Problem writing to flash

[ian239955]

Posted on July 09, 2014 at 11:55

Hi, I'm running the example code to try to program the flash memory. This starts:

void WriteFlash(void){    /*!< At this stage the microcontroller clock setting is already configured,        this is done through SystemInit() function which is called from startup       file (startup_stm32f4xx.s) before to branch to application main.       To reconfigure the default setting of SystemInit() function, refer to       system_stm32f4xx.c file     */    /* Unlock the Flash to enable the flash control register access *************/   FLASH_Unlock(); /* Erase the user Flash area    (area defined by FLASH_USER_START_ADDR and FLASH_USER_END_ADDR) ***********//* Clear pending flags (if any) */    FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR |                   FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR); .............        etc................ Then it erases the flash:if (FLASH_EraseSector(i, VoltageRange_3) != FLASH_COMPLETE) ..... But when I step into this, it jumps out to a hard fault on this line:/* if the erase operation is completed, disable the SER Bit */    FLASH->CR &= (~FLASH_CR_SER);Does anyone know what the hard fault is and how to overcome it?Thanks

[ian239955]

Posted on July 09, 2014 at 14:58Solved it, I did not think I was, but I was erasing the code that was running. derrrrrr.

[Tesla DeLorean]

Posted on July 09, 2014 at 15:22

Solved it, I did not think I was, but I was erasing the code that was running. derrrrrr.

That tends to rain on the parade a bit. I'd also watch out for what the ART has cached.