From 0c9f553e4fed400108f90f1504e88d1882c097e6 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sun, 6 May 2018 14:56:30 +0000
Subject: Char match support in UART driver.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@12009 110e8d01-0319-4d1e-a829-52ad28d1bb01
---
 os/hal/include/hal_uart.h | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'os')

diff --git a/os/hal/include/hal_uart.h b/os/hal/include/hal_uart.h
index a0683592c..9e5d2a373 100644
--- a/os/hal/include/hal_uart.h
+++ b/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 character match.
+ *
+ * @param[in] uartp     pointer to the @p UARTDriver object
+ *
+ * @notapi
+ */
+#define _uart_wakeup_rx_cm_isr(uartp) {                                     \
+  osalSysLockFromISR();                                                     \
+  osalThreadResumeI(&(uartp)->threadrx, MSG_TIMEOUT);                       \
+  osalSysUnlockFromISR();                                                   \
+}
+#else /* !UART_USE_WAIT */
+#define _uart_wakeup_rx_cm_isr(uartp)
+#endif /* !UART_USE_WAIT */
+
 #if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
 /**
  * @brief   Wakes up the waiting thread in case of RX timeout.
@@ -336,6 +353,27 @@ typedef enum {
   _uart_wakeup_rx_timeout_isr(uartp);                                       \
 }
 
+/**
+ * @brief   Character match ISR code for receiver.
+ * @details This code handles the portable part of the ISR code:
+ *          - Callback invocation.
+ *          - Waiting thread wakeup, if any.
+ *          - Driver state transitions.
+ *          .
+ * @note    This macro is meant to be used in the low level drivers
+ *          implementation only.
+ *
+ * @param[in] uartp     pointer to the @p UARTDriver object
+ *
+ * @notapi
+ */
+#define _uart_rx_char_match_isr_code(uartp) {                               \
+  if ((uartp)->config->rx_cm_cb != NULL) {                                  \
+    (uartp)->config->rx_cm_cb(uartp);                                       \
+  }                                                                         \
+  _uart_wakeup_rx_cm_isr(uartp);                                            \
+}
+
 /** @} */
 
 /*===========================================================================*/
-- 
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