[HAL][IRDA] Add const qualifier for read only pointers

Inc/stm32l1xx_hal_irda.h

diff --git a/Inc/stm32l1xx_hal_irda.h b/Inc/stm32l1xx_hal_irda.h
index be3b7f0..d69b350 100644
--- a/Inc/stm32l1xx_hal_irda.h
+++ b/Inc/stm32l1xx_hal_irda.h
@@ -144,7 +144,7 @@
 
   IRDA_InitTypeDef            Init;             /*!<  IRDA communication parameters      */
 
-  uint8_t                     *pTxBuffPtr;      /*!<  Pointer to IRDA Tx transfer Buffer */
+  const uint8_t               *pTxBuffPtr;      /*!<  Pointer to IRDA Tx transfer Buffer */
 
   uint16_t                    TxXferSize;       /*!<  IRDA Tx Transfer size              */
 
@@ -559,11 +559,11 @@
   * @{
   */
 /* IO operation functions *******************************************************/
-HAL_StatusTypeDef HAL_IRDA_Transmit(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size, uint32_t Timeout);
+HAL_StatusTypeDef HAL_IRDA_Transmit(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size, uint32_t Timeout);
 HAL_StatusTypeDef HAL_IRDA_Receive(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size, uint32_t Timeout);
-HAL_StatusTypeDef HAL_IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size);
+HAL_StatusTypeDef HAL_IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size);
 HAL_StatusTypeDef HAL_IRDA_Receive_IT(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size);
-HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size);
+HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size);
 HAL_StatusTypeDef HAL_IRDA_Receive_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size);
 HAL_StatusTypeDef HAL_IRDA_DMAPause(IRDA_HandleTypeDef *hirda);
 HAL_StatusTypeDef HAL_IRDA_DMAResume(IRDA_HandleTypeDef *hirda);

Src/stm32l1xx_hal_irda.c

diff --git a/Src/stm32l1xx_hal_irda.c b/Src/stm32l1xx_hal_irda.c
index b9672c4..d7189ba 100644
--- a/Src/stm32l1xx_hal_irda.c
+++ b/Src/stm32l1xx_hal_irda.c
@@ -768,9 +768,9 @@
   * @param Timeout Specify timeout value.
   * @retval HAL status
   */
-HAL_StatusTypeDef HAL_IRDA_Transmit(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size, uint32_t Timeout)
+HAL_StatusTypeDef HAL_IRDA_Transmit(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size, uint32_t Timeout)
 {
-  uint16_t *tmp;
+  const uint16_t *tmp;
   uint32_t tickstart = 0U;
 
   /* Check that a Tx process is not already ongoing */
@@ -801,7 +801,7 @@
         {
           return HAL_TIMEOUT;
         }
-        tmp = (uint16_t *) pData;
+        tmp = (const uint16_t *) pData;
         hirda->Instance->DR = (*tmp & (uint16_t)0x01FF);
         if (hirda->Init.Parity == IRDA_PARITY_NONE)
         {
@@ -943,7 +943,7 @@
   * @param Size  Amount of data elements (u8 or u16) to be sent.
   * @retval HAL status
   */
-HAL_StatusTypeDef HAL_IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)
+HAL_StatusTypeDef HAL_IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size)
 {
   /* Check that a Tx process is not already ongoing */
   if (hirda->gState == HAL_IRDA_STATE_READY)
@@ -1036,9 +1036,9 @@
   * @param Size  Amount of data elements (u8 or u16) to be sent.
   * @retval HAL status
   */
-HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)
+HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size)
 {
-  uint32_t *tmp;
+  const uint32_t *tmp;
 
   /* Check that a Tx process is not already ongoing */
   if (hirda->gState == HAL_IRDA_STATE_READY)
@@ -1071,8 +1071,8 @@
     hirda->hdmatx->XferAbortCallback = NULL;
 
     /* Enable the IRDA transmit DMA channel */
-    tmp = (uint32_t *)&pData;
-    HAL_DMA_Start_IT(hirda->hdmatx, *(uint32_t *)tmp, (uint32_t)&hirda->Instance->DR, Size);
+    tmp = (const uint32_t *)&pData;
+    HAL_DMA_Start_IT(hirda->hdmatx, *(const uint32_t *)tmp, (uint32_t)&hirda->Instance->DR, Size);
 
     /* Clear the TC flag in the SR register by writing 0 to it */
     __HAL_IRDA_CLEAR_FLAG(hirda, IRDA_FLAG_TC);
@@ -2453,14 +2453,14 @@
  */
 static HAL_StatusTypeDef IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda)
 {
-  uint16_t *tmp;
+  const uint16_t *tmp;
 
   /* Check that a Tx process is ongoing */
   if (hirda->gState == HAL_IRDA_STATE_BUSY_TX)
   {
     if (hirda->Init.WordLength == IRDA_WORDLENGTH_9B)
     {
-      tmp = (uint16_t *) hirda->pTxBuffPtr;
+      tmp = (const uint16_t *) hirda->pTxBuffPtr;
       hirda->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FF);
       if (hirda->Init.Parity == IRDA_PARITY_NONE)
       {