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midilab / uClock

A tight BPM clock generator for Arduino and PlatformIO using hardware timer interruption. AVR, Teensy, STM32xx, ESP32 and RP2040 support
https://midilab.co/umodular
MIT License
165 stars 22 forks source link

Teensy support? #2

Closed grayxr closed 4 years ago

grayxr commented 4 years ago

Looks like some of the core AVR timer code won't work with the Teensy boards, per Paul's answer here: https://forum.pjrc.com/threads/28490-teensy-3-1-intterupts-error-TCCR1A-was-not-declared-in-this-scope

I assume this library would have to be heavily refactored to support the Teensy boards?

midilab commented 4 years ago

Teensy's above 2.0 are not AVRs, they're all ARM, so different registrers and interruptions.

You can make use of uClock on Teensy 2.0 that has the same microcontroller as arduino leonardo.

I dont have a teensy, but its on my todo list to order a teensy 3.6 and start playing with to code a uClock support for those teensy boards.

I think theres not much of refactor, just a matter of initialize and control correctly any avaliable timmer on teensys ARM boards.

grayxr commented 4 years ago

Thank you @midilab -- I've been trying to get this timer code to work, but I think my interval calculation is wrong: https://gist.github.com/grayxr/fe7b24c2d737763809a553b77b025c26#file-tclock-cpp-L88

Plus, I'd love to use your library for the Teensy because it looks really usable. I wouldn't mind sending you a Teensy 4.1 to experiment with 😄

midilab commented 4 years ago

That will be great, send me a email so we can talk about it. :)

midilab commented 4 years ago

Ok, here it comes the first version of uClock and Teensy arm boards support. I had tested on Teensy LC, but all ARM boards uses the same programming interface for timers, wich should be ok to use on any other Teensy.

Please post tests made on other board other than LC to update the compatibility chart of uClock.

https://github.com/midilab/uClock/releases/tag/0.9.0

grayxr commented 4 years ago

Awesome, thank you!