How to control stepper motor using STM32MP157?

[GreatPaul]

Hello,

I want to to know how to control the Acceleration and deceleration of stepping motor using stm32mp157, I think It needs config the TIM2(for example) to one pulse mode and update the new period and enable when interrupt occurs (MOTOR_PUL_IRQHandler), but I can not find the interrupt callback function in  Kernel PWM API. is it possible to do the accurate control in core A7? or the part should be done in Core-M?

if in Core-M, how to get the motor position counter in A7? that is may be another topic about the communication between core A and core M?

thanks in advance.

[Olivier GALLIEN]

Hi @GreatPaul​ ,

Sorry to come so late on this post.

Control from Linux or M4 will depend on your need and constraint.

from 100Hz to 1KHz a generic linux could be fine in term of latency and jitter

Above you would need either a Linux RT or offload to M4.

Second solution is the one recommended on STM32MP15.

You will likely benefit of motor control ecosystem of MCU like STM32F4.

Olivier