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luni64 / TeensyStep

Fast Stepper Motor Library for Teensy boards
https://luni64.github.io/TeensyStep/
MIT License
272 stars 56 forks source link

Does this work with the TeensyLC (MKL26Z64) #140

Closed payor-ma closed 2 years ago

payor-ma commented 2 years ago

Hello, just wondering if this works with the teensyLC boards? I had a brief scroll through the timer stuff and it looks like at this stage there's a generic implementation through the Arduino standard libraries, and an ARM-specific implementation that's caught by the teensy3.2-4 processor flags. So I would guess that the teensyLC would compile to use the generic timer implementation thru Arduino.h. Is there a performance hit with that vs the ARM-specific implementation?

luni64 commented 2 years ago

The used timers are specific to the processor. Unfortunately the LC has a limited set of timers so that won't work out of the box. It might be possible to do something for the LC but frankly, this is not on my priority list

payor-ma commented 2 years ago

That's no problem. I'm looking to run one motor with a teensyLC thru either a step/dir interface or a uart interface (with a bit of hardware hacking), and I was considering my options. Only if you're happy to answer some more questions: From what I've read the TeensyLC's PWM timers are TPM not FTM, and it has 2 instead of 4 PIT timers. It looks like a lot of the FTM timer code has catches for using TPM or FTM timers, are there any hardware capability issues using TPM? Briefly looking through the repo it looks like the 4 PIT timers are coded in for the teensy implementations of the timers. What are these 4 used for and would it be possible to use only 2?