Added Character Matched Callback for UART

Author: ClemensElflein

ext/ChibiOS_21.11.3/os/hal/ports/STM32/LLD/USARTv3/hal_uart_lld.c

@@ -1217,6 +1217,10 @@ void uart_lld_serve_interrupt(UARTDriver *uartp) {
   isr = u->ISR;
   u->ICR = isr;
 
+  if (isr & USART_ISR_CMF) {
+    _uart_rx_char_match_isr_code(uartp);
+  }
+
   if (isr & (USART_ISR_LBDF | USART_ISR_ORE | USART_ISR_NE |
              USART_ISR_FE   | USART_ISR_PE)) {
     _uart_rx_error_isr_code(uartp, translate_errors(isr));

ext/ChibiOS_21.11.3/os/hal/ports/STM32/LLD/USARTv3/hal_uart_lld.h

@@ -894,6 +894,10 @@ typedef struct hal_uart_config {
    *          flags in CR registers and supported hardware features.
    */
   uartcb_t                  timeout_cb;
+  /**
+   * @brief Character Received callback.
+   */
+  uartcb_t                  rx_cm_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