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DFU: Erase option bytes before writing.

This commit is contained in:
Gareth McMullin 2012-05-23 19:31:51 +12:00
parent 241bf765ec
commit 700f9e6ad1
1 changed files with 6 additions and 0 deletions
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6
src/stm32/usbdfu.c
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@ -32,8 +32,11 @@
#define CMD_SETADDR 0x21
#define CMD_ERASE 0x41
#define FLASH_OBP_RDP 0x1FFFF800
#define FLASH_OBP_WRP10 0x1FFFF808
#define FLASH_OBP_RDP_KEY 0x5aa5
/* We need a special large control buffer for this device: */
u8 usbd_control_buffer[1024];
@ -260,6 +263,9 @@ int main(void)
if ((FLASH_WRPR & 0x03) != 0x00) {
flash_unlock();
FLASH_CR = 0;
flash_erase_option_bytes();
flash_program_option_bytes(FLASH_OBP_RDP, FLASH_OBP_RDP_KEY);
flash_program_option_bytes(FLASH_OBP_WRP10, 0x03FC);
}