MATLAB: UDP compilation error in State-flow

Question

Hi.

I have linked an Arduino to Matlab using UDP as:

u = udp('10.0.0.177','RemotePort',8888,'LocalPort',9060); %Udp-protocol
fopen(u); %open tow
status = fscanf(u,'%s'); %read protocol as string
fclose(u); %close tow
delete(u); %delete protocol, release port

This worked fine until I wanted to call this as a function in State-flow. State-flow compiles the functions to C code and the udp function does not compile.

I tried to use compilible dsp.UDPReceiver as:

H = dsp.UDPReceiver('RemoteIPAddress','10.0.0.177','LocalIPPort',9060);
status = step(H);
release(H);

but this does not work. I found that step does not accept string, but the Arduino seems to only be able to send strings.

I also tried using the UDPReceiver block in Simulink but with very strange results. I receive numbers that dont match what is sent.

So I would like to either be able to compile the udp function or send strings via UDPReceiver, can anyone help me with that I would realy appreciate it.

/Martin

Answer 1

Answering my own question.

I was unable to get dsp.UDP working, instead I had to move the UDP communication outside State-flow into Simulink (using flags for commands) and call it as an embedded Matlab function.

Not optimal, but it seems to work.