[STM32. USARTv2] Added synchronous API support for timeout feature.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9714 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/hal/include/hal_uart.h

@@ -185,6 +185,23 @@ typedef enum {
 #define _uart_wakeup_rx_error_isr(uartp)
 #endif /* !UART_USE_WAIT */
 
+#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief   Wakes up the waiting thread in case of RX timeout.
+ *
+ * @param[in] uartp     pointer to the @p UARTDriver object
+ *
+ * @notapi
+ */
+#define _uart_wakeup_rx_timeout_isr(uartp) {                                \
+  osalSysLockFromISR();                                                     \
+  osalThreadResumeI(&(uartp)->threadrx, MSG_TIMEOUT);                       \
+  osalSysUnlockFromISR();                                                   \
+}
+#else /* !UART_USE_WAIT */
+#define _uart_wakeup_rx_timeout_isr(uartp)
+#endif /* !UART_USE_WAIT */
+
 /**
  * @brief   Common ISR code for early TX.
  * @details This code handles the portable part of the ISR code:
@@ -314,8 +331,10 @@ typedef enum {
  * @notapi
  */
 #define _uart_timeout_isr_code(uartp) {                                     \
-  if ((uartp)->config->timeout_cb != NULL)                                  \
+  if ((uartp)->config->timeout_cb != NULL) {                                \
     (uartp)->config->timeout_cb(uartp);                                     \
+  }                                                                         \
+  _uart_wakeup_rx_timeout_isr(uartp);                                       \
 }
 
 /** @} */

os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.h

@@ -587,11 +587,13 @@ typedef struct {
   /* End of the mandatory fields.*/
   /**
    * @brief   Receiver timeout callback.
+   * @details Handles both idle and timeout interrupts depending on configured
+   *          flags in CR registers and supported hardware features.
    */
   uartcb_t                  timeout_cb;
   /**
    * @brief   Receiver timeout value in terms of number of bit duration.
-   * @details Set it to 0 when you want to handle IDLE interrupt instead of
+   * @details Set it to 0 when you want to handle idle interrupt instead of
    *          hardware timeout.
    */
   uint32_t                  timeout;