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DFU.py
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DFU.py
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# -*- coding: utf-8 -*-
from __future__ import print_function
import struct
import sys
import time
class Enumeration(object):
def __init__(self, id, name):
self._id = id
self._name = name
setattr(self.__class__, name, self)
self.map[id] = self
def __int__(self):
return self.id
def __repr__(self):
return self.name
@property
def id(self):
return self._id
@property
def name(self):
return self._name
@classmethod
def create_from_map(cls):
for id, name in cls.map.items():
cls(id, name)
class Request(Enumeration):
map = {
0: 'DETACH',
1: 'DNLOAD',
2: 'UPLOAD',
3: 'GETSTATUS',
4: 'CLRSTATUS',
5: 'GETSTATE',
6: 'ABORT',
}
Request.create_from_map()
class State(Enumeration):
map = {
0: 'appIDLE',
1: 'appDETACH',
2: 'dfuIDLE',
3: 'dfuDNLOAD_SYNC',
4: 'dfuDNBUSY',
5: 'dfuDNLOAD_IDLE',
6: 'dfuMANIFEST_SYNC',
7: 'dfuMANIFEST',
8: 'dfuMANIFEST_WAIT_RESET',
9: 'dfuUPLOAD_IDLE',
10: 'dfuERROR',
}
State.create_from_map()
class Status(Enumeration):
map = {
0x00: 'OK',
0x01: 'errTARGET',
0x02: 'errFILE',
0x03: 'errWRITE',
0x04: 'errERASE',
0x05: 'errCHECK_ERASED',
0x06: 'errPROG',
0x07: 'errVERIFY',
0x08: 'errADDRESS',
0x09: 'errNOTDONE',
0x0A: 'errFIRMWARE',
0x0B: 'errVENDOR',
0x0C: 'errUSBR',
0x0D: 'errPOR',
0x0E: 'errUNKNOWN',
0x0F: 'errSTALLEDPKT',
}
Status.create_from_map()
class DFU(object):
verbose = False
def __init__(self, device, alt):
device.set_interface_altsetting(interface=0, alternate_setting=alt)
self._device = device
def detach(self):
"""Detaches from the DFU target."""
self._device.ctrl_transfer(0x21, Request.DETACH, 0, 0, None)
def get_string(self, i=0):
"""Gets a USB descriptor string, to distinguish firmware types."""
import usb
# Linux and Mac have different calling conventions for usb.util.get_string(),
# so we'll try each of them and hope for the best.
try:
# Mac calling convention.
return usb.util.get_string(self._device, 255, i, None)
except:
# Linux calling convention.
return usb.util.get_string(self._device, i, None)
def bcd(self, b):
"""Converts a byte from BCD to integer."""
return int("%02x" % b)
def get_time(self):
"""Returns a datetime object for the radio's current time."""
self.md380_custom(0x91, 0x01) # Programming Mode
self.md380_custom(0xA2, 0x08) # Access the clock memory.
time = self.upload(0, 7) # Read the time bytes as BCD.
# hexdump("Time is: "+time);
from datetime import datetime
dt = datetime(self.bcd(time[0]) * 100 + self.bcd(time[1]),
self.bcd(time[2]),
self.bcd(time[3]),
self.bcd(time[4]),
self.bcd(time[5]),
self.bcd(time[6]))
return dt
def set_time(self):
from datetime import datetime
if len(sys.argv) == 3:
try:
time_to_set = datetime.strptime(sys.argv[2], '%m/%d/%Y %H:%M:%S')
except ValueError:
print("Usage: md380-dfu settime \"mm/dd/yyyy HH:MM:SS\" (with quotes)")
exit()
else:
time_to_set = datetime.now()
dt = datetime.strftime(time_to_set, '%Y%m%d%H%M%S').decode("hex")
self.md380_custom(0x91, 0x02)
self.download(0, "\xb5" + dt)
self.wait_till_ready()
self.md380_reboot()
def download(self, block_number, data):
self._device.ctrl_transfer(0x21, Request.DNLOAD, block_number, 0, data)
# time.sleep(0.1);
def set_address(self, address):
a = address & 0xFF
b = (address >> 8) & 0xFF
c = (address >> 16) & 0xFF
d = (address >> 24) & 0xFF
self._device.ctrl_transfer(0x21, Request.DNLOAD, 0, 0, [0x21, a, b, c, d])
self.get_status() # this changes state
status = self.get_status() # this gets the status
if status[2] == State.dfuDNLOAD_IDLE:
if self.verbose:
print("Set pointer to 0x%08x." % address)
self.enter_dfu_mode()
else:
if self.verbose:
print("Failed to set pointer.")
