python_lib

LIN Python lib

Library is under development API will change

Features

• LIN frame transmission / reception
• LDF signals encoding / decoding (only signal and frames currently working, schedule table parsing not implemented, max signal size is 1 byte)
• Works on windows, linux, mac. Supported hardware , uCAN LIN USB CONVERTER

Installation

pip install ucanlintools

Example usage

To load ldf

from ucanlintools.LDF_parser import parseLDF
ldf = parseLDF("D:\\ldfe.ldf") 
message = ldf.get_message_by_name('FRAME_A')
print(message.signals)

To decode/ encode frame

aaa = message.encode({'SIGNAL_A': 1})
bbb = b'\x00\x00\x00\x00\x00\x00'
message.decode(bbb)

To setup LIN USB Converter

lin = ucanlintools.LUC('COM7')
lin.set_frame_rx_handler(rx_any)
lin.set_new_frame_rx_handler(rx_new_data)

lin.openAsMaster()

lin.addReceptionFrameToTable(52,8)
lin.addReceptionFrameToTable(54,8)
lin.enable()

Example data reception handler

def rx_new_data(f):
        global message
        print (hex(f.id) + ": " +(f.data.hex()))
        if (message.id == f.id):
                message.decode(f.data)
                print(message.diff_str())

Example blocking function that can be called in main script to handle KeyboardInterrupt and SystemExit and add code that should be executed after connection is closed. It blocks the script that calls the function but does not interrupt communication threads.

import time

def listen(lin):
    try:
        while lin.isRunning():
            time.sleep(1)
    except (KeyboardInterrupt, SystemExit):
        lin.disable()
        lin.deInitSerial()

For more info see

https://ucandevices.github.io