541 lines
17 KiB
Python
Executable File
541 lines
17 KiB
Python
Executable File
#!/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 requiringdfu-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 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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# VID/PID
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__VID = 0x0483
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__PID = 0xdf11
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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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# USB device handle
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__dev = 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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import inspect
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if 'length' in inspect.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 init():
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"""Initializes the found DFU device so that we can program it."""
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global __dev
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devices = get_dfu_devices(idVendor=__VID, idProduct=__PID)
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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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# Claim DFU interface
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usb.util.claim_interface(__dev, __DFU_INTERFACE)
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# Clear status
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clr_status()
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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,
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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,
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6, 20000)
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# print (__DFU_STAT[stat[4]], stat)
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return stat[4]
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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,
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"\x41", __TIMEOUT)
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# Execute last command
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_BUSY:
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raise Exception("DFU: erase failed")
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# Check command state
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_IDLE:
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raise Exception("DFU: erase failed")
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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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if get_status() != __DFU_STATE_DFU_DOWNLOAD_BUSY:
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raise Exception("DFU: erase failed")
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# Check command state
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_IDLE:
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raise Exception("DFU: erase failed")
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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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if get_status() != __DFU_STATE_DFU_DOWNLOAD_BUSY:
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raise Exception("DFU: set address failed")
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# Check command state
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_IDLE:
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raise Exception("DFU: set address failed")
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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 ("Addr 0x%x %dKBs/%dKBs..." % (xfer_base + xfer_bytes,
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xfer_bytes // 1024,
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xfer_total // 1024))
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if progress and xfer_count % 256 == 0:
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progress(progress_addr, xfer_base + xfer_bytes - progress_addr,
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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(64, xfer_total-xfer_bytes)
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__dev.ctrl_transfer(0x21, __DFU_DNLOAD, 2, __DFU_INTERFACE,
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buf[xfer_bytes:xfer_bytes + chunk], __TIMEOUT)
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# Execute last command
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_BUSY:
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raise Exception("DFU: write memory failed")
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# Check command state
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_IDLE:
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raise Exception("DFU: write memory failed")
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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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if get_status() != __DFU_STATE_DFU_DOWNLOAD_BUSY:
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raise Exception("DFU: write memory failed")
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# Check command state
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if get_status() != __DFU_STATE_DFU_DOWNLOAD_IDLE:
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raise Exception("DFU: write memory failed")
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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,
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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 ddata.
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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
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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 (not including suffix)
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# B uint8_t targets Number of targets
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dfu_prefix, data = consume('<5sBIB', data,
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'signature version size targets')
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print (" %(signature)s v%(version)d, image size: %(size)d, "
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"targets: %(targets)d" % dfu_prefix)
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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
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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 (not incl prefix)
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# I uint32_t elements Number of elements in the image
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img_prefix, data = consume('<6sBI255s2I', data,
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'signature altsetting named name '
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'size elements')
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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(' %(signature)s %(num)d, alt setting: %(altsetting)s, '
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'name: "%(name)s", size: %(size)d, elements: %(elements)d'
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% img_prefix)
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target_size = img_prefix['size']
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target_data, data = data[:target_size], 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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# < little endian
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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'
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% 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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# < little endian
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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
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dfu_suffix = named(struct.unpack('<4H3sBI', data[:16]),
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'device product vendor dfu ufd len crc')
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print (' 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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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
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intf.bInterfaceSubClass == 1)
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def get_dfu_devices(*args, **kwargs):
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"""Returns a list of USB device which are currently in DFU mode.
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Additional filters (like idProduct and idVendor) can be passed in to
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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,
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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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addr = int(mem_layout[1], 0)
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segments = mem_layout[2].split(',')
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seg_re = re.compile(r'(\d+)\*(\d+)(.)(.)')
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result = []
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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(named((addr, last_addr, size, num_pages, page_size),
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"addr last_addr size num_pages page_size"))
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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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print("No DFU capable devices found")
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return
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for device in devices:
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print("Bus {} Device {:03d}: ID {:04x}:{:04x}"
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.format(device.bus, device.address,
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device.idVendor, device.idProduct))
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layout = get_memory_layout(device)
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print("Memory Layout")
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for entry in layout:
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print(" 0x{:x} {:2d} pages of {:3d}K bytes"
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.format(entry['addr'], entry['num_pages'],
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entry['page_size'] // 1024))
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def write_elements(elements, mass_erase_used, progress=None):
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"""Writes the indicated elements into the target memory,
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erasing as needed.
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"""
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mem_layout = get_memory_layout(__dev)
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for elem in elements:
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addr = elem['addr']
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size = elem['size']
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data = elem['data']
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elem_size = size
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elem_addr = addr
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if progress:
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progress(elem_addr, 0, elem_size)
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while size > 0:
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write_size = size
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if not mass_erase_used:
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for segment in mem_layout:
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if addr >= segment['addr'] and \
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addr <= segment['last_addr']:
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# We found the page containing the address we want to
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# write, erase it
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page_size = segment['page_size']
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page_addr = addr & ~(page_size - 1)
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if addr + write_size > page_addr + page_size:
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write_size = page_addr + page_size - addr
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page_erase(page_addr)
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break
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write_memory(addr, data[:write_size], progress,
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elem_addr, elem_size)
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data = data[write_size:]
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addr += write_size
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size -= write_size
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if progress:
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progress(elem_addr, addr - elem_addr, elem_size)
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def cli_progress(addr, offset, size):
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"""Prints a progress report suitable for use on the command line."""
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width = 25
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done = offset * width // size
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print("\r0x{:08x} {:7d} [{}{}] {:3d}% "
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.format(addr, size, '=' * done, ' ' * (width - done),
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offset * 100 // size), end="")
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sys.stdout.flush()
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if offset == size:
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print("")
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def main():
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"""Test program for verifying this files functionality."""
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global __verbose
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# Parse CMD args
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parser = argparse.ArgumentParser(description='DFU Python Util')
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#parser.add_argument("path", help="file path")
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parser.add_argument(
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"-l", "--list",
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help="list available DFU devices",
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action="store_true",
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default=False
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)
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parser.add_argument(
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"-m", "--mass-erase",
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help="mass erase device",
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action="store_true",
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default=False
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)
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parser.add_argument(
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"-u", "--upload",
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help="read file from DFU device",
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dest="path",
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default=False
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)
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parser.add_argument(
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"-v", "--verbose",
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help="increase output verbosity",
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action="store_true",
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default=False
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)
|
|
args = parser.parse_args()
|
|
|
|
__verbose = args.verbose
|
|
|
|
if args.list:
|
|
list_dfu_devices(idVendor=__VID, idProduct=__PID)
|
|
return
|
|
|
|
init()
|
|
|
|
if args.mass_erase:
|
|
print ("Mass erase...")
|
|
mass_erase()
|
|
|
|
if args.path:
|
|
elements = read_dfu_file(args.path)
|
|
if not elements:
|
|
return
|
|
print("Writing memory...")
|
|
write_elements(elements, args.mass_erase, progress=cli_progress)
|
|
|
|
print("Exiting DFU...")
|
|
exit_dfu()
|
|
return
|
|
|
|
print("No command specified")
|
|
|
|
if __name__ == '__main__':
|
|
main()
|