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627 lines
20 KiB
627 lines
20 KiB
#!/usr/bin/env python
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# This file is part of the OpenMV project.
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# Copyright (c) 2013/2014 Ibrahim Abdelkader <i.abdalkader@gmail.com>
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# This work is licensed under the MIT license, see the file LICENSE for
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# details.
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"""This module implements enough functionality to program the STM32F4xx over
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DFU, without requiring dfu-util.
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See app note AN3156 for a description of the DFU protocol.
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See document UM0391 for a dscription of the DFuse file.
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"""
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from __future__ import print_function
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import argparse
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import collections
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import inspect
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import re
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import struct
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import sys
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import usb.core
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import usb.util
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import zlib
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# USB request __TIMEOUT
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__TIMEOUT = 4000
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# DFU commands
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__DFU_DETACH = 0
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__DFU_DNLOAD = 1
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__DFU_UPLOAD = 2
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__DFU_GETSTATUS = 3
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__DFU_CLRSTATUS = 4
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__DFU_GETSTATE = 5
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__DFU_ABORT = 6
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# DFU status
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__DFU_STATE_APP_IDLE = 0x00
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__DFU_STATE_APP_DETACH = 0x01
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__DFU_STATE_DFU_IDLE = 0x02
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__DFU_STATE_DFU_DOWNLOAD_SYNC = 0x03
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__DFU_STATE_DFU_DOWNLOAD_BUSY = 0x04
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__DFU_STATE_DFU_DOWNLOAD_IDLE = 0x05
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__DFU_STATE_DFU_MANIFEST_SYNC = 0x06
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__DFU_STATE_DFU_MANIFEST = 0x07
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__DFU_STATE_DFU_MANIFEST_WAIT_RESET = 0x08
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__DFU_STATE_DFU_UPLOAD_IDLE = 0x09
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__DFU_STATE_DFU_ERROR = 0x0A
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_DFU_DESCRIPTOR_TYPE = 0x21
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__DFU_STATUS_STR = {
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__DFU_STATE_APP_IDLE: "STATE_APP_IDLE",
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__DFU_STATE_APP_DETACH: "STATE_APP_DETACH",
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__DFU_STATE_DFU_IDLE: "STATE_DFU_IDLE",
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__DFU_STATE_DFU_DOWNLOAD_SYNC: "STATE_DFU_DOWNLOAD_SYNC",
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__DFU_STATE_DFU_DOWNLOAD_BUSY: "STATE_DFU_DOWNLOAD_BUSY",
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__DFU_STATE_DFU_DOWNLOAD_IDLE: "STATE_DFU_DOWNLOAD_IDLE",
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__DFU_STATE_DFU_MANIFEST_SYNC: "STATE_DFU_MANIFEST_SYNC",
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__DFU_STATE_DFU_MANIFEST: "STATE_DFU_MANIFEST",
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__DFU_STATE_DFU_MANIFEST_WAIT_RESET: "STATE_DFU_MANIFEST_WAIT_RESET",
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__DFU_STATE_DFU_UPLOAD_IDLE: "STATE_DFU_UPLOAD_IDLE",
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__DFU_STATE_DFU_ERROR: "STATE_DFU_ERROR",
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}
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# USB device handle
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__dev = None
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# Configuration descriptor of the device
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__cfg_descr = None
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__verbose = None
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# USB DFU interface
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__DFU_INTERFACE = 0
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# Python 3 deprecated getargspec in favour of getfullargspec, but
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# Python 2 doesn't have the latter, so detect which one to use
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getargspec = getattr(inspect, "getfullargspec", inspect.getargspec)
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if "length" in getargspec(usb.util.get_string).args:
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# PyUSB 1.0.0.b1 has the length argument
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def get_string(dev, index):
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return usb.util.get_string(dev, 255, index)
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else:
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# PyUSB 1.0.0.b2 dropped the length argument
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def get_string(dev, index):
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return usb.util.get_string(dev, index)
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def find_dfu_cfg_descr(descr):
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if len(descr) == 9 and descr[0] == 9 and descr[1] == _DFU_DESCRIPTOR_TYPE:
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nt = collections.namedtuple(
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"CfgDescr",
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[
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"bLength",
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"bDescriptorType",
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"bmAttributes",
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"wDetachTimeOut",
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"wTransferSize",
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"bcdDFUVersion",
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],
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)
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return nt(*struct.unpack("<BBBHHH", bytearray(descr)))
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return None
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def init(**kwargs):
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"""Initializes the found DFU device so that we can program it."""