return False
return True
def erase_block(self, address):
a = address & 0xFF
b = (address >> 8) & 0xFF
c = (address >> 16) & 0xFF
d = (address >> 24) & 0xFF
self._device.ctrl_transfer(0x21, Request.DNLOAD, 0, 0, [0x41, a, b, c, d])
# time.sleep(0.5);
self.get_status() # this changes state
status = self.get_status() # this gets the status
if status[2] == State.dfuDNLOAD_IDLE:
if self.verbose:
print("Erased 0x%08x." % address)
self.enter_dfu_mode()
else:
if self.verbose:
print("Failed to erase block.")
return False
return True
def md380_custom(self, a, b):
"""Sends a secret MD380 command."""
a &= 0xFF
b &= 0xFF
self._device.ctrl_transfer(0x21, Request.DNLOAD, 0, 0, [a, b])
self.get_status() # this changes state
time.sleep(0.1)
status = self.get_status() # this gets the status
if status[2] == State.dfuDNLOAD_IDLE:
if self.verbose:
print("Sent custom %02x %02x." % (a, b))
self.enter_dfu_mode()
else:
print("Failed to send custom %02x %02x." % (a, b))
return False
return True
def md380_reboot(self):
"""Sends the MD380's secret reboot command."""
a = 0x91
b = 0x05
self._device.ctrl_transfer(0x21, Request.DNLOAD, 0, 0, [a, b])
try:
self.get_status() # this changes state
except:
pass
return True
def upload(self, block_number, length, index=0):
if self.verbose:
print("Fetching block 0x%x." % block_number)
data = self._device.ctrl_transfer(0xA1, # request type
Request.UPLOAD, # request
block_number, # wValue
index, # index
length) # length
return data
def get_command(self):
data = self._device.ctrl_transfer(0xA1, # request type
Request.UPLOAD, # request
0, # wValue
0, # index
32) # length
self.get_status()
return data
def get_status(self):
status_packed = self._device.ctrl_transfer(0xA1, Request.GETSTATUS, 0, 0, 6)
status = struct.unpack('<BBBBBB', status_packed)
return (Status.map[status[0]], (((status[1] << 8) | status[2]) << 8) | status[3],
State.map[status[4]], status[5])
def clear_status(self):
self._device.ctrl_transfer(0x21, Request.CLRSTATUS, 0, 0, None)
def get_state(self):
state_packed = self._device.ctrl_transfer(0xA1, Request.GETSTATE, 0, 0, 1)
return State.map[struct.unpack('<B', state_packed)[0]]
def abort(self):
self._device.ctrl_transfer(0x21, Request.ABORT, 0, 0, None)
def wait_till_ready(self, desired_state=State.dfuIDLE):
state = 11
status, timeout, state, discarded = self.get_status()
while state != State.dfuIDLE:
self.clear_status()
status, timeout, state, discarded = self.get_status()
return
def enter_dfu_mode(self):
action_map = {
State.dfuDNLOAD_SYNC: self.abort,
State.dfuDNLOAD_IDLE: self.abort,
State.dfuMANIFEST_SYNC: self.abort,
State.dfuUPLOAD_IDLE: self.abort,
State.dfuERROR: self.clear_status,
State.appIDLE: self.detach,
State.appDETACH: self._wait,
State.dfuDNBUSY: self._wait,
State.dfuMANIFEST: self.abort,
State.dfuMANIFEST_WAIT_RESET: self._wait,
State.dfuIDLE: self._wait
}
while True:
state = self.get_state()
if state == State.dfuIDLE:
break
action = action_map[state]
action()
def _wait(self):
time.sleep(0.1)
def widestr(self, str):
tr = ""
for c in str:
tr = tr + c + "\0"
return tr + "\0\0"