C6 Feedback

[gmint]

I noticed that the status of the ESP32-C6 is currently listed as "untested." With IDF-5.3.0 I can confirm that I have it working with one stepper motor and the MCPWM_PCNT driver. I've used it with RMT as well and it also works. It does seem that I lose some step precision when moving backwards on occasion and I have not tried to resolve this with the suggestions given elsewhere regarding the connection of the driver as I am currently working around this issue. If there is anything else that I can help with as far as testing this configuration, I am willing to give it a try!

[gin66]

Thanks for sharing, that it is working on your side.

For rmt driver on espidf5.3 is as expected, But the mcpwm/pcnt driver should actually not be available. Wonder what here is going on. Could you please check ?

For the step loosing issue: you could attach a pulse counter and double check, that pulses are not lost from the electronics/SW side.

[gmint]

Hmm, interesting. I have it specified and it's not erroring out but I guess I can't be certain that it's actually using that driver. I'll try to diagnose a little bit more. I was actually trying to use the MCPWM/PCNT driver because it looked to me like that automatically attached the pulse counter and unfortunately my (a.k.a. ChatGPT's) programming skills were insufficient to figure out how to actually attache the pulse counter when using RMT. But if you give me some sort of direction, I'm more than happy to help.

[gin66]

FastAccelStepper provides few API calls for this:

bool attachToPulseCounter(uint8_t unused_pcnt_unit = 0,
                            int16_t low_value = -16384,
                            int16_t high_value = 16384);
  int16_t readPulseCounter();
  void clearPulseCounter();
  bool pulseCounterAttached()

Just call stepper->attachPulseCounter(). The unused_pcnt_unit is not used in the call anymore and only kept for backward compatibility for now.