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global __dev, __cfg_descr
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devices = get_dfu_devices(**kwargs)
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if not devices:
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raise ValueError("No DFU device found")
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if len(devices) > 1:
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raise ValueError("Multiple DFU devices found")
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__dev = devices[0]
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__dev.set_configuration()
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# Claim DFU interface
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usb.util.claim_interface(__dev, __DFU_INTERFACE)
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# Find the DFU configuration descriptor, either in the device or interfaces
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__cfg_descr = None
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for cfg in __dev.configurations():
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__cfg_descr = find_dfu_cfg_descr(cfg.extra_descriptors)
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if __cfg_descr:
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break
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for itf in cfg.interfaces():
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__cfg_descr = find_dfu_cfg_descr(itf.extra_descriptors)
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if __cfg_descr:
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break
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# Get device into idle state
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for attempt in range(4):
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status = get_status()
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if status == __DFU_STATE_DFU_IDLE:
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break
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elif status == __DFU_STATE_DFU_DOWNLOAD_IDLE or status == __DFU_STATE_DFU_UPLOAD_IDLE:
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abort_request()
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else:
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clr_status()
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def abort_request():
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"""Sends an abort request."""
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__dev.ctrl_transfer(0x21, __DFU_ABORT, 0, __DFU_INTERFACE, None, __TIMEOUT)
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def clr_status():
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"""Clears any error status (perhaps left over from a previous session)."""
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__dev.ctrl_transfer(0x21, __DFU_CLRSTATUS, 0, __DFU_INTERFACE, None, __TIMEOUT)
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def get_status():
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"""Get the status of the last operation."""
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stat = __dev.ctrl_transfer(0xA1, __DFU_GETSTATUS, 0, __DFU_INTERFACE, 6, 20000)
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# firmware can provide an optional string for any error
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if stat[5]:
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message = get_string(__dev, stat[5])
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if message:
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print(message)
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return stat[4]
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def check_status(stage, expected):
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status = get_status()
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if status != expected:
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raise SystemExit("DFU: %s failed (%s)" % (stage, __DFU_STATUS_STR.get(status, status)))
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def mass_erase():
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"""Performs a MASS erase (i.e. erases the entire device)."""
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# Send DNLOAD with first byte=0x41
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 0, __DFU_INTERFACE, "\x41", __TIMEOUT)
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# Execute last command
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check_status("erase", __DFU_STATE_DFU_DOWNLOAD_BUSY)
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# Check command state
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check_status("erase", __DFU_STATE_DFU_DOWNLOAD_IDLE)
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def page_erase(addr):
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"""Erases a single page."""
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if __verbose:
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print("Erasing page: 0x%x..." % (addr))
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# Send DNLOAD with first byte=0x41 and page address
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buf = struct.pack("<BI", 0x41, addr)
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 0, __DFU_INTERFACE, buf, __TIMEOUT)
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# Execute last command
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check_status("erase", __DFU_STATE_DFU_DOWNLOAD_BUSY)
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# Check command state
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check_status("erase", __DFU_STATE_DFU_DOWNLOAD_IDLE)
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def set_address(addr):
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"""Sets the address for the next operation."""
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# Send DNLOAD with first byte=0x21 and page address
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buf = struct.pack("<BI", 0x21, addr)
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 0, __DFU_INTERFACE, buf, __TIMEOUT)
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# Execute last command
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check_status("set address", __DFU_STATE_DFU_DOWNLOAD_BUSY)
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# Check command state
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check_status("set address", __DFU_STATE_DFU_DOWNLOAD_IDLE)
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def write_memory(addr, buf, progress=None, progress_addr=0, progress_size=0):
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"""Writes a buffer into memory. This routine assumes that memory has
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already been erased.
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"""
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xfer_count = 0
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xfer_bytes = 0
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xfer_total = len(buf)
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xfer_base = addr
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while xfer_bytes < xfer_total:
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if __verbose and xfer_count % 512 == 0:
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print(
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"Addr 0x%x %dKBs/%dKBs..."
