pyblhost

Developed by Kristian Sloth Lauszus, 2020-2022

The code is released under the GNU General Public License v3.0.

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This is a Python implementation of blhost used to communicate with the NXP MCUBOOT/KBOOT bootloader.

For now it only implements a subset of the blhost commands.

Currently serial and CAN-Bus interfaces are supported.

Installation

pip install pyblhost

Hid dev

sudo apt-get install libhidapi-hidraw0

Usage

Python

See the examples directory for Python examples.

CLI

$ pyblhost -h
usage: pyblhost [-tx TX_ID] [-rx RX_ID] [-i INTERFACE] [-l CHANNEL] [-p PORT] [-h] [--version] [-B BINARY] [-s START_ADDRESS] [-c BYTE_COUNT] [-t TIMEOUT] [-r CMD_REPEAT] [-b BAUDRATE] {can,serial} {upload,read,ping,reset}

positional arguments:
  {can,serial}          Communicate with the target via either CAN or serial
  {upload,read,ping,reset}
                        upload: write BINARY to START_ADDRESS. Before writing it will erase the memory from START_ADDRESS to START_ADDRESS + BYTE_COUNT
                        read: read memory from START_ADDRESS to START_ADDRESS + BYTE_COUNT. the read data will be stored in BINARY
                        ping: send a ping command to the target and check for a response
                        reset: send a reset command to the target and check for a response

required CAN arguments:
  -tx TX_ID, --tx-id TX_ID
                        The TX ID (in hex) to use for CAN
  -rx RX_ID, --rx-id RX_ID
                        The RX ID (in hex) to use for CAN

optional CAN arguments:
  -i INTERFACE, --interface INTERFACE
                        The CAN-Bus interface to use (default "socketcan")
  -l CHANNEL, --channel CHANNEL
                        The CAN-Bus channel to use (default "can0")

required serial arguments:
  -p PORT, --port PORT  The port to use for serial

optional arguments:
  -h, --help            Show this help message and exit
  --version             Show program's version number and exit
  -B BINARY, --binary BINARY
                        The binary to upload or write memory into
  -s START_ADDRESS, --start-address START_ADDRESS
                        The address (in hex) to upload the binary at or read memory from
  -c BYTE_COUNT, --byte-count BYTE_COUNT
                        The number of bytes (in hex) to erase/read
  -t TIMEOUT, --timeout TIMEOUT
                        The time to wait in seconds for a response (default 1.0)
  -r CMD_REPEAT, --cmd-repeat CMD_REPEAT
                        The number of times to try to establish a connection (default 3)
  -b BAUDRATE, --baudrate BAUDRATE, --bitrate BAUDRATE
                        The baudrate/bitrate to use for serial/can (default 500000)

Upload

pyblhost can upload -tx 0x123 -rx 0x321 -B blink.bin -s 0x4C000 -c 0x34000

pyblhost serial upload -p /dev/ttyUSB0 -b 500000 -B blink.bin -s 0x4C000 -c 0x34000

Read

pyblhost can read -tx 0x123 -rx 0x321 -B memory.bin -s 0xC000 -c 0x34000

pyblhost serial read -p /dev/ttyUSB0 -b 500000 -B memory.bin -s 0xC000 -c 0x34000

Ping

pyblhost can ping -tx 0x123 -rx 0x321

pyblhost serial ping -p /dev/ttyUSB0 -b 500000

Reset

pyblhost can reset -tx 0x123 -rx 0x321

pyblhost serial reset -p /dev/ttyUSB0 -b 500000