Adding audio to the Drop CTRL [Bug]

[mikegwatson]

Describe the Bug

I've wired up a low profile piezo/speaker(p/n: AST1109MLQ) to pin PB13 of the Drop CTRL SAMD51J18A uC, but am running into QMK compile errors when using AUDIO_ENABLE = yes in rules.mk. I've included #define AUDIO_PIN B13 in config.h, but perhaps I'm missing something critical...

I receive the following error message:

Compiling: keyboards/massdrop/ctrl/matrix.c In file included from quantum/audio/voices.h:25,
from quantum/audio/audio.h:23,
from quantum/quantum.h:85,
from keyboards/massdrop/ctrl/ctrl.h:3,
from keyboards/massdrop/ctrl/matrix.c:18:
quantum/audio/luts.h:24:14: fatal error: ch.h: No such file or directory
# include <ch.h>
^~~~~~

At face value the compiler doesn't seem to be able to find the file ch.h. Any thoughts or feedback as to why it's not able to find this file. I'm guessing I haven't configured something correctly or am missing a configuration.

Cheers,
Mike

System Information

• Keyboard: MassDrop CTRL
• Operating system: MacOS
• AVR GCC version: 8.4.0
• ARM GCC version: 8.3.1 20190703 (release) [gcc-8-branch revision 273027]
• QMK Firmware version: 0.12.29
• Any keyboard related software installed?
  • AutoHotKey
  • Karabiner
  • Other:

[tzarc]

Audio is impossible on the Massdrop boards without a significant amount of rework, as they produced their own hardware abstraction layer instead of using the current ARM abstraction layer -- ChibiOS.

ChibiOS is what provides the ch.h file -- as such, it's unable to be used with their boards.

QMK is unlikely to entertain any attempt at modifying their abstractions, due to the poor state they're in -- see #11119.

[mikegwatson]

Oh wow! Thank you very much for the explanation @tzarc, that would have taken me quite a while to unravel on my own!