[HAL][FMC] Add a volatile qualifier when retrieving data to avoid compiler optimization and ensure data reads correctly

Author: KRASTM

Src/stm32h7xx_hal_nand.c

@@ -637,7 +637,7 @@ HAL_StatusTypeDef HAL_NAND_Read_Page_8b(NAND_HandleTypeDef *hnand, const NAND_Ad
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.PageSize; index++)
       {
-        *buff = *(uint8_t *)deviceaddress;
+        *buff = *(__IO uint8_t *)deviceaddress;
         buff++;
       }
 
@@ -805,7 +805,7 @@ HAL_StatusTypeDef HAL_NAND_Read_Page_16b(NAND_HandleTypeDef *hnand, const NAND_A
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.PageSize; index++)
       {
-        *buff = *(uint16_t *)deviceaddress;
+        *buff = *(__IO uint16_t *)deviceaddress;
         buff++;
       }
 
@@ -1287,7 +1287,7 @@ HAL_StatusTypeDef HAL_NAND_Read_SpareArea_8b(NAND_HandleTypeDef *hnand, const NA
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.SpareAreaSize; index++)
       {
-        *buff = *(uint8_t *)deviceaddress;
+        *buff = *(__IO uint8_t *)deviceaddress;
         buff++;
       }
 
@@ -1452,7 +1452,7 @@ HAL_StatusTypeDef HAL_NAND_Read_SpareArea_16b(NAND_HandleTypeDef *hnand, const N
       /* Get Data into Buffer */
       for (index = 0U; index < hnand->Config.SpareAreaSize; index++)
       {
-        *buff = *(uint16_t *)deviceaddress;
+        *buff = *(__IO uint16_t *)deviceaddress;
         buff++;
       }