#!/usr/bin/env python
# -*- coding: utf-8 -*-

import usb.core
import usb.util

dev = usb.core.find(idVendor=0x0451, idProduct=0x9815)

# was it found?
if dev is None:
    raise ValueError('Device not found')

# set the active configuration. With no arguments, the first
# configuration will be the active one
dev.set_configuration()

# get an endpoint instance
cfg = dev.get_active_configuration()
# print cfg
intf = cfg[(0,0)]

ep = usb.util.find_descriptor(
        intf,
        # match the first OUT endpoint
        custom_match = \
                lambda e: \
                usb.util.endpoint_direction(e.bEndpointAddress) == \
                usb.util.ENDPOINT_OUT)

assert ep is not None
print ep

bootData = file("boot.bin").read()
msg = bytearray.fromhex('A1ACED01')
msg += bytearray.fromhex('00000100') #entry address
msg += bytearray.fromhex('%08x' % len(bootData)) #block length
msg += bytearray.fromhex('00000020') #store address
msg += bytearray.fromhex('00000000')

head = file("head", "w")
head.write(msg)
head.close()

ep.write(file("head").read())
ep.write(bootData)