |= (BufferSize1 | (BufferSize2 << ETH_DMATxDesc_BufferSize2Shift));
}

/*******************************************************************************
* Function Name  : ETH_DMARxDescChainInit
* Desciption     : Initializes the DMA Rx descriptors in chain mode.
* Input          : - DMARxDescTab: Pointer on the first Rx desc list
*                  - RxBuff: Pointer on the first RxBuffer list
*                  - RxBuffCount: Number of the used Rx desc in the list
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMARxDescChainInit(ETH_DMADESCTypeDef *DMARxDescTab, u8 *RxBuff, u32 RxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMARxDesc;

  /* Set the DMARxDescToGet pointer with the first one of the DMARxDescTab list */
  DMARxDescToGet = DMARxDescTab;

  /* Fill each DMARxDesc descriptor with the right values */
  for(i=0; i < RxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Rx Desc list */
    DMARxDesc = DMARxDescTab+i;

    /* Set Own bit of the Rx descriptor Status */
    DMARxDesc->Status = ETH_DMARxDesc_OWN;
//    DMARxDesc->Status = 0;

    /* Set Buffer1 size and Second Address Chained bit */
    DMARxDesc->ControlBufferSize = ETH_DMARxDesc_RCH | (u32)ETH_MAX_PACKET_SIZE;

    /* Set Buffer1 address pointer */
    DMARxDesc->Buffer1Addr = (u32)*((u32*)RxBuff + i);

    /* Initialize the next descriptor with the Next Desciptor Polling Enable */
    if(i < (RxBuffCount-1))
    {
      /* Set next descriptor address register with next descriptor base address */
      DMARxDesc->Buffer2NextDescAddr = (u32)(DMARxDescTab+i+1);
    }
    else
    {
      /* For last descriptor, set next descriptor address register equal to the first descriptor base address */
      DMARxDesc->Buffer2NextDescAddr = (u32)(DMARxDescTab);
    }
  }

  /* Set Receive Desciptor List Address Register */
  ETH_DMA->DMARDLAR = (u32) DMARxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_DMARxDescRingInit
* Desciption     : Initializes the DMA Rx descriptors in ring mode.
* Input          : - DMARxDescTab: Pointer on the first Rx desc list
*                  - RxBuff1: Pointer on the first RxBuffer1 list
*                  - RxBuff2: Pointer on the first RxBuffer2 list
*                  - RxBuffCount: Number of the used Rx desc in the list
*                Note: see decriptor skip length defined in ETH_DMA_InitStruct
                       for the number of Words to skip between two unchained descriptors.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMARxDescRingInit(ETH_DMADESCTypeDef *DMARxDescTab, u8 *RxBuff1, u8 *RxBuff2, u32 RxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMARxDesc;

  /* Set the DMARxDescToGet pointer with the first one of the DMARxDescTab list */
  DMARxDescToGet = DMARxDescTab;

  /* Fill each DMARxDesc descriptor with the right values */
  for(i=0; i < RxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Rx Desc list */
    DMARxDesc = DMARxDescTab+i;

    /* Set Own bit of the Rx descriptor Status */
    DMARxDesc->Status = ETH_DMARxDesc_OWN;

    /* Set Buffer1 size */
    DMARxDesc->ControlBufferSize = ETH_MAX_PACKET_SIZE;

    /* Set Buffer1 address pointer */
    DMARxDesc->Buffer1Addr = (u32)(&RxBuff1[i*ETH_MAX_PACKET_SIZE]);

    /* Set Buffer2 address pointer */
    DMARxDesc->Buffer2NextDescAddr = (u32)(&RxBuff2[i*ETH_MAX_PACKET_SIZE]);

    /* Set Receive End of Ring bit for last descriptor: The DMA returns to the base
       address of the list, creating a Desciptor Ring */
    if(i == (RxBuffCount-1))
    {
      /* Set Receive End of Ring bit */
      DMARxDesc->ControlBufferSize |= ETH_DMARxDesc_RER;
    }
  }

  /* Set Receive Desciptor List Address Register */
  ETH_DMA->DMARDLAR = (u32) DMARxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_GetDMARxDescFlagStatus
* Desciption     : Checks whether the specified ETHERNET Rx Desc flag is set or not.
* Input          : - DMARxDesc: pointer on a DMA Rx descriptor
*                  - ETH_DMARxDescFlag: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_DMARxDesc_OWN:         OWN bit: descriptor is owned by DMA engine
*                       - ETH_DMARxDesc_AFM:         DA Filter Fail for the rx frame
*                       - ETH_DMARxDesc_ES:          Error summary
*                       - ETH_DMARxDesc_DE:          Desciptor error: no more descriptors for receive frame
*                       - ETH_DMARxDesc_SAF:         SA Filter Fail for the received frame
*                       - ETH_DMARxDesc_LE:          Frame size not matching with length field
*                       - ETH_DMARxDesc_OE:          Overflow Error: Frame was damaged due to buffer overflow
*                       - ETH_DMARxDesc_VLAN:        VLAN Tag: received frame is a VLAN frame
*                       - ETH_DMARxDesc_FS:          First descriptor of the frame
*                       - ETH_DMARxDesc_LS:          Last descriptor of the frame
*                       - ETH_DMARxDesc_IPV4HCE:     IPC Checksum Error/Giant Frame: Rx Ipv4 header checksum error
*                       - ETH_DMARxDesc_RxLongFrame: (Giant Frame)Rx - frame is longer than 1518/1522
*                       - ETH_DMARxDesc_LC:          Late collision occurred during reception
*                       - ETH_DMARxDesc_FT:          Frame type - Ethernet, otherwise 802.3
*                       - ETH_DMARxDesc_RWT:         Receive Watchdog Timeout: watchdog timer expired during reception
*                       - ETH_DMARxDesc_RE:          Receive error: error reported by MII interface
*                       - ETH_DMARxDesc_DE:          Dribble bit error: frame contains non int multiple of 8 bits
*                       - ETH_DMARxDesc_CE:          CRC error
*                       - ETH_DMARxDesc_MAMPCE:      Rx MAC Address/Payload Checksum Error: Rx MAC address matched/ Rx Payload Checksum Error
* Output         : None
* Return         : The new state of ETH_DMARxDescFlag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetDMARxDescFlagStatus(ETH_DMADESCTypeDef *DMARxDesc, u32 ETH_DMARxDescFlag)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_DMARxDESC_GET_FLAG(ETH_DMARxDescFlag));

  if ((DMARxDesc->Status & ETH_DMARxDescFlag) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_SetDMARxDescOwnBit
* Desciption     : Set the specified DMA Rx Desc Own bit.
* Input          : - DMARxDesc: Pointer on a Rx desc
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetDMARxDescOwnBit(ETH_DMADESCTypeDef *DMARxDesc)
{
  /* Set the DMA Rx Desc Own bit */
  DMARxDesc->Status |= ETH_DMARxDesc_OWN;
}

/*******************************************************************************
* Function Name  : ETH_GetDMARxDescFrameLength
* Desciption     : Returns the specified DMA Rx Desc frame length.
* Input          : - DMARxDesc: pointer on a DMA Rx descriptor
* Output         : None
* Return         : The Rx descriptor received frame length.
*******************************************************************************/
u32 ETH_GetDMARxDescFrameLength(ETH_DMADESCTypeDef *DMARxDesc)
{
  /* Return the Receive descriptor frame length */
  return ((DMARxDesc->Status & ETH_DMARxDesc_FL) >> ETH_DMARxDesc_FrameLengthShift);
}

