AVTP Control Format (ACF) LIN Example

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The AVTP Control Format (ACF) provides the capability of sending LIN messages over a time-sensitive, AVB network. Use cases include the connection of different LIN buses to a central control unit over an Ethernet backbone.

ACF LIN Transmit

This example VI demonstrates how to construct and send ACF LIN packets. Data is sourced from a function generator and is converted from signal data to XNET LIN Frames. These frames are then encoded into ACF LIN packets and transmitted over the network.

ACF LIN Receive

This example VI monitors the network for ACF packets and decodes them into XNET LIN Frames. The decoded data can be viewed as an array of XNET LIN Frames or as a waveform chart after converting the LIN Frame to signal data.

Packet Format

The parts of an ACF packet are shown below. An ACF packet can contain either a Time-Synchronous Control Format (TSCF) header or a Non Time-Synchronous Control Format (NTSCF) header if the messages are not timing sensitive. This example demonstrates use of the TSCF header.

 After the header comes the ACF payload data, which is comprised of one or more arbitrary ACF messages, which may be of types other than LIN. The LIN ACF message is shown below.

 For more information about ACF, refer to IEEE Std 1722-2016, available for purchase at www.ieee.org.

The contents of the ZIP are shown below: