ST STM32L0x3 User Manual

Code examples RM0367
980/1043 RM0367 Rev 7
/* Manage the error cases */
}
FLASH->PECR &= ~(FLASH_PECR_PROG | FLASH_PECR_FPRG); /* (6) */
}
Note: This function must be loaded in RAM.
A.3.11 Erase a page in Flash program memory code example
/**
* This function erases a page of flash.
* The Page Erase bit (PER) is set at the beginning and reset
* at the end of the function, in case of successive erase,
* these two operations could be performed outside the function.
* Param page_addr is an address inside the page to erase
* Retval None
*/
__INLINE void FlashErase(uint32_t page_addr)
{
/* (1) Set the ERASE and PROG bits in the FLASH_PECR register
to enable page erasing */
/* (2) Write a 32-bit word value in an address of the selected page
to start the erase sequence */
/* (3) Wait until the BSY bit is reset in the FLASH_SR register */
/* (4) Check the EOP flag in the FLASH_SR register */
/* (5) Clear EOP flag by software by writing EOP at 1 */
/* (6) Reset the ERASE and PROG bits in the FLASH_PECR register
to disable the page erase */
FLASH->PECR |= FLASH_PECR_ERASE | FLASH_PECR_PROG; /* (1) */
*(__IO uint32_t *)page_addr = (uint32_t)0; /* (2) */
while ((FLASH->SR & FLASH_SR_BSY) != 0) /* (3) */
{
/* For robust implementation, add here time-out management */
}
if ((FLASH->SR & FLASH_SR_EOP) != 0) /* (4) */
{
FLASH->SR = FLASH_SR_EOP; /* (5) */
}
else
{
/* Manage the error cases */
}
FLASH->PECR &= ~(FLASH_PECR_ERASE | FLASH_PECR_PROG); /* (6) */
}

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English