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

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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.

Accepted Answer

Arun Kumar
Arun Kumar on 30 Sep 2021
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

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