/*******************************************************************************
* Function Name  : ETH_DMARxDescReceiveITConfig
* Desciption     : Enables or disables the specified DMA Rx Desc receive interrupt.
* Input          : - DMARxDesc: Pointer on a Rx desc
*                  - NewState: new state of the specified DMA Rx Desc interrupt.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMARxDescReceiveITConfig(ETH_DMADESCTypeDef *DMARxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the DMA Rx Desc receive interrupt */
    DMARxDesc->ControlBufferSize &=(~(u32)ETH_DMARxDesc_DIC);
  }
  else
  {
    /* Disable the DMA Rx Desc receive interrupt */
    DMARxDesc->ControlBufferSize |= ETH_DMARxDesc_DIC;
  }
}

/*******************************************************************************
* Function Name  : ETH_DMARxDescEndOfRingCmd
* Desciption     : Enables or disables the DMA Rx Desc end of ring.
* Input          : - DMARxDesc: pointer on a DMA Rx descriptor
*                  - NewState: new state of the specified DMA Rx Desc end of ring.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMARxDescEndOfRingCmd(ETH_DMADESCTypeDef *DMARxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Rx Desc end of ring */
    DMARxDesc->ControlBufferSize |= ETH_DMARxDesc_RER;
  }
  else
  {
    /* Disable the selected DMA Rx Desc end of ring */
    DMARxDesc->ControlBufferSize &=(~(u32)ETH_DMARxDesc_RER);
  }
}

/*******************************************************************************
* Function Name  : ETH_DMARxDescSecondAddressChainedCmd
* Desciption     : Enables or disables the DMA Rx Desc second address chained.
* Input          : - DMARxDesc: pointer on a DMA Rx descriptor
*                  - NewState: new state of the specified DMA Rx Desc second address chained.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMARxDescSecondAddressChainedCmd(ETH_DMADESCTypeDef *DMARxDesc, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected DMA Rx Desc second address chained */
    DMARxDesc->ControlBufferSize |= ETH_DMARxDesc_RCH;
  }
  else
  {
    /* Disable the selected DMA Rx Desc second address chained */
    DMARxDesc->ControlBufferSize &=(~(u32)ETH_DMARxDesc_RCH);
  }
}

/*******************************************************************************
* Function Name  : ETH_GetDMARxDescBufferSize
* Desciption     : Returns the specified ETHERNET DMA Rx Desc buffer size.
* Input          : - DMARxDesc: pointer on a DMA Rx descriptor
*                  - DMARxDesc_Buffer: specifies the DMA Rx Desc buffer.
*                    This parameter can be any one of the following values:
*                       - ETH_DMARxDesc_Buffer1 : DMA Rx Desc Buffer1
*                       - ETH_DMARxDesc_Buffer2 : DMA Rx Desc Buffer2
* Output         : None
* Return         : The Receive descriptor frame length.
*******************************************************************************/
u32 ETH_GetDMARxDescBufferSize(ETH_DMADESCTypeDef *DMARxDesc, u32 DMARxDesc_Buffer)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_RXDESC_BUFFER(DMARxDesc_Buffer));

  if(DMARxDesc_Buffer != ETH_DMARxDesc_Buffer1)
  {
    /* Return the DMA Rx Desc buffer2 size */
    return ((DMARxDesc->ControlBufferSize & ETH_DMARxDesc_RBS2) >> ETH_DMARxDesc_Buffer2SizeShift);
  }
  else
  {
    /* Return the DMA Rx Desc buffer1 size */
    return (DMARxDesc->ControlBufferSize & ETH_DMARxDesc_RBS1);
  }
}

/*---------------------------------  DMA  ------------------------------------*/
/*******************************************************************************
* Function Name  : ETH_SoftwareReset
* Desciption     : Resets all MAC subsystem internal registers and logic.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SoftwareReset(void)
{
  /* Set the SWR bit: resets all MAC subsystem internal registers and logic */
  /* After reset all the registers holds their respective reset values */
  ETH_DMA->DMABMR |= ETH_DMABMR_SR;
}

/*******************************************************************************
* Function Name  : ETH_GetSoftwareResetStatus
* Desciption     : Checks whether the ETHERNET software reset bit is set or not.
* Input          : None
* Output         : None
* Return         : The new state of DMA Bus Mode register SR bit (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetSoftwareResetStatus(void)
{
  FlagStatus bitstatus = RESET;

  if((ETH_DMA->DMABMR & ETH_DMABMR_SR) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_GetDMAFlagStatus
* Desciption     : Checks whether the specified ETHERNET DMA flag is set or not.
* Input          : - ETH_DMA_IT: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_DMA_FLAG_TST : Time-stamp trigger flag
*                       - ETH_DMA_FLAG_PMT : PMT flag
*                       - ETH_DMA_FLAG_MMC : MMC flag
*                       - ETH_DMA_FLAG_DataTransferError : Error bits 0-data buffer, 1-desc. access
*                       - ETH_DMA_FLAG_ReadWriteError    : Error bits 0-write trnsf, 1-read transfr
*                       - ETH_DMA_FLAG_AccessError       : Error bits 0-Rx DMA, 1-Tx DMA
*                       - ETH_DMA_FLAG_NIS : Normal interrupt summary flag
*                       - ETH_DMA_FLAG_AIS : Abnormal interrupt summary flag
*                       - ETH_DMA_FLAG_ER  : Early receive flag
*                       - ETH_DMA_FLAG_FBE : Fatal bus error flag
*                       - ETH_DMA_FLAG_ET  : Early transmit flag
*                       - ETH_DMA_FLAG_RWT : Receive watchdog timeout flag
*                       - ETH_DMA_FLAG_RPS : Receive process stopped flag
*                       - ETH_DMA_FLAG_RBU : Receive buffer unavailable flag
*                       - ETH_DMA_FLAG_R   : Receive flag
*                       - ETH_DMA_FLAG_TU  : Underflow flag
*                       - ETH_DMA_FLAG_RO  : Overflow flag
*                       - ETH_DMA_FLAG_TJT : Transmit jabber timeout flag
*                       - ETH_DMA_FLAG_TBU : Transmit buffer unavailable flag
*                       - ETH_DMA_FLAG_TPS : Transmit process stopped flag
*                       - ETH_DMA_FLAG_T   : Transmit flag
* Output         : None
* Return         : The new state of ETH_DMA_FLAG (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetDMAFlagStatus(u32 ETH_DMA_FLAG)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_GET_IT(ETH_DMA_FLAG));

  if ((ETH_DMA->DMASR & ETH_DMA_FLAG) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_DMAClearFlag
* Desciption     : Clears the ETHERNET?s DMA pending flag.
* Input          : - ETH_DMA_FLAG: specifies the flag to clear.
*                    This parameter can be any combination of the following values:
*                       - ETH_DMA_FLAG_NIS : Normal interrupt summary flag
*                       - ETH_DMA_FLAG_AIS : Abnormal interrupt summary flag
*                       - ETH_DMA_FLAG_ER  : Early receive flag
*                       - ETH_DMA_FLAG_FBE : Fatal bus error flag
*                       - ETH_DMA_FLAG_ETI : Early transmit flag
*                       - ETH_DMA_FLAG_RWT : Receive watchdog timeout flag
*                       - ETH_DMA_FLAG_RPS : Receive process stopped flag
*                       - ETH_DMA_FLAG_RBU : Receive buffer unavailable flag
*                       - ETH_DMA_FLAG_R   : Receive flag
*                       - ETH_DMA_FLAG_TU  : Transmit Underflow flag
*                       - ETH_DMA_FLAG_RO  : Receive Overflow flag
*                       - ETH_DMA_FLAG_TJT : Transmit jabber timeout flag
*                       - ETH_DMA_FLAG_TBU : Transmit buffer unavailable flag
*                       - ETH_DMA_FLAG_TPS : Transmit process stopped flag
*                       - ETH_DMA_FLAG_T   : Transmit flag
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAClearFlag(u32 ETH_DMA_FLAG)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_FLAG(ETH_DMA_FLAG));

  /* Clear the selected ETHERNET DMA FLAG */
  ETH_DMA->DMASR = (u32) ETH_DMA_FLAG;
}

