Read UDP packets asynchronously from Simulink in MATLAB

I have a very simple setup where I am generating a sine wave in simulink and sending it through a UDP block.

On the other hand I have MATLAB where I want to asynchronously fire a callback as soon as a packet is received.

On simulink I have my remote address set to 127.0.0.1 and my port to 25000.

In MATLAB I am using the following code.

u = udp('127.0.0.1', 25000);
u.ReadAsyncMode = 'continuous';
fopen(u);
u.BytesAvailableFcn = 'myfunction';

where myfunction simply prints a string.

However the callback is not being executed at all (it does work with echoudp). What could I be doing wrong?

Answer 1

[Michael]

I belive you need to use the function handle for myfunction

u = udp('127.0.0.1', 25000);
u.ReadAsyncMode = 'continuous';
fopen(u);
u.BytesAvailableFcn = @myfunction


function [] = myfunction(event, obj)
disp('Callback worked!')
end