increasing the sampling frequency in simulink to read input pulses from digital (PWM) pin of arduino

Hi,

I am reading the pulses coming out of a motor to the digital pin of Arduino Uno. The number of pulses that i am getting from the motor are around 20000. But i am not able to count these many pulses in simulink via arduino. Simulink shows very few pulses. Can anyone please tell me the how can i count all the pulses that are fed to digital pin (PWM) of arduino Uno. Or in other words how can i increase the sampling frequency in simulink to count all the pulses.

Answer 1

[Arun Kumar]

Hi Aakash,

The sampling frequency is limited by the microtroller clock frequency which is avr in this case.

A good way to capture the incoming pulse is to use external interrupt block.

If your end goal is to measure frequency/duty cycle, consider using Input capture block.

HTH!

Thanks,

Arun

[aakash dewangan]

Thanks Arun for help :)

Knowledge of clock freq helped here.