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qmk_firmware/keyboards/meira/readme.md
James Young 62ef4a9c8a
Meira Refactor (#14566) 
* clean up keyboard header files

* use #pragma once include guard
* convert tabs to spaces
* remove redundant #include statements
* update revision references to main header (`../meira.h` -> `meira.h`)

* refactor default keymap

* use LAYOUT as layout macro reference
* use enum statement for layer indexes; make layers contiguous
* use four-space indent
* update keycode grid alignment

* update layout macro aliases

* move layout macro aliases to info.json
  * alias KEYMAP to LAYOUT_ortho_4x12 so the user keymaps don't have to be edited

* touch up meira.h

There's no Planck MIT layout reference here.

* add copyright headers

* workaround patch for grahampheath keymap

The `matrix_init_kb()` function in `meira.c` calls `backlight_set()`, but the grahampheath keymap disables Backlight to make space for Audio, causing the firmware to fail to compile.

This commit wraps the `backlight_set()` call in an ifdef statement, so the call is excluded if Backlight is disabled.

* clean up rules.mk inline comments

* re-order rules.mk settings

* clean up readme.md

* correct link to keyboard image
* change metadata section to unordered list
* spelling corrections
* update make instructions and Docs links
2021-09-23 00:49:02 -07:00

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Meira

Meira

A 4x12 ortholinear low-profile keyboard.

Two controllers are supported: the Pro Micro, and the Adafruit Feather BLE 32u4. Support for each is defined as a hardware revision subfolder in QMK. Main differences include processor frequencies and matrix pinouts.

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

make meira/featherble:default  # for Feather BLE 32u4 controllers
make meira/promicro:default    # for Pro Micro controllers

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

Both the Pro Micro and the Feather BLE use the Caterina bootloader, which is typically programmed using avrdude.

Matrix

In order to have enough pins for the matrix and other functions, a custom matrix is implemented using a demultiplexer to scan the columns. Since the demux is active low, the diodes must be oriented with the cathode connected to the demux pin. When looking at the bottom of the board with the controller at the top right, the cathode mark on the diode should be toward the left.

LED Controller

The in-switch LEDs are driven by an ISSI LED controller (IS31FL3731). The micro controller communicates with this chip using I2C. Individual LED control is possible, but currently only general backlighting support is implemented. This functionality is located in lighting.c, issi.c, and TWILib.c.