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Hi,
I am using stm32c071 MCU to store data into flash. I have erased page 63 wrote data into 0x0801F800 then locked the flash and then again unlocked it erased page 63 wrote data in 0x0801F820, but the contents of 0x0801F800 is still there even after page erase. Is this expected?
My flash write code
eFLASH_ErrorType_t WriteDataToFlash(uint64_t *data, uint32_t address, uint8_t page, uint8_t length)
{
eFLASH_ErrorType_t err_code = e_SUCCESS;
uint32_t *addr = (uint32_t*)address;
// Check if flash is busy
err_code = CheckFlashBusy();
if(err_code != e_SUCCESS)
{
return err_code;
}
// Unlock flash
err_code = flashUnlock();
if(err_code != e_FLASH_UNLOCKED)
{
return err_code;
}
// Erase page before writing
err_code = flashErasePage(page);
if(err_code != e_SUCCESS)
{
return err_code;
}
// Clear any previous errors
ClearFlashErrors();
// Check if flash configuration is busy
if(flashGetStatus(FLASH_SR_CFGBSY) == e_SUCCESS)
{
FLASH->CR |= FLASH_CR_PG; // Flash programming Enable
FLASH->CR |= FLASH_CR_EOPIE; // Enable Interrupt when EOP bit is set
// Program double words
for (uint8_t i = 0; i < length; i++)
{
*(__IO uint32_t*)addr = (uint32_t)data[i];
addr = addr + 1u;
*(__IO uint32_t*)addr = (uint32_t)(data[i] >> 32u);
addr = addr + 1u;
}
// Wait for operation completion
if(flashGetStatus(FLASH_SR_CFGBSY) == e_FLASH_ERROR)
{
err_code = e_FLASH_BUSY;
}
// Wait for and clear EOP flag
if(WaitForFlashEndOfOperation() == e_FLASH_ERROR)
{
err_code = e_FLASH_ERROR;
}
// Disable programming mode
FLASH->CR &= ~FLASH_CR_PG;
}
else
{
err_code = e_FLASH_BUSY;
}
flashLock();
return err_code;
}
Regards,
Shafi
