Flash - writing help

[hidethecheeze]

Posted on March 25, 2011 at 19:58

I am new to all of this. I got the board from a classmate.

I am trying to store accelerometer data in the flash during an experiment. Then, retrieve it when I plug the board into the computer via the USB. I am struggling to completely understand the Flash Programming Manual and the Flash examples in Atollic.

1. What line(s) of code will write a specific number value from the accelerometer to the flash?

2. How do I have it write to the next slot (page?), since the code runs in a loop?

3. How would I retrieve the data?

Thank you

#flash

[Tesla DeLorean]

Posted on March 25, 2011 at 20:12

Reading out via USB will be a challenge since that's connected to the ST-LINK device, not the STM32VL device.

The minimum granularity for writing is 16-bits, on even addresses. The memory needs to be erased to write to it. void Flash_WriteTest(u32 FlashAddr, u16 FlashWord) {     FLASH_Status FLASHStatus;     printf(''FLSH WriteTest %08X -> %08X %04X\n'', FlashAddr, *((DWORD *)FlashAddr), FlashWord);     FLASH_Unlock();     FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);   FLASHStatus = FLASH_ProgramHalfWord(FlashAddr, FlashWord);     if (FLASHStatus != FLASH_COMPLETE)         printf(''FLSH : ?? WriteTest %d\r\n'',FLASHStatus);     printf(''FLSH WriteTest %08X %04X\n'',*((DWORD *)FlashAddr), FlashWord); }