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* 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 |
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| .. | ||
| keymaps | ||
| rev1 | ||
| rev2 | ||
| rev3 | ||
| rev3_drop | ||
| config.h | ||
| info.json | ||
| preonic.c | ||
| preonic.h | ||
| readme.md | ||
Preonic
A compact 50% (12x5) ortholinear keyboard kit made and sold by OLKB and Massdrop. More info on qmk.fm
Keyboard Maintainer: Jack Humbert
Hardware Supported: Preonic PCB rev1, rev2, rev3
Hardware Availability: OLKB.com, Massdrop
Make example for this keyboard (after setting up your build environment):
make preonic/rev2:default
Install examples:
make preonic/rev2:default:dfu # For Preonic rev1 or rev2
make preonic/rev3:default:dfu-util # For Preonic rev3
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.