Flash programming byte

[cgrenier]

Posted on May 27, 2009 at 16:36

Flash programming byte

[cgrenier]

Posted on May 17, 2011 at 13:13

Hello,

I have data to store in the flash. Many structures of 11 bytes to save in a page. But I read from the programming manual that we could not program a byte only. How can I manage that? I'd like to store 11 bytes. I get always a FLASH_PG_ERR! Data will start from address 0x800C800. The first structure will be stored from 0x800C800 - 0x800C80A. The second one from 0x800C80B - 0x800C815. Is it a problem? I'm little bit confused to avoid this FLASH_PG_ERR... [FLASH PAGE] [DATA #1] [DATA #2] ... [DATA #n]

[ivanov-i]

Posted on May 17, 2011 at 13:13

Just store 12 bytes per each structure. And always start at even address.

[gabrielbonato]

Posted on May 17, 2011 at 13:13

Hello,

Address: specifies the address to be programmed. This parameter can be 0x1FFFF804 or 0x1FFFF806. ''stm32f10x_flash.c'' /******************************************************************************* * Function Name : FLASH_ProgramOptionByteData * Description : Programs a half word at a specified Option Byte Data address. * Input : - Address: specifies the address to be programmed. * This parameter can be 0x1FFFF804 or 0x1FFFF806. * - Data: specifies the data to be programmed. * Output : None * Return : FLASH Status: The returned value can be: FLASH_BUSY, * FLASH_ERROR_PG, FLASH_ERROR_WRP, FLASH_COMPLETE or * FLASH_TIMEOUT. *******************************************************************************/ FLASH_Status FLASH_ProgramOptionByteData(u32 Address, u8 Data) { FLASH_Status status = FLASH_COMPLETE; /* Check the parameters */ assert_param(IS_OB_DATA_ADDRESS(Address)); status = FLASH_WaitForLastOperation(ProgramTimeout); if(status == FLASH_COMPLETE) { /* Authorize the small information block programming */ FLASH->OPTKEYR = FLASH_KEY1; FLASH->OPTKEYR = FLASH_KEY2; /* Enables the Option Bytes Programming operation */ FLASH->CR |= CR_OPTPG_Set; *(vu16*)Address = Data; /* Wait for last operation to be completed */ status = FLASH_WaitForLastOperation(ProgramTimeout); if(status != FLASH_BUSY) { /* if the program operation is completed, disable the OPTPG Bit */ FLASH->CR &= CR_OPTPG_Reset; } } /* Return the Option Byte Data Program Status */ return status; }