lib: add flash_can.py
This script may be used to update Klipper firmware for CAN nodes running the CanBoot bootloader. Signed-off-by: Eric Callahan <arksine.code@gmail.com>
This commit is contained in:
Eric Callahan
KevinOConnor
parent
60625f4422
commit
5ec3939f34
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@ -122,3 +122,9 @@ has been modfied to enable the US code page (437) and enable label
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support. The file "diskio.c" in the original archive is not included
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as it is only serves as an example for how to implement the media api
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callbacks.
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The canboot directory contains code from:
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https://github.com/Arksine/CanBoot
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revision f0d7bb7f9c189de2c22af9eb7210487ed5695f58. The Python module,
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flash_can.py, is taken from the repo's scripts directory. It may be
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used to upload firmware to devices flashed with the CanBoot bootloader.
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@ -0,0 +1,553 @@
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#!/usr/bin/env python3
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# Script to upload software via Can Bootloader
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#
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# Copyright (C) 2022 Eric Callahan <arksine.code@gmail.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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from __future__ import annotations
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import sys
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import os
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import asyncio
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import socket
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import struct
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import logging
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import errno
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import argparse
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import hashlib
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import pathlib
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from typing import Dict, List, Optional, Union
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def output_line(msg: str) -> None:
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sys.stdout.write(msg + "\n")
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sys.stdout.flush()
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def output(msg: str) -> None:
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sys.stdout.write(msg)
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sys.stdout.flush()
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# Standard crc16 ccitt, take from msgproto.py in Klipper
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def crc16_ccitt(buf: Union[bytes, bytearray]) -> int:
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crc = 0xffff
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for data in buf:
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data ^= crc & 0xff
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data ^= (data & 0x0f) << 4
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crc = ((data << 8) | (crc >> 8)) ^ (data >> 4) ^ (data << 3)
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return crc & 0xFFFF
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logging.basicConfig(level=logging.INFO)
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CAN_FMT = "<IB3x8s"
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CAN_READER_LIMIT = 1024 * 1024
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# Canboot Defs
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CMD_HEADER = b'\x01\x88'
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CMD_TRAILER = b'\x99\x03'
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BOOTLOADER_CMDS = {
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'CONNECT': 0x11,
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'SEND_BLOCK': 0x12,
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'SEND_EOF': 0x13,
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'REQUEST_BLOCK': 0x14,
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'COMPLETE': 0x15,
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'GET_CANBUS_ID': 0x16,
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}
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ACK_SUCCESS = 0xa0
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NACK = 0xf1
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# Klipper Admin Defs (for jumping to bootloader)
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KLIPPER_ADMIN_ID = 0x3f0
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KLIPPER_SET_NODE_CMD = 0x01
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KLIPPER_REBOOT_CMD = 0x02
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# CAN Admin Defs
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CANBUS_ID_ADMIN = 0x3f0
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CANBUS_ID_ADMIN_RESP = 0x3f1
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CANBUS_CMD_QUERY_UNASSIGNED = 0x00
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CANBUS_CMD_SET_NODEID = 0x11
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CANBUS_CMD_CLEAR_NODE_ID = 0x12
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CANBUS_RESP_NEED_NODEID = 0x20
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CANBUS_NODEID_OFFSET = 128
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class FlashCanError(Exception):
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pass
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class CanFlasher:
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def __init__(
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self,
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node: CanNode,
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fw_file: pathlib.Path
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) -> None:
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self.node = node
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self.fw_name = fw_file
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self.fw_sha = hashlib.sha1()
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self.file_size = 0
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self.block_size = 64
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self.block_count = 0
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self.app_start_addr = 0
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async def connect_btl(self):
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output_line("Attempting to connect to bootloader")
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ret = await self.send_command('CONNECT')
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pinfo = ret[:12]
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mcu_type = ret[12:]
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ver_bytes, start_addr, self.block_size = struct.unpack("<4sII", pinfo)
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self.app_start_addr = start_addr
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proto_version = ".".join([str(v) for v in reversed(ver_bytes[:3])])
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if self.block_size not in [64, 128, 256, 512]:
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raise FlashCanError("Invalid Block Size: %d" % (self.block_size,))
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while mcu_type and mcu_type[-1] == 0x00:
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mcu_type = mcu_type[:-1]
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mcu_type = mcu_type.decode()
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output_line(
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f"CanBoot Connected\nProtocol Version: {proto_version}\n"
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f"Block Size: {self.block_size} bytes\n"
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f"Application Start: 0x{self.app_start_addr:4X}\n"
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f"MCU type: {mcu_type}"
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)
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async def verify_canbus_uuid(self, uuid):
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output_line("Verifying canbus connection")
