Hi everyone, I've been trying to deploy some standalone code from Simulink on a Raspberry Pi 4B but I am having some issues. My application requires the generated code to read from a file within the directory, and also write to a file within the directory on the Raspberry Pi. There doesn't appear to be any blocks that can do this, so I wrote some code in a Matlab Function block with some guidance from one of the examples that came with the toolbox. My model builds and is sent to the device no issues, but there are two errors that occur at Run Time and I haven't found any useful solutions to the issues in the documentation or online anywherer yet. I tried running it in externel mode with "Monitor and Tune", as well as the "Build, Deploy, and Start".
Right now I am trying to make a very basic model run, It has a Matlab Function block for reading a file, a Matlab Function block for writing to a file, and one display block for when I was trying to run it in Externel mode. Here are the codes:
Read Function:
function output = ReadFromFile()
coder.cinclude('stdio.h');
filename = 'SimulinkInputTest.txt';
fid = coder.opaque('FILE *');
fid = coder.ceval('fopen', filename, ['r', 0]);
output = coder.nullcopy(0.0);
coder.ceval('fscanf', fid, coder.const('%f'), coder.wref(output));
coder.ceval('fclose', fid);
Write Function:
function appendToTextFile(value)
coder.cinclude('stdio.h');
filename = 'SimulinkOutputTest.txt';
fd = coder.opaque('FILE *');
fd = coder.ceval('fopen', filename, ['a', 0]);
coder.ceval('fprintf', fd, '%g\n', value);
coder.ceval('fclose', fd);
And this is a picture of the Model:
And here is the error:
Error occurred while executing External Mode MEX-file 'ext_comm': ExtTargetPktPending() call failed while checking for target pkt
Component:Simulink | Category:Block diagram error
Error occurred while executing External Mode MEX-file 'ext_comm': ExtSetTargetPkt() call failed on CLOSE. Ensure target is still running
Component:Simulink | Category:Block diagram error.
I am connected to the Pi with an ethernet cable.
I am not sure how to fix this error and get this very basic example working. Thanks for the help in advance.
