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/**********************************************************************
* Minolta Dimage V digital camera communication library *
* Copyright (C) 2000,2001 Gus Hartmann *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of *
* the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 59 Temple Place, Suite 330, *
* Boston, MA 02111-1307 USA *
* *
**********************************************************************/
/* $Id$ */
#include <config.h>
#include "dimagev.h"
#define GP_MODULE "dimagev"
/* This is the parent function, who calls most of the functions below.
It returns GP_ERROR if it cannot get the camera data, and GP_OK otherwise.
The subroutines will print out more detained information should they fail.
*/
int dimagev_get_camera_status(dimagev_t *dimagev) {
dimagev_packet *p, *raw;
unsigned char char_buffer;
/* Check the device. */
if ( dimagev->dev == NULL ) {
GP_DEBUG( "dimagev_get_camera_status::device not valid");
return GP_ERROR_BAD_PARAMETERS;
}
/* Let's say hello and get the current status. */
if ( ( p = dimagev_make_packet(DIMAGEV_GET_STATUS, 1, 0)) == NULL ) {
GP_DEBUG( "dimagev_get_camera_status::unable to allocate packet");
return GP_ERROR_IO;
}
if ( gp_port_write(dimagev->dev, p->buffer, p->length) < GP_OK ) {
GP_DEBUG( "dimagev_get_camera_status::unable to write packet");
free(p);
return GP_ERROR_IO;
} else if ( gp_port_read(dimagev->dev, &char_buffer, 1) < GP_OK ) {
GP_DEBUG( "dimagev_get_camera_status::no response from camera");
free(p);
return GP_ERROR_IO;
}
free(p);
switch ( char_buffer ) {
case DIMAGEV_ACK:
break;
case DIMAGEV_NAK:
GP_DEBUG( "dimagev_get_camera_status::camera did not acknowledge transmission");
return dimagev_get_camera_status(dimagev);
/* return GP_ERROR_IO;*/
case DIMAGEV_CAN:
GP_DEBUG( "dimagev_get_camera_status::camera cancels transmission");
return GP_ERROR_IO;
default:
GP_DEBUG( "dimagev_get_camera_status::camera responded with unknown value %x", char_buffer);
return GP_ERROR_IO;
}
if ( ( p = dimagev_read_packet(dimagev) ) == NULL ) {
GP_DEBUG( "dimagev_get_camera_status::unable to read packet");
return GP_ERROR_IO;
}
char_buffer = DIMAGEV_EOT;
if ( gp_port_write(dimagev->dev, &char_buffer, 1) < GP_OK ) {
GP_DEBUG( "dimagev_get_camera_status::unable to send EOT");
free(p);
return GP_ERROR_IO;
}
if ( gp_port_read(dimagev->dev, &char_buffer, 1) < GP_OK ) {
GP_DEBUG( "dimagev_get_camera_status::no response from camera");
free(p);
return GP_ERROR_IO;
}
switch ( char_buffer ) {
case DIMAGEV_ACK:
break;
case DIMAGEV_NAK:
GP_DEBUG( "dimagev_get_camera_status::camera did not acknowledge transmission");
free(p);
return GP_ERROR_IO;
case DIMAGEV_CAN:
GP_DEBUG( "dimagev_get_camera_status::camera cancels transmission");
free(p);
return GP_ERROR_IO;
default:
GP_DEBUG( "dimagev_get_camera_status::camera responded with unknown value %x", char_buffer);
free(p);
return GP_ERROR_IO;
}
if ( ( raw = dimagev_strip_packet(p) ) == NULL ) {
GP_DEBUG( "dimagev_get_camera_status::unable to strip data packet");
free(p);
return GP_ERROR;
}
free(p);
if ( ( dimagev->status = dimagev_import_camera_status(raw->buffer) ) == NULL ) {
GP_DEBUG( "dimagev_get_camera_status::unable to read camera status");
free(raw);
return GP_ERROR;
}
free(raw);
return GP_OK;
}
/* This function converts a few chars of data, such as is given by the camera
to indicate status, and massages it into a dimagev_status_t.
*/
dimagev_status_t *dimagev_import_camera_status(unsigned char *raw_data) {
dimagev_status_t *processed_data;
if ( raw_data == NULL ) {
return NULL;
}
if ( ( processed_data = malloc(sizeof(dimagev_status_t)) ) == NULL ) {
return NULL;
}
processed_data->battery_level = raw_data[0];
processed_data->number_images = ( raw_data[1] * 256 ) + ( raw_data[2] );
processed_data->minimum_images_can_take = ( raw_data[3] * 256 ) + ( raw_data[4] );
processed_data->busy = ( raw_data[5] & 0x40 ) >> 6;
processed_data->flash_charging = ( raw_data[5] & 0x10 ) >> 4;
processed_data->lens_status = ( raw_data[5] & 0x0c ) >> 2 ;
processed_data->card_status = ( raw_data[5] & 0x03 );
processed_data->id_number = raw_data[6];
return processed_data;
}
/* This is a fairly simple dump function, using the GPIO debug funtions. It
just prints the current status to stderr in a reasonably readable format.
*/
void dimagev_dump_camera_status(dimagev_status_t *status) {
if ( status == NULL ) {
GP_DEBUG( "Unable to dump NULL status");
return;
}
GP_DEBUG( "========= Begin Camera Status =========");
GP_DEBUG( "Battery level: %d", status->battery_level);
GP_DEBUG( "Number of images: %d", status->number_images);
GP_DEBUG( "Minimum images remaining: %d", status->minimum_images_can_take);
GP_DEBUG( "Busy: %s ( %d )", status->busy != (unsigned char) 0 ? "Busy" : "Not Busy", status->busy);
GP_DEBUG( "Flash charging: %s ( %d )", status->flash_charging != (unsigned char) 0 ? "Charging" : "Ready", status->flash_charging);
GP_DEBUG( "Lens status: ");
switch ( status->lens_status ) {
case 0:
GP_DEBUG( "Normal ( 0 )");
break;
case 1: case 2:
GP_DEBUG( "Lens direction does not match flash light ( %d )", status->lens_status );
break;
case 3:
GP_DEBUG( "Lens is not attached ( 3 )");
break;
default:
GP_DEBUG( "Bad value for lens status ( %d )", status->lens_status);
break;
}
GP_DEBUG( "Card status: ");
switch ( status->card_status ) {
case 0:
GP_DEBUG( "Normal ( 0 )");
break;
case 1:
GP_DEBUG( "Full ( 1 )");
break;
case 2:
GP_DEBUG( "Write-protected ( 2 )");
break;
case 3:
GP_DEBUG( "Card not valid for this camera ( 3 )");
break;
default:
GP_DEBUG( "Invalid value for card status ( %d )", status->card_status);
break;
}
GP_DEBUG( "Card ID Data: %02x", status->id_number);
GP_DEBUG( "========== End Camera Status ==========");
return;
}
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