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ret = await self.send_command('GET_CANBUS_ID')
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mcu_uuid = sum([v << ((5 - i) * 8) for i, v in enumerate(ret[:6])])
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if mcu_uuid != uuid:
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raise FlashCanError("UUID mismatch (%s vs %s)" % (uuid, mcu_uuid))
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async def send_command(
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self,
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cmdname: str,
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payload: bytes = b"",
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tries: int = 5
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) -> bytearray:
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word_cnt = (len(payload) // 4) & 0xFF
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cmd = BOOTLOADER_CMDS[cmdname]
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out_cmd = bytearray(CMD_HEADER)
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out_cmd.append(cmd)
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out_cmd.append(word_cnt)
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if payload:
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out_cmd.extend(payload)
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crc = crc16_ccitt(out_cmd[2:])
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out_cmd.extend(struct.pack("<H", crc))
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out_cmd.extend(CMD_TRAILER)
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while tries:
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data = bytearray()
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recd_len = 0
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try:
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self.node.write(out_cmd)
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read_done = False
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while not read_done:
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ret = await self.node.readuntil()
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data.extend(ret)
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while len(data) > 7:
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if data[:2] != CMD_HEADER:
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data = data[1:]
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continue
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recd_len = data[3] * 4
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read_done = len(data) == recd_len + 8
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break
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except Exception:
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logging.exception("Can Read Error")
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else:
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trailer = data[-2:]
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recd_crc, = struct.unpack("<H", data[-4:-2])
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calc_crc = crc16_ccitt(data[2:-4])
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recd_ack = data[2]
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cmd_response = 0
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if recd_len:
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cmd_response, = struct.unpack("<I", data[4:8])
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if trailer != CMD_TRAILER:
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logging.info(
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f"Command '{cmdname}': Invalid Trailer Received "
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f"0x{trailer.hex()}"
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)
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elif recd_crc != calc_crc:
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logging.info(
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f"Command '{cmdname}': Frame CRC Mismatch, expected: "
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f"{calc_crc}, received {recd_crc}"
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)
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elif recd_ack != ACK_SUCCESS:
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logging.info(f"Command '{cmdname}': Received NACK")
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elif cmd_response != cmd:
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logging.info(
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f"Command '{cmdname}': Acknowledged wrong command, "
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f"expected: {cmd:2x}, received: {cmd_response:2x}"
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)
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else:
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# Validation passed, return payload sans command
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if recd_len <= 4:
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return bytearray()
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return data[8:recd_len + 4]
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tries -= 1
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# clear the read buffer
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try:
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await self.node.read(1024, timeout=.1)
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except asyncio.TimeoutError:
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pass
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await asyncio.sleep(.1)
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raise FlashCanError("Error sending command [%s] to Can Device"
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% (cmdname))
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async def send_file(self):
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last_percent = 0
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output_line("Flashing '%s'..." % (self.fw_name))
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output("\n[")
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with open(self.fw_name, 'rb') as f:
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f.seek(0, os.SEEK_END)
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self.file_size = f.tell()
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f.seek(0)
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flash_address = self.app_start_addr
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while True:
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buf = f.read(self.block_size)
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if not buf:
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break
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if len(buf) < self.block_size:
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buf += b"\xFF" * (self.block_size - len(buf))
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self.fw_sha.update(buf)
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prefix = struct.pack("<I", flash_address)
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for _ in range(3):
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resp = await self.send_command('SEND_BLOCK', prefix + buf)
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recd_addr, = struct.unpack("<I", resp)
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if recd_addr == flash_address:
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break
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logging.info(
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f"Block write mismatch: expected: {flash_address:4X}, "
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f"received: {recd_addr:4X}"
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)
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await asyncio.sleep(.1)
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else:
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raise FlashCanError(
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f"Flash write failed, block address 0x{recd_addr:4X}"
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)
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flash_address += self.block_size
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self.block_count += 1
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uploaded = self.block_count * self.block_size
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pct = int(uploaded / float(self.file_size) * 100 + .5)
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if pct >= last_percent + 2:
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last_percent += 2.
