MATLAB: How to create a sawtooth signal inside an S-function

Question

Hi,

I'm working with C-MEX S-function (C code). I was wondering if it is possible to create a sawtooth signal inside a C-coded S-function and see the signal with the Simulink scope. If it is possible, how to do it ?

Thanks for your help

Answer 1

A simple demonstration:

1. Drag a S-function builder block in the model.
2. Configure S-function having only 1 output (y[0]). No input, No discrete state, No continuous state.
3. In the output function write code given below
4. Build the S-function and run the model.

y0[0] = y0[0]+1;
if(y0[0]>UPPER_LIMIT)
{
    y0[0] = 0;
}