/*******************************************************************************
* Function Name  : ETH_GetDMAITStatus
* Desciption     : Checks whether the specified ETHERNET DMA interrupt has occured or not.
* Input          : - ETH_DMA_IT: specifies the interrupt source to check.
*                    This parameter can be one of the following values:
*                       - ETH_DMA_IT_TST : Time-stamp trigger interrupt
*                       - ETH_DMA_IT_PMT : PMT interrupt
*                       - ETH_DMA_IT_MMC : MMC interrupt
*                       - ETH_DMA_IT_NIS : Normal interrupt summary
*                       - ETH_DMA_IT_AIS : Abnormal interrupt summary
*                       - ETH_DMA_IT_ER  : Early receive interrupt
*                       - ETH_DMA_IT_FBE : Fatal bus error interrupt
*                       - ETH_DMA_IT_ET  : Early transmit interrupt
*                       - ETH_DMA_IT_RWT : Receive watchdog timeout interrupt
*                       - ETH_DMA_IT_RPS : Receive process stopped interrupt
*                       - ETH_DMA_IT_RBU : Receive buffer unavailable interrupt
*                       - ETH_DMA_IT_R   : Receive interrupt
*                       - ETH_DMA_IT_TU  : Underflow interrupt
*                       - ETH_DMA_IT_RO  : Overflow interrupt
*                       - ETH_DMA_IT_TJT : Transmit jabber timeout interrupt
*                       - ETH_DMA_IT_TBU : Transmit buffer unavailable interrupt
*                       - ETH_DMA_IT_TPS : Transmit process stopped interrupt
*                       - ETH_DMA_IT_T   : Transmit interrupt
* Output         : None
* Return         : The new state of ETH_DMA_IT (SET or RESET).
*******************************************************************************/
ITStatus ETH_GetDMAITStatus(u32 ETH_DMA_IT)
{
  ITStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_GET_IT(ETH_DMA_IT));

  if ((ETH_DMA->DMASR & ETH_DMA_IT) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_DMAClearITPendingBit
* Desciption     : Clears the ETHERNET?s DMA IT pending bit.
* Input          : - ETH_DMA_IT: specifies the interrupt pending bit to clear.
*                    This parameter can be any combination of the following values:
*                       - ETH_DMA_IT_NIS : Normal interrupt summary
*                       - ETH_DMA_IT_AIS : Abnormal interrupt summary
*                       - ETH_DMA_IT_ER  : Early receive interrupt
*                       - ETH_DMA_IT_FBE : Fatal bus error interrupt
*                       - ETH_DMA_IT_ETI : Early transmit interrupt
*                       - ETH_DMA_IT_RWT : Receive watchdog timeout interrupt
*                       - ETH_DMA_IT_RPS : Receive process stopped interrupt
*                       - ETH_DMA_IT_RBU : Receive buffer unavailable interrupt
*                       - ETH_DMA_IT_R   : Receive interrupt
*                       - ETH_DMA_IT_TU  : Transmit Underflow interrupt
*                       - ETH_DMA_IT_RO  : Receive Overflow interrupt
*                       - ETH_DMA_IT_TJT : Transmit jabber timeout interrupt
*                       - ETH_DMA_IT_TBU : Transmit buffer unavailable interrupt
*                       - ETH_DMA_IT_TPS : Transmit process stopped interrupt
*                       - ETH_DMA_IT_T   : Transmit interrupt
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAClearITPendingBit(u32 ETH_DMA_IT)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_IT(ETH_DMA_IT));

  /* Clear the selected ETHERNET DMA IT */
  ETH_DMA->DMASR = (u32) ETH_DMA_IT;
}

/*******************************************************************************
* Function Name  : ETH_GetDMATransmitProcessState
* Desciption     : Returns the ETHERNET DMA Transmit Process State.
* Input          : None
* Output         : None
* Return         : The new ETHERNET DMA Transmit Process State:
*                  This can be one of the following values:
*                     - ETH_DMA_TransmitProcess_Stopped   : Stopped - Reset or Stop Tx Command issued
*                     - ETH_DMA_TransmitProcess_Fetching  : Running - fetching the Tx descriptor
*                     - ETH_DMA_TransmitProcess_Waiting   : Running - waiting for status
*                     - ETH_DMA_TransmitProcess_Reading   : unning - reading the data from host memory
*                     - ETH_DMA_TransmitProcess_Suspended : Suspended - Tx Desciptor unavailabe
*                     - ETH_DMA_TransmitProcess_Closing   : Running - closing Rx descriptor
*******************************************************************************/
u32 ETH_GetTransmitProcessState(void)
{
  return ((u32)(ETH_DMA->DMASR & ETH_DMASR_TS));
}

/*******************************************************************************
* Function Name  : ETH_GetDMAReceiveProcessState
* Desciption     : Returns the ETHERNET DMA Receive Process State.
* Input          : None
* Output         : None
* Return         : The new ETHERNET DMA Receive Process State:
*                  This can be one of the following values:
*                     - ETH_DMA_ReceiveProcess_Stopped   : Stopped - Reset or Stop Rx Command issued
*                     - ETH_DMA_ReceiveProcess_Fetching  : Running - fetching the Rx descriptor
*                     - ETH_DMA_ReceiveProcess_Waiting   : Running - waiting for packet
*                     - ETH_DMA_ReceiveProcess_Suspended : Suspended - Rx Desciptor unavailable
*                     - ETH_DMA_ReceiveProcess_Closing   : Running - closing descriptor
*                     - ETH_DMA_ReceiveProcess_Queuing   : Running - queuing the recieve frame into host memory
*******************************************************************************/
u32 ETH_GetReceiveProcessState(void)
{
  return ((u32)(ETH_DMA->DMASR & ETH_DMASR_RS));
}

/*******************************************************************************
* Function Name  : ETH_FlushTransmitFIFO
* Desciption     : Clears the ETHERNET transmit FIFO.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_FlushTransmitFIFO(void)
{
  /* Set the Flush Transmit FIFO bit */
  ETH_DMA->DMAOMR |= ETH_DMAOMR_FTF;
}

/*******************************************************************************
* Function Name  : ETH_GetFlushTransmitFIFOStatus
* Desciption     : Checks whether the ETHERNET transmit FIFO bit is cleared or not.
* Input          : None
* Output         : None
* Return         : The new state of ETHERNET flush transmit FIFO bit (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetFlushTransmitFIFOStatus(void)
{
  FlagStatus bitstatus = RESET;

  if ((ETH_DMA->DMAOMR & ETH_DMAOMR_FTF) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_DMATransmissionCmd
* Desciption     : Enables or disables the DMA transmission.
* Input          : - NewState: new state of the DMA transmission.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMATransmissionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the DMA transmission */
    ETH_DMA->DMAOMR |= ETH_DMAOMR_ST;
  }
  else
  {
    /* Disable the DMA transmission */
    ETH_DMA->DMAOMR &= ~ETH_DMAOMR_ST;
  }
}

/*******************************************************************************
* Function Name  : ETH_DMAReceptionCmd
* Desciption     : Enables or disables the DMA reception.
* Input          : - NewState: new state of the DMA reception.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAReceptionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the DMA reception */
    ETH_DMA->DMAOMR |= ETH_DMAOMR_SR;
  }
  else
  {
    /* Disable the DMA reception */
    ETH_DMA->DMAOMR &= ~ETH_DMAOMR_SR;
  }
}

