make flash error

[rico666]

make flash exhibits less than optimal behavior

$ make flash
arm-none-eabi-objcopy -Obinary main.elf main.bin
/usr/bin/st-flash  write main.bin 0x8000000
st-flash 1.6.1
2021-03-22T17:40:27 INFO common.c: F1xx Medium-density: 20 KiB SRAM, 128 KiB flash in at least 1 KiB pages.
file main.bin md5 checksum: 6dbdf99e962bdc0f293082734b88, stlink checksum: 0x00056291
2021-03-22T17:40:27 INFO common.c: Attempting to write 3816 (0xee8) bytes to stm32 address: 134217728 (0x8000000)
2021-03-22T17:40:27 INFO common.c: Flash page at addr: 0x08000000 erased
2021-03-22T17:40:27 INFO common.c: Flash page at addr: 0x08000400 erased
2021-03-22T17:40:27 INFO common.c: Flash page at addr: 0x08000800 erased
2021-03-22T17:40:27 INFO common.c: Flash page at addr: 0x08000c00 erased
2021-03-22T17:40:27 INFO common.c: Finished erasing 4 pages of 1024 (0x400) bytes
2021-03-22T17:40:27 INFO common.c: Starting Flash write for VL/F0/F3/F1_XL core id
2021-03-22T17:40:27 INFO flash_loader.c: Successfully loaded flash loader in sram
2021-03-22T17:40:27 ERROR flash_loader.c: flash loader run error
2021-03-22T17:40:27 ERROR common.c: stlink_flash_loader_run(0x8000000) failed! == -1
stlink_fwrite_flash() == -1
make: *** [../../Makefile.incl:134: flash] Error 255

And it has been a neverending story for quite some time: see stlink-org/stlink#607 and
stlink-org/stlink#356

One solution is to constantly plug and unplug STlink, which is not sustainable. Another solution is to modify Makefile.incl and insert the --reset option:

# Flash 64k Device
flash:	$(BINARY).bin
	$(STFLASH) --reset $(FLASHSIZE) write $(BINARY).bin 0x8000000

# Flash 128k Device
bigflash: $(BINARY).bin
	$(STFLASH) --reset --flash=128k write $(BINARY).bin 0x8000000