qmk_firmware/keyboards/handwired/daskeyboard/daskeyboard4/readme.md

3.7 KiB

daskeyboard4

daskeyboard4pro

PCB

Reverse engineered PCB definition of daskeyboard 4 (Professional)

I used a WeAct Black Pill V3.0 featuring the STM32F401CEU6 processor to replace the keyboard's destroyed controller. This keyboard definition can also be easily adopted to use any other microcontroller compatible with QMK and with sufficient I/O ports.

The layout definition in info.json contains the magic. The rows and columns appear in the pin definition in the order they appear on the 26 pads, where the original ribbon cable was connected. Note: Pad 25 is not connected.

It should work for ANSI as well as ISO variants, although I only tested the latter.

Rotary encoder and LEDs are handwired.

Media key mapping

KC_RGUI (right super key) is used to switch or toggle (double tap) to media layer.
The rotary encoder is used for volume control. mediakeys

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

make handwired/daskeyboard/daskeyboard4:default

Flashing example for this keyboard:

make handwired/daskeyboard/daskeyboard4:default:flash

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

Bootloader

Enter the bootloader in 3 ways:

  • Bootmagic reset: Hold down the key at (5,16) in the matrix (usually the top left key or Escape) and plug in the keyboard
  • Physical reset button: Briefly press the button on the back of the PCB - some may have pads you must short instead
  • Keycode in layout: Press the key mapped to QK_BOOT if it is available

PCB-Pinout

PCB-pin properties STM32F411
1 column, diode, 4 switches C14
2 row, no diode, 13 switches A13
3 row, no diode, 15 switches A14
4 column, diode, 3 switches C15
5 column, diode, 8 switches A0
6 row, no diode, 14 switches A1
7 column, diode, 7 switches A2
8 row, no diode, 13 switches A3
9 column, diode, 7 switches A4
10 column, diode, 7 switches A5
11 column, diode, 8 switches A6
12 column, diode, 8 switches A7
13 column, diode, 7 switches B0
14 column, diode, 7 switches B1
15 column, diode, 7 switches B10
16 column, diode, 7 switches B9
17 row, no diode, 12 switches B8
18 column, diode, 2 switches B7
19 column, diode, 2 switches B6
20 column, diode, 6 switches B5
21 column, diode, 6 switches B4
22 row, no diode, 12 switches B3
23 row, no diode, 10 switches A15
24 row, no diode, 15 switches B15
25 N/C
26 column, diode, 7 switches A8