Embedded matlab function for trigger generation

Hi,

I want to write an Embedded Matlab function with 2 inputs and 1 output.

Input1: an integer Input2: a trigger Output1: a triggered rectangular impulse, the number of its waveforms is determined by input1.

I need this to generate some trigger signals with a determined number.

For example, if input1 = 10 then the output shall generate 10 triggers. These 10 triggers will be used to trigger the Queue block so that I can control how many elements can be accepted by the Queue block.

The code is following:

function y = fcn(u1, u2)  
y = 0;
if u2 == 1
  for i = 1:u1
    if y == 0
      y = 1;
    else
      y = 0;
    end;
  end;
end;

But it outputs only 0. Must I insert some delays?

Thanks Senmeis

Answer 1

[Azzi Abdelmalek]

the loop in your matlab function will only generate the last value of y.

try this

with matlab function

function [y,compt] = fcn(yp,u1,u2,comptp)
%#codegen
compt=(comptp+1)*u2
if yp==0 & compt<=u1 
  y=1
else
  y=0
end

Answer 2

[Owen]

Thank you.

It works but now I want to trigger the generation with a rising edge, so the code

compt=(comptp+1)*u2

shall be changed.

Is there standard function for detection of rising edge?

Thanks Senmeis

[Azzi Abdelmalek]

I suggest that you accept the answer if it answers your first question, then repost another question