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output("#")
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resp = await self.send_command('SEND_EOF')
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page_count, = struct.unpack("<I", resp)
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output_line("]\n\nWrite complete: %d pages" % (page_count))
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async def verify_file(self):
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last_percent = 0
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output_line("Verifying (block count = %d)..." % (self.block_count,))
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output("\n[")
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ver_sha = hashlib.sha1()
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for i in range(self.block_count):
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flash_address = i * self.block_size + self.app_start_addr
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for _ in range(3):
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payload = struct.pack("<I", flash_address)
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resp = await self.send_command("REQUEST_BLOCK", payload)
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recd_addr, = struct.unpack("<I", resp[:4])
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if recd_addr == flash_address:
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break
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logging.info(
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f"Block read mismatch: expected: 0x{flash_address:4X}, "
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f"received: 0x{recd_addr}"
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)
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await asyncio.sleep(.1)
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else:
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output_line("Error")
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raise FlashCanError("Block Request Error, block: %d" % (i,))
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ver_sha.update(resp[4:])
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pct = int(i * self.block_size / float(self.file_size) * 100 + .5)
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if pct >= last_percent + 2:
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last_percent += 2
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output("#")
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ver_hex = ver_sha.hexdigest().upper()
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fw_hex = self.fw_sha.hexdigest().upper()
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if ver_hex != fw_hex:
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raise FlashCanError("Checksum mismatch: Expected %s, Received %s"
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% (fw_hex, ver_hex))
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output_line("]\n\nVerification Complete: SHA = %s" % (ver_hex))
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async def finish(self):
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await self.send_command("COMPLETE")
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class CanNode:
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def __init__(self, node_id: int, cansocket: CanSocket) -> None:
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self.node_id = node_id
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self._reader = asyncio.StreamReader(CAN_READER_LIMIT)
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self._cansocket = cansocket
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async def read(
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self, n: int = -1, timeout: Optional[float] = 2
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) -> bytes:
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return await asyncio.wait_for(self._reader.read(n), timeout)
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async def readexactly(
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self, n: int, timeout: Optional[float] = 2
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) -> bytes:
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return await asyncio.wait_for(self._reader.readexactly(n), timeout)
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async def readuntil(
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self, sep: bytes = b"\x03", timeout: Optional[float] = 2
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) -> bytes:
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return await asyncio.wait_for(self._reader.readuntil(sep), timeout)
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def write(self, payload: Union[bytes, bytearray]) -> None:
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if isinstance(payload, bytearray):
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payload = bytes(payload)
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self._cansocket.send(self.node_id, payload)
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async def write_with_response(
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self,
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payload: Union[bytearray, bytes],
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resp_length: int,
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timeout: Optional[float] = 2.
