BB-A4983 (stepper motor driver) and A20

[herter]

Hello,

I want to interface my A20 board with several stepper motors and I need a very good resolution.
That's why, I would like to use the A4983 which works up to a sixteenth-step mode.
I wonder, if I can directly control directly these  from the A20 board, by using also timer/interrupt and without the use of an external microcontroler OLIMEXINO-85S.

I hope you can help me.
Thank in advance,
Best regards.

[herter]

hello,

nobody can help me? 

[Lurch]

Google for RPi and motor control. There are some python examples that may help you get started.

[herter]

ok thanks for your reply, I will try.

[Mouchon]

if you combine this

https://github.com/adafruit/AccelStepper/blob/master/AccelStepper.cpp
with this

https://github.com/lephiloux/oa20gpiolib

You should have the solution.

[herter]

Thanks Mouchon, it's very interesting.
Upon I receive my second board, I hope find the solution.

[herter]

Hello,

Someone can explain me how the bb-A4983 manages the current limiting please?
Indeed, we have no Rsense and the Vref is set to VDD/2?
Thanks for your help.

[giliusp]

Hi Herter,

I would like to do exactly the same: controlling a stepping motor from debian based linuxino a20. Did you manage to get it working?

Kind regards,

Pieter