replay

Retransmit messages from CAN bus

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Syntax

replay(canch,msgs)

Description

replay(canch,msgs) retransmits the specified messages on the channel canch, based on the relative differences of their timestamps. The replay function also replays messages from MATLAB® to Simulink®.

To understand the elements of a message, refer to canMessage.

example

Examples

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Use a loopback connection between two channels, so that:

  • The first channel transmits messages 2 seconds apart.

  • The second channel receives them.

  • The replay function retransmits the messages with the original delay.

The timestamp differentials between messages in the two receive arrays, msgRx1 and msgRx2, are equal.

ch1 = canChannel('Vector','CANcaseXL 1',1);
ch2 = canChannel('Vector','CANcaseXL 1',2);
start(ch1)
start(ch2)
msgTx1 = canMessage(500,false,8);
msgTx2 = canMessage(750,false,8);

% The first channel transmits messages 2 seconds apart.
transmit(ch1,msgTx1)
pause(2)
transmit(ch1,msgTx2)
%The second channel receives them
msgRx1 = receive(ch2,Inf);

% The replay function retransmits the messages with the original delay.
replay(ch2,msgRx1)
pause(2)
msgRx2 = receive(ch1,Inf);

Input Arguments

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CAN device channel, specified as a CAN channel object, on which to retransmit.

Example: canChannel('NI','CAN1')

Messages to replay, specified as a timetable of CAN messages, a message object, or an array of message objects.

Version History

Introduced in R2009a

See Also

Functions