Duty cycle calculation from simulated square wave in simulink.

[chandresha1]

I want to generate 250Khz analog signals through microcontroller. I am going to use 2Mhz square wave with different duty cycles followed by low-pass filter. I have simulated all these things in simulink and getting square wave with variable frequency according to my requirement.

The problem is i want to know the exact timing when square wave changes its state in order to program my microcontroller. I don't want time-amplitude information at regular interval. I want specifically the time information when square wave changes its state from 1 to 0 and vice versa.

 

[barry]

Your question is unclear. Can you restate it?

 

[chandresha1]

I want to generate 250Khz hanning wave signals through microcontroller. As microcontroller can generate only digital signals, i am using butterworth filter for digital to analog conversion. Therefore i have simulated in simulink required square wave signals in order to generate required hanning wave signal and i got square wave signals with different duty cycles(image attached).

Now if i want to generate different duty cycles from microcontroller than i have to load different numbers in timer every time. Here i am stuck. Because i have simulated square wave signals but i don't have information about time width of each square wave. So i want information from my simulation which could explain me that at what time square wave becomes one and at what time it becomes zero. In short i want time information when my square wave changes its state.

 

[FvM]

You don't tell in which form you want to the "timing information". But it shouldn't be difficult to generate an array with time of all square wave edges.

 

[chandresha1]

Yes, exactly i want an array of time(at edges of square wave) and amplitude in excel or any other document. Could you guide me how can i achieve this?

 

[FvM]

Why don't you post the signal generation code you have so far?