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

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aakash dewangan 2021-9-16

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编辑： aakash dewangan 2021-10-26

采纳的回答： Arun Kumar

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.

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Arun Kumar 2021-9-30

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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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aakash dewangan 2021-10-26

编辑：aakash dewangan 2021-10-26

Thanks Arun for help :)

Knowledge of clock freq helped here.

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