/*******************************************************************************
* Function Name  : ETH_DMAITConfig
* Desciption     : Enables or disables the specified ETHERNET DMA interrupts.
* Input          : - ETH_DMA_IT: specifies the ETHERNET DMA interrupt sources to be
*                    enabled or disabled.
*                    This parameter can be any combination of the following values:
*                       - ETH_DMA_IT_NIS : Normal interrupt summary
*                       - ETH_DMA_IT_AIS : Abnormal interrupt summary
*                       - ETH_DMA_IT_ER  : Early receive interrupt
*                       - ETH_DMA_IT_FBE : Fatal bus error interrupt
*                       - ETH_DMA_IT_ET  : Early transmit interrupt
*                       - ETH_DMA_IT_RWT : Receive watchdog timeout interrupt
*                       - ETH_DMA_IT_RPS : Receive process stopped interrupt
*                       - ETH_DMA_IT_RBU : Receive buffer unavailable interrupt
*                       - ETH_DMA_IT_R   : Receive interrupt
*                       - ETH_DMA_IT_TU  : Underflow interrupt
*                       - ETH_DMA_IT_RO  : Overflow interrupt
*                       - ETH_DMA_IT_TJT : Transmit jabber timeout interrupt
*                       - ETH_DMA_IT_TBU : Transmit buffer unavailable interrupt
*                       - ETH_DMA_IT_TPS : Transmit process stopped interrupt
*                       - ETH_DMA_IT_T   : Transmit interrupt
*                  - NewState: new state of the specified ETHERNET DMA interrupts.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAITConfig(u32 ETH_DMA_IT, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_IT(ETH_DMA_IT));
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the selected ETHERNET DMA interrupts */
    ETH_DMA->DMAIER |= ETH_DMA_IT;
  }
  else
  {
    /* Disable the selected ETHERNET DMA interrupts */
    ETH_DMA->DMAIER &=(~(u32)ETH_DMA_IT);
  }
}

/*******************************************************************************
* Function Name  : ETH_GetDMAOverflowStatus
* Desciption     : Checks whether the specified ETHERNET DMA overflow flag is set or not.
* Input          : - ETH_DMA_Overflow: specifies the DMA overflow flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_DMA_Overflow_RxFIFOCounter : Overflow for FIFO Overflow Counter
*                       - ETH_DMA_Overflow_MissedFrameCounter : Overflow for Missed Frame Counter
* Output         : None
* Return         : The new state of ETHERNET DMA overflow Flag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetDMAOverflowStatus(u32 ETH_DMA_Overflow)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_DMA_GET_OVERFLOW(ETH_DMA_Overflow));

  if ((ETH_DMA->DMAMFBOCR & ETH_DMA_Overflow) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_GetRxOverflowMissedFrameCounter
* Desciption     : Get the ETHERNET DMA Rx Overflow Missed Frame Counter value.
* Input          : None
* Output         : None
* Return         : The value of Rx overflow Missed Frame Counter.
*******************************************************************************/
u32 ETH_GetRxOverflowMissedFrameCounter(void)
{
  return ((u32)((ETH_DMA->DMAMFBOCR & ETH_DMAMFBOCR_MFA)>>ETH_DMA_RxOverflowMissedFramesCounterShift));
}

/*******************************************************************************
* Function Name  : ETH_GetBufferUnavailableMissedFrameCounter
* Desciption     : Get the ETHERNET DMA Buffer Unavailable Missed Frame Counter value.
* Input          : None
* Output         : None
* Return         : The value of Buffer unavailable Missed Frame Counter.
*******************************************************************************/
u32 ETH_GetBufferUnavailableMissedFrameCounter(void)
{
  return ((u32)(ETH_DMA->DMAMFBOCR) & ETH_DMAMFBOCR_MFC);
}

/*******************************************************************************
* Function Name  : ETH_GetCurrentTxDescStartAddress
* Desciption     : Get the ETHERNET DMA DMACHTDR register value.
* Input          : None
* Output         : None
* Return         : The value of the current Tx desc start address.
*******************************************************************************/
u32 ETH_GetCurrentTxDescStartAddress(void)
{
  return ((u32)(ETH_DMA->DMACHTDR));
}

/*******************************************************************************
* Function Name  : ETH_GetCurrentRxDescStartAddress
* Desciption     : Get the ETHERNET DMA DMACHRDR register value.
* Input          : None
* Output         : None
* Return         : The value of the current Rx desc start address.
*******************************************************************************/
u32 ETH_GetCurrentRxDescStartAddress(void)
{
  return ((u32)(ETH_DMA->DMACHRDR));
}

/*******************************************************************************
* Function Name  : ETH_GetCurrentTxBufferAddress
* Desciption     : Get the ETHERNET DMA DMACHTBAR register value.
* Input          : None
* Output         : None
* Return         : The value of the current Tx desc buffer address.
*******************************************************************************/
u32 ETH_GetCurrentTxBufferAddress(void)
{
  return ((u32)(ETH_DMA->DMACHTBAR));
}

/*******************************************************************************
* Function Name  : ETH_GetCurrentRxBufferAddress
* Desciption     : Get the ETHERNET DMA DMACHRBAR register value.
* Input          : None
* Output         : None
* Return         : The value of the current Rx desc buffer address.
*******************************************************************************/
u32 ETH_GetCurrentRxBufferAddress(void)
{
  return ((u32)(ETH_DMA->DMACHRBAR));
}

/*******************************************************************************
* Function Name  : ETH_ResumeDMATransmission
* Desciption     : Resumes the DMA Transmission by writing to the DmaTxPollDemand
*                  register: (the data written could be anything). This forces
*                  the DMA to resume transmission.
* Input          : None
* Output         : None
* Return         : None.
*******************************************************************************/
void ETH_ResumeDMATransmission(void)
{
  ETH_DMA->DMATPDR = 0;
}

/*******************************************************************************
* Function Name  : ETH_ResumeDMAReception
* Desciption     : Resumes the DMA Transmission by writing to the DmaRxPollDemand
*                  register: (the data written could be anything). This forces
*                  the DMA to resume reception.
* Input          : None
* Output         : None
* Return         : None.
*******************************************************************************/
void ETH_ResumeDMAReception(void)
{
  ETH_DMA->DMARPDR = 0;
}

#endif /* _ETH_DMA */
/*---------------------------------  PMT  ------------------------------------*/
/*******************************************************************************
* Function Name  : ETH_ResetWakeUpFrameFilterRegisterPointer
* Desciption     : Reset Wakeup frame filter register pointer.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_ResetWakeUpFrameFilterRegisterPointer(void)
{
  /* Resets the Remote Wake-up Frame Filter register pointer to 0x0000 */
  ETH_MAC->MACPMTCSR |= ETH_MACPMTCSR_WFFRPR;
}

/*******************************************************************************
* Function Name  : ETH_SetWakeUpFrameFilterRegister
* Desciption     : Populates the remote wakeup frame registers.
* Input          : - Buffer: Pointer on remote WakeUp Frame Filter Register buffer
*                    data (8 words).
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetWakeUpFrameFilterRegister(u32 *Buffer)
{
  u32 i = 0;

  /* Fill Remote Wake-up Frame Filter register with Buffer data */
  for(i =0; i<ETH_WakeupRegisterLength; i++)
  {
    /* Write each time to the same register */
    ETH_MAC->MACRWUFFR = Buffer[i];
  }
}

/*******************************************************************************
* Function Name  : ETH_GlobalUnicastWakeUpCmd
* Desciption     : Enables or disables any unicast packet filtered by the MAC
*                 (DAF) address recognition to be a wake-up frame.
* Input          : - NewState: new state of the MAC Global Unicast Wake-Up.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_GlobalUnicastWakeUpCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC Global Unicast Wake-Up */
    ETH_MAC->MACPMTCSR |= ETH_MACPMTCSR_GU;
  }
  else
  {
    /* Disable the MAC Global Unicast Wake-Up */
    ETH_MAC->MACPMTCSR &= ~ETH_MACPMTCSR_GU;
  }
}

