Timers and Stepper Motor Control

[murray_lang]

Hi Peter,

Yes, if it was just for my pleasure I would go straight to a dedicated stepper driver. However I am working on a prototype that will be manufactured in reasonably large numbers, so what might be a small cost difference for hobby purposes can become significant. Still, when you look at the loss of I/O opportunities in using so many pins for that purpose, the decision is not so straight forward.

A single 8-bit shift register and a single ULN2803 Darlington array will drive two stepper motors, and require only two GPIOs. I think that would be hard to beat cost-wise, but the decision is not made yet.

All good clean fun.

Murray

[Yuggoo]

p.s. Just watched your video on the MPU-6050 and funny enough the project I am working on is a 2 wheel balancing robot! I have gotten the MPU-9250 interfaced with the DMP functions and it is working nicely if anyone is interested.

Hi Jones,
I'm interested on how did you interfaced with the DMP functions, did you used the motion driver? can i take a look at the interface code?

Thanks