void writeFlash(uint32_t *address, uint32_t *buffer) // page size is 256 bytes
{
if ((uint32_t) address == 0x08000000) {
eraseSector(0);
}
else if ((uint32_t) address == 0x08004000) {
eraseSector(1);
}
else if ((uint32_t) address == 0x08008000) {
eraseSector(2);
}
else if ((uint32_t) address == 0x0800C000) {
eraseSector(3);
}
else if ((uint32_t) address == 0x08010000) {
eraseSector(4);
}
else if ((uint32_t) address == 0x08020000) {
eraseSector(5);
}
else if ((uint32_t) address == 0x08040000) {
eraseSector(6);
}
else if ((uint32_t) address == 0x08060000) {
eraseSector(7);
}
for (uint32_t i=0; i<FLASH_PAGESIZE/4; i++) {
/* Device voltage range supposed to be [2.7V to 3.6V], the operation will
be done by word */
// Wait for last operation to be completed
waitFlashIdle();
FLASH->CR &= CR_PSIZE_MASK;
FLASH->CR |= FLASH_PSIZE_WORD;
FLASH->CR |= FLASH_CR_PG;
*address = *buffer;
/* Wait for operation to be completed */
waitFlashIdle();
FLASH->CR &= (~FLASH_CR_PG);
/* Check the written value */
if (*address != *buffer) {
/* Flash content doesn't match SRAM content */
return;
}
/* Increment FLASH destination address */
address += 1;
buffer += 1;
}
}
uint32_t program( uint32_t *address, uint32_t *buffer ) // size is 256 bytes
{
uint32_t i ;
if ( (uint32_t) address >= 0x08008000 )
{
return 1 ;
}
if ( (uint32_t) address == 0x08000000 )
{
eraseSector( 0 ) ;
}
if ( (uint32_t) address == 0x08004000 )
{
eraseSector( 1 ) ;
}
// Now program the 256 bytes
for (i = 0 ; i < 64 ; i += 1 )
{
/* Device voltage range supposed to be [2.7V to 3.6V], the operation will
be done by word */
// Wait for last operation to be completed
waitFlashIdle() ;
FLASH->CR &= CR_PSIZE_MASK;
FLASH->CR |= FLASH_PSIZE_WORD;
FLASH->CR |= FLASH_CR_PG;
*address = *buffer ;
__disable_irq() ;
/* Wait for operation to be completed */
waitFlashIdle() ;
FLASH->CR &= (~FLASH_CR_PG);
__enable_irq() ;
/* Check the written value */
if ( *address != *buffer )
{
/* Flash content doesn't match SRAM content */
return 2 ;
}
/* Increment FLASH destination address */
address += 1 ;
buffer += 1 ;
}
return 0 ;
}
void eraseSector(uint32_t sector)
{
waitFlashIdle();
FLASH->CR &= CR_PSIZE_MASK;
FLASH->CR |= FLASH_PSIZE_WORD;
FLASH->CR &= SECTOR_MASK;
FLASH->CR |= FLASH_CR_SER | (sector << 3);
FLASH->CR |= FLASH_CR_STRT;
/* Wait for operation to be completed */
waitFlashIdle();
/* if the erase operation is completed, disable the SER Bit */
FLASH->CR &= (~FLASH_CR_SER);
FLASH->CR &= SECTOR_MASK;
}
