ST STM32L0x3 User Manual

RM0367 Rev 7 981/1043
RM0367 Code examples
1020
A.3.12 Mass erase code example
/**
* This function performs a mass erase of the flash.
* This function is loaded in RAM.
* Param None
* Retval while successful, the function never returns except if executed
from RAM
*/
__RAM_FUNC void FlashMassErase(void)
{
/* (1) Check if the read protection is not level 2 */
/* (2) Check if the read protection is not level 1 */
/* (3) Erase the Option byte containing the read protection */
/* (4) Reload the Option bytes */
/* (5) Program read protection to level 1 by writing 0xAA
to start the mass erase */
/* (6) Lock the NVM by setting the PELOCK bit */
if ((FLASH->OPTR & 0x000000FF) == 0xCC) /* (1) */
{
/* Report the error and abort*/
return;
}
else if ((FLASH->OPTR & 0x000000FF) == 0xAA) /* (2) */
{
OptionByteErase(FLASH_OPTR0); /* (3) */
FLASH->PECR |= FLASH_PECR_OBL_LAUNCH; /* (4) */
/* The MCU will reset while executing the option bytes reloading */
}
OptionByteProg(FLASH_OPTR0, 0x00AA); /* (5) */
if (*(uint32_t *)(FLASH_MAIN_ADDR ) != (uint32_t)0) /* Check the erasing
of the page by reading all the page value */
{
/* Report the error */
}
LockNVM(); /* (6) */
while (1) /* Infinite loop */
{
}
}
Note: This function uses two other ones in A.3.7: Program Option byte code example and A.3.8:
Erase Option byte code example.

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English