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) -> bytes:
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self.write(payload)
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return await self.readexactly(resp_length, timeout)
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def feed_data(self, data: bytes) -> None:
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self._reader.feed_data(data)
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def close(self) -> None:
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self._reader.feed_eof()
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class CanSocket:
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def __init__(self, loop: asyncio.AbstractEventLoop):
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self._loop = loop
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self.cansock = socket.socket(socket.PF_CAN, socket.SOCK_RAW,
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socket.CAN_RAW)
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self.admin_node = CanNode(CANBUS_ID_ADMIN, self)
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self.nodes: Dict[int, CanNode] = {
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CANBUS_ID_ADMIN_RESP: self.admin_node
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}
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self.input_buffer = b""
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self.output_packets: List[bytes] = []
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self.input_busy = False
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self.output_busy = False
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self.closed = True
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def _handle_can_response(self) -> None:
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try:
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data = self.cansock.recv(4096)
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except socket.error as e:
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# If bad file descriptor allow connection to be
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# closed by the data check
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if e.errno == errno.EBADF:
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logging.exception("Can Socket Read Error, closing")
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data = b''
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else:
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return
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if not data:
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# socket closed
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self.close()
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return
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self.input_buffer += data
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if self.input_busy:
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return
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self.input_busy = True
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while len(self.input_buffer) >= 16:
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packet = self.input_buffer[:16]
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self._process_packet(packet)
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self.input_buffer = self.input_buffer[16:]
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self.input_busy = False
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def _process_packet(self, packet: bytes) -> None:
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can_id, length, data = struct.unpack(CAN_FMT, packet)
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can_id &= socket.CAN_EFF_MASK
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payload = data[:length]
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node = self.nodes.get(can_id)
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if node is not None:
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node.feed_data(payload)
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def send(self, can_id: int, payload: bytes = b"") -> None:
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if can_id > 0x7FF:
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can_id |= socket.CAN_EFF_FLAG
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if not payload:
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packet = struct.pack(CAN_FMT, can_id, 0, b"")
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self.output_packets.append(packet)
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else:
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while payload:
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length = min(len(payload), 8)
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pkt_data = payload[:length]
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payload = payload[length:]
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packet = struct.pack(
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CAN_FMT, can_id, length, pkt_data)
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self.output_packets.append(packet)
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if self.output_busy:
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return
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self.output_busy = True
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asyncio.create_task(self._do_can_send())
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async def _do_can_send(self):
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while self.output_packets:
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packet = self.output_packets.pop(0)
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try:
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await self._loop.sock_sendall(self.cansock, packet)
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except socket.error:
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logging.info("Socket Write Error, closing")
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self.close()
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break
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self.output_busy = False
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def _jump_to_bootloader(self, uuid: int):
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# TODO: Send Klipper Admin command to jump to bootloader.
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# It will need to be implemented
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output_line("Sending bootloader jump command...")
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plist = [(uuid >> ((5 - i) * 8)) & 0xFF for i in range(6)]
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plist.insert(0, KLIPPER_REBOOT_CMD)
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self.send(KLIPPER_ADMIN_ID, bytes(plist))
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async def _query_uuids(self) -> List[int]:
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output_line("Checking for canboot nodes...")
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payload = bytes([CANBUS_CMD_QUERY_UNASSIGNED])
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self.admin_node.write(payload)
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curtime = self._loop.time()
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endtime = curtime + 2.
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self.uuids: List[int] = []
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while curtime < endtime:
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diff = endtime - curtime
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try:
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resp = await self.admin_node.readexactly(8, diff)
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except asyncio.TimeoutError:
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break
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finally:
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curtime = self._loop.time()
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if resp[0] != CANBUS_RESP_NEED_NODEID:
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continue
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app_names = {
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KLIPPER_SET_NODE_CMD: "Klipper",
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CANBUS_CMD_SET_NODEID: "CanBoot"
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}
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app = app_names.get(resp[7], "Unknown")
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data = resp[1:7]
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output_line(f"Detected UUID: {data.hex()}, Application: {app}")
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uuid = sum([v << ((5 - i) * 8) for i, v in enumerate(data)])
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if uuid not in self.uuids and app == "CanBoot":
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self.uuids.append(uuid)
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return self.uuids
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def _reset_nodes(self) -> None:
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output_line("Resetting all bootloader node IDs...")
