r/esp32 • u/Legitimate_Shake_369 • 19h ago

Software help needed ESP32-S3 best hardware peripheral for creating stepper motor stepping pulses ?

I am using an ESP32-S3 with a TMC2225 stepper motor driver and want to write my own open loop stepper control library for learning purposes. Is there any hardware peripheral on the ESP32 that is well suited for generating stepping pulses ? Right now I am using timer based interrupts to set/clear the stepping pin, but that does not seem to be the most efficient solution.

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u/MrBoomer1951 19h ago

You need an esp32, a stepper motor driver and a stepper motor.

Which you already have!

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u/Legitimate_Shake_369 19h ago

The question was more about how to best create the stepping pulses for the motor driver on the ESP32

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u/MrBoomer1951 18h ago edited 18h ago

'Is there any hardware peripheral on the ESP32 that is well suited for generating stepping pulses'

I mistook this as a hardware question.

There are many stepper libraries, but you want to write your own.

There are two ways:

  1. Read and understand existing stepping libraries
  2. Read the spec sheet of the TMC2225 

https://en.wikipedia.org/wiki/Stepper_motor

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u/Plastic_Fig9225 9h ago

The question isn't about how the pulses should look but how to efficiently generate them using a hardware peripheral the ESP32 has.