Touch.begin makes stepper motors "laggy"

How to
1

What do you want to achieve?

I simply want to control 4 steppers in custom sequence and use Arduino GIGA display shield for start and stop the sequence. The problem is that when I call Touch.begin function in void setup, my steppers won’t work smoothly. They are “laggy”, makes vibration and strange sound even though I don’t click anything on the screen. I have tried new empty project without any buttons and it still does the same. If I use buttons whenever I click one looks like my loop gets interupted for split second because I can hear stepper stopping at that moment.
If I comment Touch.begin line, everything runs smoothly again. I also use non interrupting functions for my steppers since screen becomes inactive if I use interrupts and in that case I can not click stop button.

What have you tried so far?

Making new empty project without any buttons.

Screenshot or video

Others

  • SquareLine Studio version: V1.4.0
  • Operating system: Windows 11
  • Target hardware: Arduino GIGA with GIGA display shield
2

you dont show lib for stepper, but any hw critical system need knowledge about manage independent dedicated parts. Isnt for one thread loop code

3

Could you please explain in more details? Didn’t actually understand. I use accelstepper.h library for steppers.

4

Whatever you use, direct code or library, you need to be sure that steppers are timed very precisely. So you need to use high-priority interrupts on your MCU (or dedicated stepper-controller) for stepper ‘step’ controls that are never delayed (significantly) by the main loop where LVGL lv_task_handler runs, instead the motor control should interrupt LVGL and main loop whenever it needs to.

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