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payload = bytes([CANBUS_CMD_CLEAR_NODE_ID])
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self.admin_node.write(payload)
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def _set_node_id(self, uuid: int) -> CanNode:
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# Convert ID to a list
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plist = [(uuid >> ((5 - i) * 8)) & 0xFF for i in range(6)]
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plist.insert(0, CANBUS_CMD_SET_NODEID)
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node_id = len(self.nodes) + CANBUS_NODEID_OFFSET
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plist.append(node_id)
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payload = bytes(plist)
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self.admin_node.write(payload)
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||||
decoded_id = node_id * 2 + 0x100
|
||||
node = CanNode(decoded_id, self)
|
||||
self.nodes[decoded_id + 1] = node
|
||||
return node
|
||||
|
||||
async def run(self, intf: str, uuid: int, fw_path: pathlib.Path) -> None:
|
||||
if not fw_path.is_file():
|
||||
raise FlashCanError("Invalid firmware path '%s'" % (fw_path))
|
||||
try:
|
||||
self.cansock.bind((intf,))
|
||||
except Exception:
|
||||
raise FlashCanError("Unable to bind socket to can0")
|
||||
self.closed = False
|
||||
self.cansock.setblocking(False)
|
||||
self._loop.add_reader(
|
||||
self.cansock.fileno(), self._handle_can_response)
|
||||
self._jump_to_bootloader(uuid)
|
||||
await asyncio.sleep(.5)
|
||||
self._reset_nodes()
|
||||
await asyncio.sleep(.5)
|
||||
id_list = await self._query_uuids()
|
||||
if uuid not in id_list:
|
||||
raise FlashCanError(
|
||||
f"Unable to find node matching UUID: {uuid:06x}"
|
||||
)
|
||||
node = self._set_node_id(uuid)
|
||||
flasher = CanFlasher(node, fw_path)
|
||||
await asyncio.sleep(.5)
|
||||
try:
|
||||
await flasher.connect_btl()
|
||||
await flasher.verify_canbus_uuid(uuid)
|
||||
await flasher.send_file()
|
||||
await flasher.verify_file()
|
||||
finally:
|
||||
# always attempt to send the complete command. If
|
||||
# there is an error it will exit the bootloader
|
||||
# unless comms were broken
|
||||
await flasher.finish()
|
||||
|
||||
async def run_query(self, intf: str):
|
||||
try:
|
||||
self.cansock.bind((intf,))
|
||||
except Exception:
|
||||
raise FlashCanError("Unable to bind socket to can0")
|
||||
self.closed = False
|
||||
self.cansock.setblocking(False)
|
||||
self._loop.add_reader(
|
||||
self.cansock.fileno(), self._handle_can_response)
|
||||
self._reset_nodes()
|
||||
await asyncio.sleep(.5)
|
||||
await self._query_uuids()
|
||||
|
||||
def close(self):
|
||||
if self.closed:
|
||||
return
|
||||
self.closed = True
|
||||
for node in self.nodes.values():
|
||||
node.close()
|
||||
self._loop.remove_reader(self.cansock.fileno())
|
||||
self.cansock.close()
|
||||
|
||||
def main():
|
||||
parser = argparse.ArgumentParser(
|
||||
description="Can Bootloader Flash Utility")
|
||||
parser.add_argument(
|
||||
"-i", "--interface", default="can0", metavar='<can interface>',
|
||||
help="Can Interface"
|
||||
)
|
||||
parser.add_argument(
|
||||
"-f", "--firmware", metavar="<klipper.bin>",
|
||||
default="~/klipper/out/klipper.bin",
|
||||
help="Path to Klipper firmware file")
|
||||
parser.add_argument(
|
||||
"-u", "--uuid", metavar="<uuid>", default=None,
|
||||
help="Can device uuid"
|
||||
)
|
||||
parser.add_argument(
|
||||
"-q", "--query", action="store_true",
|
||||
help="Query Bootloader Device IDs"
|
||||
)
|
||||
parser.add_argument(
|
||||
"-v", "--verbose", action="store_true",
|
||||
help="Enable verbose responses"
|
||||
)
|
||||
|
||||
args = parser.parse_args()
|
||||
if not args.verbose:
|
||||
logging.getLogger().setLevel(logging.CRITICAL)
|
||||
intf = args.interface
|
||||
fpath = pathlib.Path(args.firmware).expanduser().resolve()
|
||||
loop = asyncio.get_event_loop()
|
||||
try:
|
||||
cansock = CanSocket(loop)
|
||||
if args.query:
|
||||
loop.run_until_complete(cansock.run_query(intf))
|
||||
else:
|
||||
if args.uuid is None:
|
||||
raise FlashCanError(
|
||||
"The 'uuid' option must be specified to flash a device"
|
||||
)
|
||||
uuid = int(args.uuid, 16)
|
||||
loop.run_until_complete(cansock.run(intf, uuid, fpath))
|
||||
except Exception as e:
|
||||
logging.exception("Can Flash Error")
|
||||
sys.exit(-1)
|
||||
finally:
|
||||
if cansock is not None:
|
||||
cansock.close()
|
||||
if args.query:
|
||||
output_line("Query Complete")
|
||||
else:
|
||||
output_line("CAN Flash Success")
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
Loading…
Reference in New Issue