qmk_firmware/keyboards/planck/rev6_drop
Stefan Kerkmann 3f5dc47296
[Core] Use polled waiting on ChibiOS platforms that support it (#17607)
* Use polled waiting on platforms that support it

Due to context switching overhead waiting a very short amount of time on
a sleeping thread is often not accurate and in fact not usable for timing
critical usage i.e. in a driver. Thus we use polled waiting for ranges
in the us range on platforms that support it instead. The fallback is
the thread sleeping mechanism.

This includes:

* ARM platforms with CYCCNT register (ARMv7, ARMv8) this is
  incremented at CPU clock frequency
* GD32VF103 RISC-V port with CSR_MCYCLE register this is incremented at
  CPU clock frequency
* RP2040 ARMv6 port which uses the integrated timer peripheral which is
  incremented with a fixed 1MHz frequency

* Use wait_us() instead of chSysPolledDelayX

...as it is powered by busy waiting now.

* Add chibios waiting methods test bench
2022-07-11 15:17:05 +02:00
..
chconf.h
config.h
halconf.h
info.json
matrix.c
mcuconf.h
readme.md
rev6_drop.c
rev6_drop.h
rules.mk

Planck

A compact 40% (12x4) ortholinear keyboard kit made and sold by OLKB and Massdrop. A complete hardware rework of the Planck, sporting a faster and more powerful STM32 ARM Cortex-M4 microcontroller, with support for rotary encoders and three additional layouts. More info on qmk.fm

Make example for this keyboard (after setting up your build environment):

make planck/rev6_drop:default

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.