/*******************************************************************************
* Function Name  : ETH_GetPMTFlagStatus
* Desciption     : Checks whether the specified ETHERNET PMT flag is set or not.
* Input          : - ETH_PMT_FLAG: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_PMT_FLAG_WUFFRPR : Wake-Up Frame Filter Register Poniter Reset
*                       - ETH_PMT_FLAG_WUFR    : Wake-Up Frame Received
*                       - ETH_PMT_FLAG_MPR     : Magic Packet Received
* Output         : None
* Return         : The new state of ETHERNET PMT Flag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetPMTFlagStatus(u32 ETH_PMT_FLAG)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_PMT_GET_FLAG(ETH_PMT_FLAG));

  if ((ETH_MAC->MACPMTCSR & ETH_PMT_FLAG) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_WakeUpFrameDetectionCmd
* Desciption     : Enables or disables the MAC Wake-Up Frame Detection.
* Input          : - NewState: new state of the MAC Wake-Up Frame Detection.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_WakeUpFrameDetectionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC Wake-Up Frame Detection */
    ETH_MAC->MACPMTCSR |= ETH_MACPMTCSR_WFE;
  }
  else
  {
    /* Disable the MAC Wake-Up Frame Detection */
    ETH_MAC->MACPMTCSR &= ~ETH_MACPMTCSR_WFE;
  }
}

/*******************************************************************************
* Function Name  : ETH_MagicPacketDetectionCmd
* Desciption     : Enables or disables the MAC Magic Packet Detection.
* Input          : - NewState: new state of the MAC Magic Packet Detection.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MagicPacketDetectionCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC Magic Packet Detection */
    ETH_MAC->MACPMTCSR |= ETH_MACPMTCSR_MPE;
  }
  else
  {
    /* Disable the MAC Magic Packet Detection */
    ETH_MAC->MACPMTCSR &= ~ETH_MACPMTCSR_MPE;
  }
}

/*******************************************************************************
* Function Name  : ETH_PowerDownCmd
* Desciption     : Enables or disables the MAC Power Down.
* Input          : - NewState: new state of the MAC Power Down.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_PowerDownCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MAC Power Down */
    /* This puts the MAC in power down mode */
    ETH_MAC->MACPMTCSR |= ETH_MACPMTCSR_PD;
  }
  else
  {
    /* Disable the MAC Power Down */
    ETH_MAC->MACPMTCSR &= ~ETH_MACPMTCSR_PD;
  }
}

/*---------------------------------  MMC  ------------------------------------*/
#ifdef _ETH_MMC

/*******************************************************************************
* Function Name  : ETH_MMCCounterFreezeCmd
* Desciption     : Enables or disables the MMC Counter Freeze.
* Input          : - NewState: new state of the MMC Counter Freeze.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MMCCounterFreezeCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MMC Counter Freeze */
    ETH_MMC->MMCCR |= ETH_MMCCR_MCF;
  }
  else
  {
    /* Disable the MMC Counter Freeze */
    ETH_MMC->MMCCR &= ~ETH_MMCCR_MCF;
  }
}

/*******************************************************************************
* Function Name  : ETH_MMCResetOnReadCmd
* Desciption     : Enables or disables the MMC Reset On Read.
* Input          : - NewState: new state of the MMC Reset On Read.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MMCResetOnReadCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the MMC Counter reset on read */
    ETH_MMC->MMCCR |= ETH_MMCCR_ROR;
  }
  else
  {
    /* Disable the MMC Counter reset on read */
    ETH_MMC->MMCCR &= ~ETH_MMCCR_ROR;
  }
}

/*******************************************************************************
* Function Name  : ETH_MMCCounterRolloverCmd
* Desciption     : Enables or disables the MMC Counter Stop Rollover.
* Input          : - NewState: new state of the MMC Counter Stop Rollover.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MMCCounterRolloverCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Disable the MMC Counter Stop Rollover  */
    ETH_MMC->MMCCR &= ~ETH_MMCCR_CSR;
  }
  else
  {
    /* Enable the MMC Counter Stop Rollover */
    ETH_MMC->MMCCR |= ETH_MMCCR_CSR;
  }
}

/*******************************************************************************
* Function Name  : ETH_MMCCountersReset
* Desciption     : Resets the MMC Counters.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MMCCountersReset(void)
{
  /* Resets the MMC Counters */
  ETH_MMC->MMCCR |= ETH_MMCCR_CR;
}

/*******************************************************************************
* Function Name  : ETH_MMCITConfig
* Desciption     : Enables or disables the specified ETHERNET MMC interrupts.
* Input          : - ETH_MMC_IT: specifies the ETHERNET MMC interrupt
*                    sources to be enabled or disabled.
*                    This parameter can be any combination of Tx interrupt or
*                    any combination of Rx interrupt (but not both)of the following values:
*                       - ETH_MMC_IT_TGF   : When Tx good frame counter reaches half the maximum value
*                       - ETH_MMC_IT_TGFMSC: When Tx good multi col counter reaches half the maximum value
*                       - ETH_MMC_IT_TGFSC : When Tx good single col counter reaches half the maximum value
*                       - ETH_MMC_IT_RGUF  : When Rx good unicast frames counter reaches half the maximum value
*                       - ETH_MMC_IT_RFAE  : When Rx alignment error counter reaches half the maximum value
*                       - ETH_MMC_IT_RFCE  : When Rx crc error counter reaches half the maximum value
*                  - NewState: new state of the specified ETHERNET MMC interrupts.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_MMCITConfig(u32 ETH_MMC_IT, FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MMC_IT(ETH_MMC_IT));
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if ((ETH_MMC_IT & (u32)0x10000000) != (u32)RESET)
  {
    /* Remove egister mak from IT */
    ETH_MMC_IT &= 0xEFFFFFFF;

    /* ETHERNET MMC Rx interrupts selected */
    if (NewState != DISABLE)
    {
      /* Enable the selected ETHERNET MMC interrupts */
      ETH_MMC->MMCRIMR &=(~(u32)ETH_MMC_IT);
    }
    else
    {
      /* Disable the selected ETHERNET MMC interrupts */
      ETH_MMC->MMCRIMR |= ETH_MMC_IT;
    }
  }
  else
  {
    /* ETHERNET MMC Tx interrupts selected */
    if (NewState != DISABLE)
    {
      /* Enable the selected ETHERNET MMC interrupts */
      ETH_MMC->MMCTIMR &=(~(u32)ETH_MMC_IT);
    }
    else
    {
      /* Disable the selected ETHERNET MMC interrupts */
      ETH_MMC->MMCTIMR |= ETH_MMC_IT;
    }
  }
}

/*******************************************************************************
* Function Name  : ETH_GetMMCITStatus
* Desciption     : Checks whether the specified ETHERNET MMC IT is set or not.
* Input          : - ETH_MMC_IT: specifies the ETHERNET MMC interrupt.
*                    This parameter can be one of the following values:
*                       - ETH_MMC_IT_TxFCGC: When Tx good frame counter reaches half the maximum value
*                       - ETH_MMC_IT_TxMCGC: When Tx good multi col counter reaches half the maximum value
*                       - ETH_MMC_IT_TxSCGC: When Tx good single col counter reaches half the maximum value
*                       - ETH_MMC_IT_RxUGFC: When Rx good unicast frames counter reaches half the maximum value
*                       - ETH_MMC_IT_RxAEC : When Rx alignment error counter reaches half the maximum value
*                       - ETH_MMC_IT_RxCEC : When Rx crc error counter reaches half the maximum value
* Output         : None
* Return         : The value of ETHERNET MMC IT (SET or RESET).
*******************************************************************************/
ITStatus ETH_GetMMCITStatus(u32 ETH_MMC_IT)
{
  ITStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_MMC_GET_IT(ETH_MMC_IT));

  if ((ETH_MMC_IT & (u32)0x10000000) != (u32)RESET)
  {
    /* ETHERNET MMC Rx interrupts selected */
    /* Check if the ETHERNET MMC Rx selected interrupt is enabled and occured */
    if ((((ETH_MMC->MMCRIR & ETH_MMC_IT) != (u32)RESET)) && ((ETH_MMC->MMCRIMR & ETH_MMC_IT) != (u32)RESET))
    {
      bitstatus = SET;
    }
    else
    {
      bitstatus = RESET;
    }
  }
  else
  {
    /* ETHERNET MMC Tx interrupts selected */
    /* Check if the ETHERNET MMC Tx selected interrupt is enabled and occured */
    if ((((ETH_MMC->MMCTIR & ETH_MMC_IT) != (u32)RESET)) && ((ETH_MMC->MMCRIMR & ETH_MMC_IT) != (u32)RESET))
    {
      bitstatus = SET;
    }
    else
    {
      bitstatus = RESET;
    }
  }

