usb_probe.py

#!/usr/bin/env python

# 2016

from hidapi import hidapi
from elftools.elf.elffile import ELFFile

import ctypes, time, sys

# Open device
dev = hidapi.hid_open(0x10C4, 0x63CD, None)
if not dev:
	raise RuntimeError('Device not found.')

print 'Found bootloader device, starting flashing.'

# Prepare
if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x20'), 2) != 2:
	raise RuntimeError('Prepare failed.')

# Flash
while buf:
	if hidapi.hid_write(dev, ctypes.c_char_p('\x00' + buf[:64]), 65) != 65:
		raise RuntimeError('Writing failed.')
	buf = buf[64:]

# Finish
if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x21'), 2) != 2:
	raise RuntimeError('Finish failed.')

print 'Flashing finished, resetting to runtime.'

# Reset
if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x11'), 2) != 2:
	raise RuntimeError('Reset failed.')

time.sleep(1)

hidapi.hid_exit()

if hidapi.hid_open(0x10C4, 0x63CD, None):
	print 'Done, everything ok.'

else:
	print 'Device disappeared.'