Unable to Received Multiframe CAN Data In MATLAB

Hello All, I am unable to receive Multiframe Data in Matlab through J1939 Protocol, Actually when I am Transmit the Multiframe it is not responding the CTS, Could you please help me to solve this problem my code is given below:-

db = canDatabase("J1939.dbc")

pgMultiFrame = j1939ParameterGroup(db, "VehicleDataMulti")

txCh = j1939Channel(db, "MathWorks", "Virtual 1", 1)

rxCh = j1939Channel(db, "MathWorks", "Virtual 1", 2)

start(rxCh);

start(txCh);

transmit(txCh, pgMultiFrame)

pgRx = receive(rxCh, Inf)

when i am going to run this code such kind of warning has been shown

Warning: Transport protocol transmission timed out waiting for Clear To Send notice.

Answer 1

[Anurag Ojha]

Hello Kuber,

According to the warning message after transmitting the multiframe message, you might need to wait for and handle the CTS response explicitly.

Kindly refer to the pseudo code below to handle the CTS response explicitly and modify it as per your requirements.

transmit(txCh, pgMultiFrame) 
% Wait for CTS response 
ctsResponse = receive(rxCh, Inf); 
% Check CTS response and proceed accordingly 
if ~isempty(ctsResponse) && ctsResponse.PGN == j1939ParameterGroup.PGN_CTS 
    % Process CTS response 
    disp('Received CTS. Proceeding with data transmission.'); 
    % Continue with the data transmission steps 
else 
    % Handle case where CTS was not received 
    disp('Did not receive CTS. Transmission may have failed.'); 
end 

I hope this helps!