Need to have DFU jump right to the program to unset those option bytes, or somehow have dfu-util unset them. Probably try using the :leave parameter...
Flashing a binary file to address 0x8004000 of device memory and ask the device to leave DFU mode:
$ dfu-util -a 0 -s 0x08004000:leave -D /path/to/image.bin
*/
// Unset bootloader option bytes
void bootloader_unset(void)
{
@@ -31,6 +41,8 @@ void bootloader_enter(void) {
HAL_FLASHEx_OBGetConfig(&OBParam);
// FIXME TODO: CHECK THESE OPTION BYTES, he was using an F1 processor. What about the switch flag?
OBParam.OptionType = OPTIONBYTE_USER;
/*Reset NBOOT0 and BOOT_SEL, see: RM 2.5 Boot configuration*/
OBParam.USERConfig = 0x77; //Sorry for magic number :)