ChibiOS 2.6.8, until I can figure out where to get it from git.

firmware/chibios/testhal/STM32L1xx/UART/main.c

@@ -0,0 +1,144 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+static VirtualTimer vt1, vt2;
+
+static void restart(void *p) {
+
+  (void)p;
+
+  chSysLockFromIsr();
+  uartStartSendI(&UARTD1, 14, "Hello World!\r\n");
+  chSysUnlockFromIsr();
+}
+
+static void ledoff(void *p) {
+
+  (void)p;
+  palClearPad(GPIOB, GPIOB_LED4);
+}
+
+/*
+ * This callback is invoked when a transmission buffer has been completely
+ * read by the driver.
+ */
+static void txend1(UARTDriver *uartp) {
+
+  (void)uartp;
+  palSetPad(GPIOB, GPIOB_LED4);
+}
+
+/*
+ * This callback is invoked when a transmission has physically completed.
+ */
+static void txend2(UARTDriver *uartp) {
+
+  (void)uartp;
+  palClearPad(GPIOB, GPIOB_LED4);
+  chSysLockFromIsr();
+  if (chVTIsArmedI(&vt1))
+    chVTResetI(&vt1);
+  chVTSetI(&vt1, MS2ST(5000), restart, NULL);
+  chSysUnlockFromIsr();
+}
+
+/*
+ * This callback is invoked on a receive error, the errors mask is passed
+ * as parameter.
+ */
+static void rxerr(UARTDriver *uartp, uartflags_t e) {
+
+  (void)uartp;
+  (void)e;
+}
+
+/*
+ * This callback is invoked when a character is received but the application
+ * was not ready to receive it, the character is passed as parameter.
+ */
+static void rxchar(UARTDriver *uartp, uint16_t c) {
+
+  (void)uartp;
+  (void)c;
+  /* Flashing the LED each time a character is received.*/
+  palSetPad(GPIOB, GPIOB_LED4);
+  chSysLockFromIsr();
+  if (chVTIsArmedI(&vt2))
+    chVTResetI(&vt2);
+  chVTSetI(&vt2, MS2ST(200), ledoff, NULL);
+  chSysUnlockFromIsr();
+}
+
+/*
+ * This callback is invoked when a receive buffer has been completely written.
+ */
+static void rxend(UARTDriver *uartp) {
+
+  (void)uartp;
+}
+
+/*
+ * UART driver configuration structure.
+ */
+static UARTConfig uart_cfg_1 = {
+  txend1,
+  txend2,
+  rxend,
+  rxchar,
+  rxerr,
+  38400,
+  0,
+  USART_CR2_LINEN,
+  0
+};
+
+/*
+ * Application entry point.
+ */
+int main(void) {
+
+  /*
+   * System initializations.
+   * - HAL initialization, this also initializes the configured device drivers
+   *   and performs the board-specific initializations.
+   * - Kernel initialization, the main() function becomes a thread and the
+   *   RTOS is active.
+   */
+  halInit();
+  chSysInit();
+
+  /*
+   * Activates the serial driver 1, PA9 and PA10 are routed to USART1.
+   */
+  uartStart(&UARTD1, &uart_cfg_1);
+  palSetPadMode(GPIOA, 9, PAL_MODE_ALTERNATE(7));
+  palSetPadMode(GPIOA, 10, PAL_MODE_ALTERNATE(7));
+
+  /*
+   * Starts the transmission, it will be handled entirely in background.
+   */
+  uartStartSend(&UARTD1, 13, "Starting...\r\n");
+
+  /*
+   * Normal main() thread activity, in this demo it does nothing.
+   */
+  while (TRUE) {
+    chThdSleepMilliseconds(500);
+  }
+}