Posted on June 21, 2012 at 13:54
Hi all,
I'm trying to write an update routine for an STM8S003F3, so that it can be updated over SPI.
I'm pulling 128byte chunks of data from a routine in ram, then attempting to write them to the main program flash. I've tried to follow the programming guide
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/PROGRAMMING_MANUAL/CD00191pdf
, but it seems that when I try to write a block, nothing is happening. Here's my code:
FLASH->PUKR = FLASH_RASS_KEY1;
FLASH->PUKR = FLASH_RASS_KEY2;
FLASH->CR2 |= (u8)0x01;
FLASH->NCR2 &= (u8)~0x01;
flashPtr = (u8*)(PROGRAM_FLASH_START_ADDRESS + (numBlocksWritten * 128));
for (i = 0; i <
64
; i++)
{
//write the block directly to memory offset by the number of 128 sized blocks written, and the start adress of the programming memory
*
flashPtr
=
0
; //spiPacket[3 + i];
flashPtr++;
}
flagstatus
=
0x00
;
//wait until the write has occured
while ((flagstatus == 0x00) && (flashWriteTimeout != 0x00))
{
flagstatus = (uint8_t)(FLASH->IAPSR & (FLASH_IAPSR_EOP | FLASH_IAPSR_WR_PG_DIS));
}
//relock
FLASH->IAPSR &= (uint8_t)FLASH_MEMTYPE_PROG;
I repeat that a second time for bytes 64 -
I'm just writing 0x00 to each address here for testing purposes, but it's not doing anything. I feel like I must be missing something important, but can't figure it out from the guide. Any help would be much appreciated.
#stm8s003f3 #flash-programming-stm8s