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% (xfer_base + xfer_bytes, xfer_bytes // 1024, xfer_total // 1024)
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)
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if progress and xfer_count % 2 == 0:
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progress(progress_addr, xfer_base + xfer_bytes - progress_addr, progress_size)
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# Set mem write address
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set_address(xfer_base + xfer_bytes)
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# Send DNLOAD with fw data
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chunk = min(__cfg_descr.wTransferSize, xfer_total - xfer_bytes)
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__dev.ctrl_transfer(
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0x21, __DFU_DNLOAD, 2, __DFU_INTERFACE, buf[xfer_bytes : xfer_bytes + chunk], __TIMEOUT
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)
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# Execute last command
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check_status("write memory", __DFU_STATE_DFU_DOWNLOAD_BUSY)
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# Check command state
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check_status("write memory", __DFU_STATE_DFU_DOWNLOAD_IDLE)
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xfer_count += 1
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xfer_bytes += chunk
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def write_page(buf, xfer_offset):
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"""Writes a single page. This routine assumes that memory has already
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been erased.
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"""
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xfer_base = 0x08000000
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# Set mem write address
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set_address(xfer_base + xfer_offset)
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# Send DNLOAD with fw data
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 2, __DFU_INTERFACE, buf, __TIMEOUT)
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# Execute last command
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check_status("write memory", __DFU_STATE_DFU_DOWNLOAD_BUSY)
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# Check command state
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check_status("write memory", __DFU_STATE_DFU_DOWNLOAD_IDLE)
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if __verbose:
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print("Write: 0x%x " % (xfer_base + xfer_offset))
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def exit_dfu():
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"""Exit DFU mode, and start running the program."""
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# Set jump address
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set_address(0x08000000)
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# Send DNLOAD with 0 length to exit DFU
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 0, __DFU_INTERFACE, None, __TIMEOUT)
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try:
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# Execute last command
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if get_status() != __DFU_STATE_DFU_MANIFEST:
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print("Failed to reset device")
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# Release device
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usb.util.dispose_resources(__dev)
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except:
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pass
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def named(values, names):
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"""Creates a dict with `names` as fields, and `values` as values."""
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return dict(zip(names.split(), values))
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def consume(fmt, data, names):
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"""Parses the struct defined by `fmt` from `data`, stores the parsed fields
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into a named tuple using `names`. Returns the named tuple, and the data
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with the struct stripped off."""
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size = struct.calcsize(fmt)
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return named(struct.unpack(fmt, data[:size]), names), data[size:]
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def cstring(string):
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"""Extracts a null-terminated string from a byte array."""
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return string.decode("utf-8").split("\0", 1)[0]
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def compute_crc(data):
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"""Computes the CRC32 value for the data passed in."""
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return 0xFFFFFFFF & -zlib.crc32(data) - 1
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def read_dfu_file(filename):
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"""Reads a DFU file, and parses the individual elements from the file.
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Returns an array of elements. Each element is a dictionary with the
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following keys:
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num - The element index.
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address - The address that the element data should be written to.
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size - The size of the element data.
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data - The element data.
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If an error occurs while parsing the file, then None is returned.
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"""
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print("File: {}".format(filename))
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with open(filename, "rb") as fin:
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data = fin.read()
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crc = compute_crc(data[:-4])
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elements = []
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# Decode the DFU Prefix
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#
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# <5sBIB
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# < little endian Endianness
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# 5s char[5] signature "DfuSe"
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# B uint8_t version 1
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# I uint32_t size Size of the DFU file (without suffix)
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# B uint8_t targets Number of targets
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dfu_prefix, data = consume("<5sBIB", data, "signature version size targets")
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print(
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" %(signature)s v%(version)d, image size: %(size)d, "
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"targets: %(targets)d" % dfu_prefix
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)
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for target_idx in range(dfu_prefix["targets"]):
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# Decode the Image Prefix
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#
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# <6sBI255s2I
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# < little endian Endianness
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# 6s char[6] signature "Target"
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# B uint8_t altsetting
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# I uint32_t named Bool indicating if a name was used
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# 255s char[255] name Name of the target
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# I uint32_t size Size of image (without prefix)
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# I uint32_t elements Number of elements in the image
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img_prefix, data = consume(
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"<6sBI255s2I", data, "signature altsetting named name " "size elements"
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)
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img_prefix["num"] = target_idx
