Tool/software:
Hi,
I am using MSPM0G3507 launchpad for development.I came across the example codes related to Flash.
I have implemented a basic driver for Flash write:
1. Read the whole sector.
2. Modify the bytes
3. Erase the sector
4. Update the Sector
This is the sequence I am using. I will share the code snippet. It is working also.
But I think it is not optimized. If I want to just modify one byte any other method?
#define FLASH_WORD_SIZE 8
#define FLASH_SECTOR_SIZE 1024
/******************************************************* */
int8_t Flash_UpdateSector(uint32_t sectorAddr, uint8_t *newData)
{
DL_FLASHCTL_COMMAND_STATUS gCmdStatus;
// Erase sector
DL_FlashCTL_executeClearStatus(FLASHCTL);
DL_FlashCTL_unprotectSector(FLASHCTL, sectorAddr, DL_FLASHCTL_REGION_SELECT_MAIN);
gCmdStatus = DL_FlashCTL_eraseMemoryFromRAM(FLASHCTL, sectorAddr, DL_FLASHCTL_COMMAND_SIZE_SECTOR);
if (gCmdStatus == DL_FLASHCTL_COMMAND_STATUS_FAILED)
return BOARD_FLASH_ERROR;
// Program back sector (word by word)
for (uint32_t offset = 0; offset < FLASH_SECTOR_SIZE; offset += FLASH_WORD_SIZE)
{
DL_FlashCTL_executeClearStatus(FLASHCTL);
DL_FlashCTL_unprotectSector(FLASHCTL, sectorAddr + offset, DL_FLASHCTL_REGION_SELECT_MAIN);
gCmdStatus = DL_FlashCTL_programMemoryFromRAM64WithECCGenerated(FLASHCTL, sectorAddr + offset,
(uint32_t *)&newData[offset]);
if (gCmdStatus == DL_FLASHCTL_COMMAND_STATUS_FAILED)
return BOARD_FLASH_ERROR;
}
return BOARD_FLASH_OK;
}
int8_t Flash_Write_Bytes(uint32_t address, uint8_t *pData, uint32_t length)
{
uint32_t sectorAddr = address & ~(FLASH_SECTOR_SIZE - 1); // sector base
uint8_t buffer[FLASH_SECTOR_SIZE];
// Copy whole sector into RAM buffer
memcpy(buffer, (void *)sectorAddr, FLASH_SECTOR_SIZE);
// Modify the required bytes
for (uint32_t i = 0; i < length; i++)
{
buffer[(address - sectorAddr) + i] = pData[i];
}
// Reprogram the entire sector
return Flash_UpdateSector(sectorAddr, buffer);
}
