ldfparser 0.4.0

LDF Language support for Python

LDF Parser

This tool is able parse LIN Description Files, retrieve signal names and frames from them, as well as encoding messages using frame definitions and decoding them.

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Example

import ldfparser

# Load LDF
ldf = ldfparser.LDF(path = "network.ldf")
frame = ldf.frame('Frame_1')

# Get baudrate from LDF
print(ldf.baudrate)

# Encode signal values into frame
message = frame.raw({"Signal_1": 123, "Signal_2": 0})
print(binascii.hexlify(message))
# >> 0x7B00

# Decode message into dictionary of signal names and values
received = bytearray([0x7B, 0x00])
print(frame.parse(received))
# >> {"Signal_1": 123, "Signal_2": 0}

# Encode signal values through converters
message = frame.data({"MotorRPM": 100, "FanState": "ON"}, ldf.converters)
print(binascii.hexlify(message))
# >> 0xFE01

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Features

• Semantic validation of LDF files

• Retrieve header information (version, baudrate)

• Retrieve Signal and Frame information

• Retrieve Signal encoding types and use them to convert values

Currently not supported

• Signals longer than 16 bits

• Ascii and BCD signal values

• Node attributes

• Scheduling table

• Diagnostics

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Installation

Install via pip install ldfparser

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Credits

Inspired by uCAN-LIN LinUSBConverter, specifically the LDF parsing mechanism via Lark

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License