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if img_prefix["named"]:
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img_prefix["name"] = cstring(img_prefix["name"])
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else:
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img_prefix["name"] = ""
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print(
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" %(signature)s %(num)d, alt setting: %(altsetting)s, "
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'name: "%(name)s", size: %(size)d, elements: %(elements)d' % img_prefix
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)
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target_size = img_prefix["size"]
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target_data = data[:target_size]
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data = data[target_size:]
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for elem_idx in range(img_prefix["elements"]):
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# Decode target prefix
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#
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# <2I
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# < little endian Endianness
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# I uint32_t element Address
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# I uint32_t element Size
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elem_prefix, target_data = consume("<2I", target_data, "addr size")
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elem_prefix["num"] = elem_idx
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print(" %(num)d, address: 0x%(addr)08x, size: %(size)d" % elem_prefix)
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elem_size = elem_prefix["size"]
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elem_data = target_data[:elem_size]
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target_data = target_data[elem_size:]
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elem_prefix["data"] = elem_data
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elements.append(elem_prefix)
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if len(target_data):
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print("target %d PARSE ERROR" % target_idx)
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# Decode DFU Suffix
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#
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# <4H3sBI
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# < little endian Endianness
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# H uint16_t device Firmware version
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# H uint16_t product
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# H uint16_t vendor
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# H uint16_t dfu 0x11a (DFU file format version)
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# 3s char[3] ufd "UFD"
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# B uint8_t len 16
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# I uint32_t crc32 Checksum
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dfu_suffix = named(
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struct.unpack("<4H3sBI", data[:16]), "device product vendor dfu ufd len crc"
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)
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print(
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" usb: %(vendor)04x:%(product)04x, device: 0x%(device)04x, "
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"dfu: 0x%(dfu)04x, %(ufd)s, %(len)d, 0x%(crc)08x" % dfu_suffix
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)
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if crc != dfu_suffix["crc"]:
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print("CRC ERROR: computed crc32 is 0x%08x" % crc)
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return
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data = data[16:]
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if data:
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print("PARSE ERROR")
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return
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return elements
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class FilterDFU(object):
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"""Class for filtering USB devices to identify devices which are in DFU
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mode.
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"""
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def __call__(self, device):
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for cfg in device:
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for intf in cfg:
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return intf.bInterfaceClass == 0xFE and intf.bInterfaceSubClass == 1
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def get_dfu_devices(*args, **kwargs):
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"""Returns a list of USB devices which are currently in DFU mode.
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Additional filters (like idProduct and idVendor) can be passed in
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to refine the search.
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"""
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# Convert to list for compatibility with newer PyUSB
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return list(usb.core.find(*args, find_all=True, custom_match=FilterDFU(), **kwargs))
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def get_memory_layout(device):
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"""Returns an array which identifies the memory layout. Each entry
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of the array will contain a dictionary with the following keys:
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addr - Address of this memory segment.
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last_addr - Last address contained within the memory segment.
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size - Size of the segment, in bytes.
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num_pages - Number of pages in the segment.
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page_size - Size of each page, in bytes.
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"""
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cfg = device[0]
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intf = cfg[(0, 0)]
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mem_layout_str = get_string(device, intf.iInterface)
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mem_layout = mem_layout_str.split("/")
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result = []
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for mem_layout_index in range(1, len(mem_layout), 2):
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addr = int(mem_layout[mem_layout_index], 0)
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segments = mem_layout[mem_layout_index + 1].split(",")
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seg_re = re.compile(r"(\d+)\*(\d+)(.)(.)")
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for segment in segments:
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seg_match = seg_re.match(segment)
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num_pages = int(seg_match.groups()[0], 10)
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page_size = int(seg_match.groups()[1], 10)
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multiplier = seg_match.groups()[2]
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if multiplier == "K":
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page_size *= 1024
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if multiplier == "M":
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page_size *= 1024 * 1024
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size = num_pages * page_size
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last_addr = addr + size - 1
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result.append(
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named(
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(addr, last_addr, size, num_pages, page_size),
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"addr last_addr size num_pages page_size",
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)
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)
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addr += size
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return result
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def list_dfu_devices(*args, **kwargs):
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"""Prints a lits of devices detected in DFU mode."""