  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_GetMMCRegister
* Desciption     : Get the specified ETHERNET MMC register value.
* Input          : - ETH_MMCReg: specifies the ETHERNET MMC register.
*                    This parameter can be one of the following values:
*                       - ETH_MMCCR      : MMC CR register
*                       - ETH_MMCRIR     : MMC RIR register
*                       - ETH_MMCTIR     : MMC TIR register
*                       - ETH_MMCRIMR    : MMC RIMR register
*                       - ETH_MMCTIMR    : MMC TIMR register
*                       - ETH_MMCTGFSCCR : MMC TGFSCCR register
*                       - ETH_MMCTGFMSCCR: MMC TGFMSCCR register
*                       - ETH_MMCTGFCR   : MMC TGFCR register
*                       - ETH_MMCRFCECR  : MMC RFCECR register
*                       - ETH_MMCRFAECR  : MMC RFAECR register
*                       - ETH_MMCRGUFCR  : MMC RGUFCRregister
* Output         : None
* Return         : The value of ETHERNET MMC Register value.
*******************************************************************************/
u32 ETH_GetMMCRegister(u32 ETH_MMCReg)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_MMC_REGISTER(ETH_MMCReg));

  /* Return the selected register value */
  return (*(vu32 *)(ETH_MAC_BASE + ETH_MMCReg));
}
#endif /* _ETH_MMC */

/*---------------------------------  PTP  ------------------------------------*/
#ifdef _ETH_PTP

/*******************************************************************************
* Function Name  : ETH_EnablePTPTimeStampAddend
* Desciption     : Updated the PTP block for fine correction with the Time Stamp
*                  Addend register value.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_EnablePTPTimeStampAddend(void)
{
  /* Enable the PTP block update with the Time Stamp Addend register value */
  ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSARU;
}

/*******************************************************************************
* Function Name  : ETH_EnablePTPTimeStampInterruptTrigger
* Desciption     : Enable the PTP Time Stamp interrupt trigger
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_EnablePTPTimeStampInterruptTrigger(void)
{
  /* Enable the PTP target time interrupt */
  ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSITE;
}

/*******************************************************************************
* Function Name  : ETH_EnablePTPTimeStampUpdate
* Desciption     : Updated the PTP system time with the Time Stamp Update register
*                  value.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_EnablePTPTimeStampUpdate(void)
{
  /* Enable the PTP system time update with the Time Stamp Update register value */
  ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSSTU;
}

/*******************************************************************************
* Function Name  : ETH_InitializePTPTimeStamp
* Desciption     : Initialize the PTP Time Stamp
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_InitializePTPTimeStamp(void)
{
  /* Initialize the PTP Time Stamp */
  ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSSTI;
}

/*******************************************************************************
* Function Name  : ETH_PTPUpdateMethodConfig
* Desciption     : Selects the PTP Update method
* Input          : - UpdateMethod: the PTP Update method
*                    This parameter can be one of the following values:
*                       - ETH_PTP_FineUpdate   : Fine Update method
*                       - ETH_PTP_CoarseUpdate : Coarse Update method
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_PTPUpdateMethodConfig(u32 UpdateMethod)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_PTP_UPDATE(UpdateMethod));

  if (UpdateMethod != ETH_PTP_CoarseUpdate)
  {
    /* Enable the PTP Fine Update method */
    ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSFCU;
  }
  else
  {
    /* Disable the PTP Coarse Update method */
    ETH_PTP->PTPTSCR &= (~(u32)ETH_PTPTSCR_TSFCU);
  }
}

/*******************************************************************************
* Function Name  : ETH_PTPTimeStampCmd
* Desciption     : Enables or disables the PTP time stamp for transmit and receive frames.
* Input          : - NewState: new state of the PTP time stamp for transmit and receive frames
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_PTPTimeStampCmd(FunctionalState NewState)
{
  /* Check the parameters */
  eth_assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState != DISABLE)
  {
    /* Enable the PTP time stamp for transmit and receive frames */
    ETH_PTP->PTPTSCR |= ETH_PTPTSCR_TSE;
  }
  else
  {
    /* Disable the PTP time stamp for transmit and receive frames */
    ETH_PTP->PTPTSCR &= (~(u32)ETH_PTPTSCR_TSE);
  }
}

/*******************************************************************************
* Function Name  : ETH_GetPTPFlagStatus
* Desciption     : Checks whether the specified ETHERNET PTP flag is set or not.
* Input          : - ETH_PTP_FLAG: specifies the flag to check.
*                    This parameter can be one of the following values:
*                       - ETH_PTP_FLAG_TSARU : Addend Register Update
*                       - ETH_PTP_FLAG_TSITE : Time Stamp Interrupt Trigger Enable
*                       - ETH_PTP_FLAG_TSSTU : Time Stamp Update
*                       - ETH_PTP_FLAG_TSSTI  : Time Stamp Initialize
* Output         : None
* Return         : The new state of ETHERNET PTP Flag (SET or RESET).
*******************************************************************************/
FlagStatus ETH_GetPTPFlagStatus(u32 ETH_PTP_FLAG)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters */
  eth_assert_param(IS_ETH_PTP_GET_FLAG(ETH_PTP_FLAG));

  if ((ETH_PTP->PTPTSCR & ETH_PTP_FLAG) != (u32)RESET)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : ETH_SetPTPSubSecondIncrement
* Desciption     : Sets the system time Sub-Second Increment value.
* Input          : - SubSecondValue: specifies the PTP Sub-Second Increment Register value.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetPTPSubSecondIncrement(u32 SubSecondValue)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_PTP_SUBSECOND_INCREMENT(SubSecondValue));

  /* Set the PTP Sub-Second Increment Register */
  ETH_PTP->PTPSSIR = SubSecondValue;
}

/*******************************************************************************
* Function Name  : ETH_SetPTPTimeStampUpdate
* Desciption     : Sets the Time Stamp update sign and values.
* Input          : - Sign: specifies the PTP Time update value sign.
*                    This parameter can be one of the following values:
*                       - ETH_PTP_PositiveTime : positive time value.
*                       - ETH_PTP_NegativeTime : negative time value.
*                  - SecondValue: specifies the PTP Time update second value.
*                  - SubSecondValue: specifies the PTP Time update sub-second value.
*                    this is a 31 bit value. bit32 correspond to the sign.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetPTPTimeStampUpdate(u32 Sign, u32 SecondValue, u32 SubSecondValue)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_PTP_TIME_SIGN(Sign));
  eth_assert_param(IS_ETH_PTP_TIME_STAMP_UPDATE_SUBSECOND(SubSecondValue));

  /* Set the PTP Time Update High Register */
  ETH_PTP->PTPTSHUR = SecondValue;

  /* Set the PTP Time Update Low Register with sign */
  ETH_PTP->PTPTSLUR = Sign | SubSecondValue;
}

/*******************************************************************************
* Function Name  : ETH_SetPTPTimeStampAddend
* Desciption     : Sets the Time Stamp Addend value.
* Input          : - Value: specifies the PTP Time Stamp Addend Register value.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetPTPTimeStampAddend(u32 Value)
{
  /* Set the PTP Time Stamp Addend Register */
  ETH_PTP->PTPTSAR = Value;
}

