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By default the `i2c_master` driver for ChibiOS uses the B6 pin for `I2C1_SCL` and the B7 pin for `I2C1_SDA`. However, the ChibiOS board file used for the F401 Blackpill board (`ST_STM32F401C_DISCOVERY`) configures B6 as `I2C1_SCL` and B9 as `I2C1_SDA`, and if that configuration is left unchanged, enabling the `i2c_master` driver results in having two pins (B7 and B9) configured as `I2C1_SDA` at the same time, which does not work properly (experimental results show that the B9 pin still works as `I2C1_SDA` in that case, and the B7 pin does not work). Configure the B9 pin as an input with pull-up in `board_init()`, so that the B7 pin can be configured as `I2C1_SDA` by the I2C driver. |
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| .. | ||
| blackpill_f401 | ||
| blackpill_f411 | ||
| bluepill | ||
| elite_c | ||
| keymaps | ||
| promicro | ||
| proton_c | ||
| pytest | ||
| stm32f0_disco | ||
| teensy_2 | ||
| teensy_2pp | ||
| teensy_32 | ||
| teensy_lc | ||
| config.h | ||
| onekey.c | ||
| onekey.h | ||
| readme.md | ||
| rules.mk | ||
onekey handwired
Custom handwired one key keyboard.
Keyboard Maintainer: QMK Community
Hardware Supported: bluepill, Elite-C, Pro Micro, Proton C, Teensy 2.0, Teensy++ 2.0, Teensy LC, Teensy 3.2
Hardware Availability:
See each individual board for pin infomation
Make example for this keyboard (after setting up your build environment):
make handwired/onekey:default
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.