diff --git a/Inc/stm32f3xx_hal_irda.h b/Inc/stm32f3xx_hal_irda.h
index 5363328..ca76a38 100644
--- a/Inc/stm32f3xx_hal_irda.h
+++ b/Inc/stm32f3xx_hal_irda.h
@@ -140,7 +140,7 @@
 
   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              */
 
@@ -788,11 +788,11 @@
   */
 
 /* 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);
@@ -826,8 +826,8 @@
   */
 
 /* Peripheral State and Error functions ***************************************/
-HAL_IRDA_StateTypeDef HAL_IRDA_GetState(IRDA_HandleTypeDef *hirda);
-uint32_t              HAL_IRDA_GetError(IRDA_HandleTypeDef *hirda);
+HAL_IRDA_StateTypeDef HAL_IRDA_GetState(const IRDA_HandleTypeDef *hirda);
+uint32_t              HAL_IRDA_GetError(const IRDA_HandleTypeDef *hirda);
 
 /**
   * @}
diff --git a/Src/stm32f3xx_hal_irda.c b/Src/stm32f3xx_hal_irda.c
index 9a397f3..3746c5e 100644
--- a/Src/stm32f3xx_hal_irda.c
+++ b/Src/stm32f3xx_hal_irda.c
@@ -809,10 +809,10 @@
   * @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)
 {
-  uint8_t  *pdata8bits;
-  uint16_t *pdata16bits;
+  const uint8_t  *pdata8bits;
+  const uint16_t *pdata16bits;
   uint32_t tickstart;
 
   /* Check that a Tx process is not already ongoing */
@@ -839,7 +839,7 @@
     if ((hirda->Init.WordLength == IRDA_WORDLENGTH_9B) && (hirda->Init.Parity == IRDA_PARITY_NONE))
     {
       pdata8bits  = NULL;
-      pdata16bits = (uint16_t *) pData; /* Derogation R.11.3 */
+      pdata16bits = (const uint16_t *) pData; /* Derogation R.11.3 */
     }
     else
     {
@@ -988,7 +988,7 @@
   * @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)
@@ -1085,7 +1085,7 @@
   * @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)
 {
   /* Check that a Tx process is not already ongoing */
   if (hirda->gState == HAL_IRDA_STATE_READY)
@@ -2184,7 +2184,7 @@
   *                the configuration information for the specified IRDA module.
   * @retval HAL state
   */
-HAL_IRDA_StateTypeDef HAL_IRDA_GetState(IRDA_HandleTypeDef *hirda)
+HAL_IRDA_StateTypeDef HAL_IRDA_GetState(const IRDA_HandleTypeDef *hirda)
 {
   /* Return IRDA handle state */
   uint32_t temp1;
@@ -2201,7 +2201,7 @@
   *               the configuration information for the specified IRDA module.
   * @retval IRDA Error Code
   */
-uint32_t HAL_IRDA_GetError(IRDA_HandleTypeDef *hirda)
+uint32_t HAL_IRDA_GetError(const IRDA_HandleTypeDef *hirda)
 {
   return hirda->ErrorCode;
 }
@@ -2771,7 +2771,7 @@
   */
 static void 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)
@@ -2788,7 +2788,7 @@
     {
       if ((hirda->Init.WordLength == IRDA_WORDLENGTH_9B) && (hirda->Init.Parity == IRDA_PARITY_NONE))
       {
-        tmp = (uint16_t *) hirda->pTxBuffPtr; /* Derogation R.11.3 */
+        tmp = (const uint16_t *) hirda->pTxBuffPtr; /* Derogation R.11.3 */
         hirda->Instance->TDR = (uint16_t)(*tmp & 0x01FFU);
         hirda->pTxBuffPtr += 2U;
       }