/*******************************************************************************
* Function Name  : ETH_SetPTPTargetTime
* Desciption     : Sets the Target Time registers values.
* Input          : - HighValue: specifies the PTP Target Time High Register value.
*                  - LowValue: specifies the PTP Target Time Low Register value.
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_SetPTPTargetTime(u32 HighValue, u32 LowValue)
{
  /* Set the PTP Target Time High Register */
  ETH_PTP->PTPTTHR = HighValue;
  /* Set the PTP Target Time Low Register */
  ETH_PTP->PTPTTLR = LowValue;
}

/*******************************************************************************
* Function Name  : ETH_GetPTPRegister
* Desciption     : Get the specified ETHERNET PTP register value.
* Input          : - ETH_PTPReg: specifies the ETHERNET PTP register.
*                    This parameter can be one of the following values:
*                       - ETH_PTPTSCR  : Sub-Second Increment Register
*                       - ETH_PTPSSIR  : Sub-Second Increment Register
*                       - ETH_PTPTSHR  : Time Stamp High Register
*                       - ETH_PTPTSLR  : Time Stamp Low Register
*                       - ETH_PTPTSHUR : Time Stamp High Update Register
*                       - ETH_PTPTSLUR : Time Stamp Low Update Register
*                       - ETH_PTPTSAR  : Time Stamp Addend Register
*                       - ETH_PTPTTHR  : Target Time High Register
*                       - ETH_PTPTTLR  : Target Time Low Register
* Output         : None
* Return         : The value of ETHERNET PTP Register value.
*******************************************************************************/
u32 ETH_GetPTPRegister(u32 ETH_PTPReg)
{
  /* Check the parameters */
  eth_assert_param(IS_ETH_PTP_REGISTER(ETH_PTPReg));

  /* Return the selected register value */
  return (*(vu32 *)(ETH_MAC_BASE + ETH_PTPReg));
}

/*******************************************************************************
* Function Name  : ETH_DMAPTPTxDescChainInit
* Desciption     : Initializes the DMA Tx descriptors in chain mode with PTP.
* Input          : - DMATxDescTab: Pointer on the first Tx desc list
*                  - DMAPTPTxDescTab: Pointer on the first PTP Tx desc list
*                  - TxBuff: Pointer on the first TxBuffer list
*                  - TxBuffCount: Number of the used Tx desc in the list
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAPTPTxDescChainInit(ETH_DMADESCTypeDef *DMATxDescTab, ETH_DMADESCTypeDef *DMAPTPTxDescTab, u8* TxBuff, u32 TxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMATxDesc;

  /* Set the DMATxDescToSet pointer with the first one of the DMATxDescTab list */
  DMATxDescToSet = DMATxDescTab;
  DMAPTPTxDescToSet = DMAPTPTxDescTab;

  /* Fill each DMATxDesc descriptor with the right values */
  for(i=0; i < TxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Tx Desc list */
    DMATxDesc = DMATxDescTab+i;

    /* Set Second Address Chained bit and enable PTP */
    DMATxDesc->Status = ETH_DMATxDesc_TCH | ETH_DMATxDesc_TTSE;

    /* Set Buffer1 address pointer */
    DMATxDesc->Buffer1Addr =(u32)(&TxBuff[i*ETH_MAX_PACKET_SIZE]);

    /* Initialize the next descriptor with the Next Desciptor Polling Enable */
    if(i < (TxBuffCount-1))
    {
      /* Set next descriptor address register with next descriptor base address */
      DMATxDesc->Buffer2NextDescAddr = (u32)(DMATxDescTab+i+1);
    }
    else
    {
      /* For last descriptor, set next descriptor address register equal to the first descriptor base address */
      DMATxDesc->Buffer2NextDescAddr = (u32) DMATxDescTab;
    }

	/* make DMAPTPTxDescTab points to the same addresses as DMATxDescTab */
	(&DMAPTPTxDescTab[i])->Buffer1Addr = DMATxDesc->Buffer1Addr;
	(&DMAPTPTxDescTab[i])->Buffer2NextDescAddr = DMATxDesc->Buffer2NextDescAddr;
  }

  /* Store on the last DMAPTPTxDescTab desc status record the first list address */
  (&DMAPTPTxDescTab[i-1])->Status = (u32) DMAPTPTxDescTab;

  /* Set Transmit Desciptor List Address Register */
  ETH_DMA->DMATDLAR = (u32) DMATxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_DMAPTPRxDescChainInit
* Desciption     : Initializes the DMA Rx descriptors in chain mode.
* Input          : - DMARxDescTab: Pointer on the first Rx desc list
*                  - DMAPTPRxDescTab: Pointer on the first PTP Rx desc list
*                  - RxBuff: Pointer on the first RxBuffer list
*                  - RxBuffCount: Number of the used Rx desc in the list
* Output         : None
* Return         : None
*******************************************************************************/
void ETH_DMAPTPRxDescChainInit(ETH_DMADESCTypeDef *DMARxDescTab, ETH_DMADESCTypeDef *DMAPTPRxDescTab, u8 *RxBuff, u32 RxBuffCount)
{
  u32 i = 0;
  ETH_DMADESCTypeDef *DMARxDesc;

  /* Set the DMARxDescToGet pointer with the first one of the DMARxDescTab list */
  DMARxDescToGet = DMARxDescTab;
  DMAPTPRxDescToGet = DMAPTPRxDescTab;

  /* Fill each DMARxDesc descriptor with the right values */
  for(i=0; i < RxBuffCount; i++)
  {
    /* Get the pointer on the ith member of the Rx Desc list */
    DMARxDesc = DMARxDescTab+i;

    /* Set Own bit of the Rx descriptor Status */
    DMARxDesc->Status = ETH_DMARxDesc_OWN;

    /* Set Buffer1 size and Second Address Chained bit */
    DMARxDesc->ControlBufferSize = ETH_DMARxDesc_RCH | (u32)ETH_MAX_PACKET_SIZE;

    /* Set Buffer1 address pointer */
    DMARxDesc->Buffer1Addr = (u32)(&RxBuff[i*ETH_MAX_PACKET_SIZE]);

    /* Initialize the next descriptor with the Next Desciptor Polling Enable */
    if(i < (RxBuffCount-1))
    {
      /* Set next descriptor address register with next descriptor base address */
      DMARxDesc->Buffer2NextDescAddr = (u32)(DMARxDescTab+i+1);
    }
    else
    {
      /* For last descriptor, set next descriptor address register equal to the first descriptor base address */
      DMARxDesc->Buffer2NextDescAddr = (u32)(DMARxDescTab);
    }

	/* Make DMAPTPRxDescTab points to the same addresses as DMARxDescTab */
	(&DMAPTPRxDescTab[i])->Buffer1Addr = DMARxDesc->Buffer1Addr;
	(&DMAPTPRxDescTab[i])->Buffer2NextDescAddr = DMARxDesc->Buffer2NextDescAddr;
  }

  /* Store on the last DMAPTPRxDescTab desc status record the first list address */
  (&DMAPTPRxDescTab[i-1])->Status = (u32) DMAPTPRxDescTab;

  /* Set Receive Desciptor List Address Register */
  ETH_DMA->DMARDLAR = (u32) DMARxDescTab;
}

/*******************************************************************************
* Function Name  : ETH_HandlePTPTxPkt
* Desciption     : Transmits a packet, from application buffer, pointed by ppkt with
*                  Time Stamp values.
* Input          : - ppkt: pointer to application packet Buffer.
*                  - FrameLength: Tx Packet size.
*                  - PTPTxTab: Pointer on the first PTP Tx table to store Time stamp values.
* Output         : None
* Return         : ETH_ERROR: in case of Tx desc owned by DMA
*                  ETH_SUCCESS: for correct transmission
*******************************************************************************/
u32 ETH_HandlePTPTxPkt(u8 *ppkt, u16 FrameLength, u32 *PTPTxTab)
{
  u32 offset = 0, timeout = 0;

