From 8a03162059ef38a1339672eaa911190595e707bc Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Tue, 1 Sep 2020 12:58:25 +0000
Subject: [PATCH] git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@13826
 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

---
 os/hal/include/hal_sio.h                     | 10 ++++++++
 os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.c | 14 ++++++++++++
 os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.h |  6 +++++
 os/hal/src/hal_sio.c                         | 24 +++++++++++++++++++-
 4 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/os/hal/include/hal_sio.h b/os/hal/include/hal_sio.h
index faf12b9ca..38de473bd 100644
--- a/os/hal/include/hal_sio.h
+++ b/os/hal/include/hal_sio.h
@@ -255,6 +255,16 @@ struct hal_sio_operation {
  */
 #define sioIsTXFullX(siop) sio_lld_is_tx_full(siop)
 
+/**
+ * @brief   Return the pending SIO events flags.
+ *
+ * @param[in] siop      pointer to the @p SIODriver object
+ * @return              The pending event flags.
+ *
+ * @iclass
+ */
+#define sioGetAndClearEventsI(siop) sio_lld_get_and_clear_events(siop)
+
 /**
  * @brief   Returns one frame from the RX FIFO.
  * @note    If the FIFO is empty then the returned value is unpredictable.
diff --git a/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.c b/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.c
index 4cd2b921f..7422e29f4 100644
--- a/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.c
+++ b/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.c
@@ -501,6 +501,20 @@ void sio_lld_stop_operation(SIODriver *siop) {
   siop->usart->CR3 &= USART_CR3_CFG_FORBIDDEN;
 }
 
+/**
+ * @brief   Return the pending SIO events flags.
+ *
+ * @param[in] siop      pointer to the @p SIODriver object
+ * @return              The pending event flags.
+ *
+ * @notapi
+ */
+sio_events_mask_t sio_lld_get_and_clear_events(SIODriver *siop) {
+  sio_events_mask_t evtmask = 0U;
+
+  return evtmask;
+}
+
 /**
  * @brief   Reads data from the RX FIFO.
  * @details The function is not blocking, it writes frames until there
diff --git a/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.h b/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.h
index a4c536dae..981c2443c 100644
--- a/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.h
+++ b/os/hal/ports/STM32/LLD/USARTv2/hal_sio_lld.h
@@ -224,6 +224,11 @@
 /* Driver macros.                                                            */
 /*===========================================================================*/
 
+/**
+ * @brief   Type of a SIO events mask.
+ */
+typedef uint32_t sio_events_mask_t;
+
 /**
  * @brief   Low level fields of the SIO driver structure.
  */
@@ -335,6 +340,7 @@ extern "C" {
   void sio_lld_stop(SIODriver *siop);
   void sio_lld_start_operation(SIODriver *siop);
   void sio_lld_stop_operation(SIODriver *siop);
+  sio_events_mask_t sio_lld_get_and_clear_events(SIODriver *siop);
   size_t sio_lld_read(SIODriver *siop, uint8_t *buffer, size_t n);
   size_t sio_lld_write(SIODriver *siop, const uint8_t *buffer, size_t n);
   msg_t sio_lld_get(SIODriver *siop);
diff --git a/os/hal/src/hal_sio.c b/os/hal/src/hal_sio.c
index aaa813857..19bac54a2 100644
--- a/os/hal/src/hal_sio.c
+++ b/os/hal/src/hal_sio.c
@@ -335,6 +335,28 @@ void sioStopOperation(SIODriver *siop) {
   osalSysUnlock();
 }
 
+/**
+ * @brief   Return the pending SIO events flags.
+ *
+ * @param[in] siop      pointer to the @p SIODriver object
+ * @return              The pending event flags.
+ *
+ * @api
+ */
+sio_events_mask_t sioGetAndClearEvents(SIODriver *siop) {
+  sio_events_mask_t evtmask;
+
+  osalDbgCheck(siop != NULL);
+
+  osalSysLock();
+
+  evtmask = sioGetAndClearEventsI(siop);
+
+  osalSysUnlock();
+
+  return evtmask;
+}
+
 /**
  * @brief   Reads data from the RX FIFO.
  * @details This function is non-blocking, data is read if present and the
@@ -351,7 +373,7 @@ void sioStopOperation(SIODriver *siop) {
  */
 size_t sioAsyncRead(SIODriver *siop, uint8_t *buffer, size_t n) {
 
-  osalDbgCheck((siop != NULL) && (buffer));
+  osalDbgCheck((siop != NULL) && (buffer != NULL));
 
   osalSysLock();