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devices = get_dfu_devices(*args, **kwargs)
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if not devices:
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raise SystemExit("No DFU capable devices found")
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for device in devices:
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print(
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"Bus {} Device {:03d}: ID {:04x}:{:04x}".format(
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device.bus, device.address, device.idVendor, device.idProduct
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)
|
|
)
|
|
layout = get_memory_layout(device)
|
|
print("Memory Layout")
|
|
for entry in layout:
|
|
print(
|
|
" 0x{:x} {:2d} pages of {:3d}K bytes".format(
|
|
entry["addr"], entry["num_pages"], entry["page_size"] // 1024
|
|
)
|
|
)
|
|
|
|
|
|
def write_elements(elements, mass_erase_used, progress=None):
|
|
"""Writes the indicated elements into the target memory,
|
|
erasing as needed.
|
|
"""
|
|
|
|
mem_layout = get_memory_layout(__dev)
|
|
for elem in elements:
|
|
addr = elem["addr"]
|
|
size = elem["size"]
|
|
data = elem["data"]
|
|
elem_size = size
|
|
elem_addr = addr
|
|
if progress and elem_size:
|
|
progress(elem_addr, 0, elem_size)
|
|
while size > 0:
|
|
write_size = size
|
|
if not mass_erase_used:
|
|
for segment in mem_layout:
|
|
if addr >= segment["addr"] and addr <= segment["last_addr"]:
|
|
# We found the page containing the address we want to
|
|
# write, erase it
|
|
page_size = segment["page_size"]
|
|
page_addr = addr & ~(page_size - 1)
|
|
if addr + write_size > page_addr + page_size:
|
|
write_size = page_addr + page_size - addr
|
|
page_erase(page_addr)
|
|
break
|
|
write_memory(addr, data[:write_size], progress, elem_addr, elem_size)
|
|
data = data[write_size:]
|
|
addr += write_size
|
|
size -= write_size
|
|
if progress:
|
|
progress(elem_addr, addr - elem_addr, elem_size)
|
|
|
|
|
|
def cli_progress(addr, offset, size):
|
|
"""Prints a progress report suitable for use on the command line."""
|
|
width = 25
|
|
done = offset * width // size
|
|
print(
|
|
"\r0x{:08x} {:7d} [{}{}] {:3d}% ".format(
|
|
addr, size, "=" * done, " " * (width - done), offset * 100 // size
|
|
),
|
|
end="",
|
|
)
|
|
try:
|
|
sys.stdout.flush()
|
|
except OSError:
|
|
pass # Ignore Windows CLI "WinError 87" on Python 3.6
|
|
if offset == size:
|
|
print("")
|
|
|
|
|
|
def main():
|
|
"""Test program for verifying this files functionality."""
|
|
global __verbose
|
|
# Parse CMD args
|
|
parser = argparse.ArgumentParser(description="DFU Python Util")
|
|
parser.add_argument(
|
|
"-l", "--list", help="list available DFU devices", action="store_true", default=False
|
|
)
|
|
parser.add_argument("--vid", help="USB Vendor ID", type=lambda x: int(x, 0), default=None)
|
|
parser.add_argument("--pid", help="USB Product ID", type=lambda x: int(x, 0), default=None)
|
|
parser.add_argument(
|
|
"-m", "--mass-erase", help="mass erase device", action="store_true", default=False
|
|
)
|
|
parser.add_argument(
|
|
"-u", "--upload", help="read file from DFU device", dest="path", default=False
|
|
)
|
|
parser.add_argument("-x", "--exit", help="Exit DFU", action="store_true", default=False)
|
|
parser.add_argument(
|
|
"-v", "--verbose", help="increase output verbosity", action="store_true", default=False
|
|
)
|
|
args = parser.parse_args()
|
|
|
|
__verbose = args.verbose
|
|
|
|
kwargs = {}
|
|
if args.vid:
|
|
kwargs["idVendor"] = args.vid
|
|
|
|
if args.pid:
|
|
kwargs["idProduct"] = args.pid
|
|
|
|
if args.list:
|
|
list_dfu_devices(**kwargs)
|
|
return
|
|
|
|
init(**kwargs)
|
|
|
|
command_run = False
|
|
if args.mass_erase:
|
|
print("Mass erase...")
|
|
mass_erase()
|
|
command_run = True
|
|
|
|
if args.path:
|
|
elements = read_dfu_file(args.path)
|
|
if not elements:
|
|
print("No data in dfu file")
|
|
return
|
|
print("Writing memory...")
|
|
write_elements(elements, args.mass_erase, progress=cli_progress)
|
|
|
|
print("Exiting DFU...")
|
|
exit_dfu()
|
|
command_run = True
|
|
|
|
if args.exit:
|
|
print("Exiting DFU...")
|
|
exit_dfu()
|
|
command_run = True
|
|
|
|
if command_run:
|
|
print("Finished")
|
|
else:
|
|
print("No command specified")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|
|
|