  /* Check if the descriptor is owned by the ETHERNET DMA (when set) or CPU (when reset) */
  if((DMATxDescToSet->Status & ETH_DMATxDesc_OWN) != (u32)RESET)
  {
    /* Return ERROR: OWN bit set */
    return ETH_ERROR;
  }

  /* Copy the frame to be sent into memory pointed by the current ETHERNET DMA Tx descriptor */
  for(offset=0; offset<FrameLength; offset++)
  {
    (*(vu8 *)((DMAPTPTxDescToSet->Buffer1Addr) + offset)) = (*(ppkt + offset));
  }

  /* Setting the Frame Length: bits[12:0] */
  DMATxDescToSet->ControlBufferSize = (FrameLength & (u32)0x1FFF);

  /* Setting the last segment and first segment bits (in this case a frame is transmitted in one descriptor) */
  DMATxDescToSet->Status |= ETH_DMATxDesc_LS | ETH_DMATxDesc_FS;

  /* Set Own bit of the Tx descriptor Status: gives the buffer back to ETHERNET DMA */
  DMATxDescToSet->Status |= ETH_DMATxDesc_OWN;

  /* When Tx Buffer unavailable flag is set: clear it and resume transmission */
  if ((ETH_DMA->DMASR & ETH_DMASR_TBUS) != (u32)RESET)
  {
    /* Clear TBUS ETHERNET DMA flag */
    ETH_DMA->DMASR = ETH_DMASR_TBUS;
    /* Resume DMA transmission*/
    ETH_DMA->DMATPDR = 0;
  }

  /* Wait for ETH_DMATxDesc_TTSS flag to be set */
  do
  {
    timeout++;
  } while (!(DMATxDescToSet->Status & ETH_DMATxDesc_TTSS) && (timeout < 0xFFFF));

  /* Return ERROR in case of timeout */
  if(timeout == PHY_READ_TO)
  {
    return ETH_ERROR;
  }

  *PTPTxTab++ = DMATxDescToSet->Buffer1Addr;
  *PTPTxTab = DMATxDescToSet->Buffer2NextDescAddr;

  /* Update the ENET DMA current descriptor */
  /* Chained Mode */
  if((DMATxDescToSet->Status & ETH_DMATxDesc_TCH) != (u32)RESET)
  {
    /* Selects the next DMA Tx descriptor list for next buffer read */
    DMATxDescToSet = (ETH_DMADESCTypeDef*) (DMAPTPTxDescToSet->Buffer2NextDescAddr);

    if(DMAPTPTxDescToSet->Status != 0)
    {
      DMAPTPTxDescToSet = (ETH_DMADESCTypeDef*) (DMAPTPTxDescToSet->Status);
    }
    else
    {
      DMAPTPTxDescToSet++;
    }
  }
  else /* Ring Mode */
  {
    if((DMATxDescToSet->Status & ETH_DMATxDesc_TER) != (u32)RESET)
    {
      /* Selects the next DMA Tx descriptor list for next buffer read: this will
         be the first Tx descriptor in this case */
      DMATxDescToSet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMATDLAR);
      DMAPTPTxDescToSet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMATDLAR);
    }
    else
    {
      /* Selects the next DMA Tx descriptor list for next buffer read */
      DMATxDescToSet = (ETH_DMADESCTypeDef*) ((u32)DMATxDescToSet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
      DMAPTPTxDescToSet = (ETH_DMADESCTypeDef*) ((u32)DMAPTPTxDescToSet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
    }
  }

  /* Return SUCCESS */
  return ETH_SUCCESS;
}

/*******************************************************************************
* Function Name  : ETH_HandlePTPRxPkt
* Desciption     : Receives a packet and copies it to memory pointed by ppkt with
*                 Time Stamp values.
* Input          : - PTPRxTab: Pointer on the first PTP Rx table to store Time stamp values.
* Output         : ppkt: pointer on application receive buffer.
* Return         : ETH_ERROR: if there is error in reception
*                  Received packet size: if packet reception is correct
*******************************************************************************/
u32 ETH_HandlePTPRxPkt(u8 *ppkt, u32 *PTPRxTab)
{
  u32 offset = 0, FrameLength = 0;

  /* Check if the descriptor is owned by the ENET or CPU */
  if((DMARxDescToGet->Status & ETH_DMARxDesc_OWN) != (u32)RESET)
  {
    /* Return error: OWN bit set */
    return ETH_ERROR;
  }

  if(((DMARxDescToGet->Status & ETH_DMARxDesc_ES) == (u32)RESET) &&
     ((DMARxDescToGet->Status & ETH_DMARxDesc_LS) != (u32)RESET) &&
     ((DMARxDescToGet->Status & ETH_DMARxDesc_FS) != (u32)RESET))
  {
    /* Get the Frame Length of the received packet: substruct 4 bytes of the CRC */
    FrameLength = ((DMARxDescToGet->Status & ETH_DMARxDesc_FL) >> ETH_DMARxDesc_FrameLengthShift) - 4;

    /* Copy the received frame into buffer from memory pointed by the current ETHERNET DMA Rx descriptor */
    for(offset=0; offset<FrameLength; offset++)
    {
      (*(ppkt + offset)) = (*(vu8 *)((DMAPTPRxDescToGet->Buffer1Addr) + offset));
    }
  }
  else
  {
    /* Return ERROR */
    FrameLength = ETH_ERROR;
  }

  /* When Rx Buffer unavailable flag is set: clear it and resume reception */
  if ((ETH_DMA->DMASR & ETH_DMASR_RBUS) != (u32)RESET)
  {
    /* Clear RBUS ETHERNET DMA flag */
    ETH_DMA->DMASR = ETH_DMASR_RBUS;
    /* Resume DMA reception */
    ETH_DMA->DMARPDR = 0;
  }

  *PTPRxTab++ = DMARxDescToGet->Buffer1Addr;
  *PTPRxTab = DMARxDescToGet->Buffer2NextDescAddr;

  /* Set Own bit of the Rx descriptor Status: gives the buffer back to ETHERNET DMA */
  DMARxDescToGet->Status |= ETH_DMARxDesc_OWN;

  /* Update the ETHERNET DMA global Rx descriptor with next Rx decriptor */
  /* Chained Mode */
  if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RCH) != (u32)RESET)
  {
    /* Selects the next DMA Rx descriptor list for next buffer read */
    DMARxDescToGet = (ETH_DMADESCTypeDef*) (DMAPTPRxDescToGet->Buffer2NextDescAddr);

    if(DMAPTPRxDescToGet->Status != 0)
    {
      DMAPTPRxDescToGet = (ETH_DMADESCTypeDef*) (DMAPTPRxDescToGet->Status);
    }
    else
    {
      DMAPTPRxDescToGet++;
    }
  }
  else /* Ring Mode */
  {
    if((DMARxDescToGet->ControlBufferSize & ETH_DMARxDesc_RER) != (u32)RESET)
    {
      /* Selects the first DMA Rx descriptor for next buffer to read: last Rx descriptor was used */
      DMARxDescToGet = (ETH_DMADESCTypeDef*) (ETH_DMA->DMARDLAR);
    }
    else
    {
      /* Selects the next DMA Rx descriptor list for next buffer to read */
      DMARxDescToGet = (ETH_DMADESCTypeDef*) ((u32)DMARxDescToGet + 0x10 + ((ETH_DMA->DMABMR & ETH_DMABMR_DSL) >> 2));
    }
  }

  /* Return Frame Length/ERROR */
  return (FrameLength);
}

#endif /* _ETH_PTP */

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/