discovery-stm32f072: Initial working version

This version of the EC firmware just provides a console and some
blinking lights for the stm32f0 discovery board.  This is a
convenient board to work with for peripheral bringup.

Signed-off-by: Anton Staaf <robotboy@chromium.org>

BRANCH=none
TEST=make buildall -j

Change-Id: I9ae87235e8a505d58fa7a5c996528c4dd6c3f2ac
Reviewed-on: https://chromium-review.googlesource.com/207130
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
Tested-by: Anton Staaf <robotboy@chromium.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/board/discovery-stm32f072/board.c b/board/discovery-stm32f072/board.c
new file mode 100644
index 0000000000..546b07d8d9
--- /dev/null
+++ b/board/discovery-stm32f072/board.c
@@ -0,0 +1,41 @@
+/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+/* STM32F072-discovery board configuration */
+
+#include "common.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "registers.h"
+#include "task.h"
+#include "util.h"
+
+void button_event(enum gpio_signal signal);
+
+#include "gpio_list.h"
+
+void button_event(enum gpio_signal signal)
+{
+	static int count = 0;
+
+	gpio_set_level(GPIO_LED_U, (count & 0x03) == 0);
+	gpio_set_level(GPIO_LED_R, (count & 0x03) == 1);
+	gpio_set_level(GPIO_LED_D, (count & 0x03) == 2);
+	gpio_set_level(GPIO_LED_L, (count & 0x03) == 3);
+
+	count++;
+}
+
+/* Initialize board. */
+static void board_init(void)
+{
+	gpio_enable_interrupt(GPIO_USER_BUTTON);
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
+
+/* Pins with alternate functions */
+const struct gpio_alt_func gpio_alt_funcs[] = {
+	{GPIO_A, 0xC000, 1, MODULE_UART}, /* USART2: PA14/PA15 */
+};
+const int gpio_alt_funcs_count = ARRAY_SIZE(gpio_alt_funcs);