there are 2 output waveforms at same frequency 25khz. i want to control H-bridge. i have done a lot of research but most of them use build-in function.
can anyone give me an idea how i am able to do that

 

 

You can use pwm, set it to 50% duty cycle and you will have nice square wave.

You can simply tun on and off a digital pin.
25 kHz is period of 40 microseconds, so you need 20 microseconds on, 20 microseconds off. That will give you square wave.

https://www.arduino.cc/en/Tutorial/SecretsOfArduinoPWM

https://playground.arduino.cc/Code/PwmFrequency

 

It appears to me that there is a very small amount of deadtime in the lower trace. Is that intended? If so, it can also be done in code or with hardware. Here is a recent thread on that matter (go to post #10 therein): https://forum.allaboutcircuits.com/threads/complementary-pwm-generator-with-deadtime.151258/

 

Deadtime pretty easy, simple config, one example PSOC -



And some other stuff onchip -




This is low end part, just some of the stuff.

Regards, Dana.

 

ATTINY25 /45/ 85
• Peripheral Features
– 8-bit Timer/Counter with Prescaler and Two PWM Channels
– 8-bit High Speed Timer/Counter with Separate Prescaler
• 2 High Frequency PWM Outputs with Separate Output Compare Registers
• Programmable Dead Time Generator