Generating a square wave

Hi...

I would like to know how to generate a square wave in Simulink with variable frequency, that is, I should be able to change the frequency of that square wave externally. The square wave generator from the Simulink library is not useful for my purpose.

Regards.

Answer 1

[Hildo]

1. Use the block "clock" that output to you the simulation time;
2. Get the rest of the division of this time by your period https://www.mathworks.com/matlabcentral/answers/7260-how-to-get-the-remainder-of-a-division-in-simulink;
3. Use the "switch block" to check if is the first part (HIGH level) of the period (output 0 or 1).