keychron_qmk_firmware/keyboards/handwired/t111

QMK-based firmware for Fujitsu N860-2500-T111 keyboard

Fujitsu N860-2500-T111 keyboard conversion project: direct connection of Black Pill to the matrix.

• Keyboard Maintainer: DmNosachev
• Hardware Supported: Fujitsu N860-2500-T111, Black Pill STM32F103C8T6 MCU board. Alternatively you can use any MCU which is supported by QMK and has 22 or more IO pins: Arduino Micro, Teensy 2.0, Teensy 2.0++, Blue Pill, etc.
• Thanks to Deskthority user OldIsNew for the matrix decoding.

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

make handwired/t111:default

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

Modding

Matrix

Fujitsu N860-2500-T111 has 14x8 matrix. It's ghost-free thanks to the diodes.

Rows (0-7) and columns (0-D):

Black Pill

Suggested mount position for the Black Pill (view from the top side of the PCB):

  C1  C2  C3  C4  C7  C8  C9  CA                          R5  R6
,--------------------------------------------------------------------,
|B11 B10  B1  B0  A7  A6  A5  A4  A3  A2  A1  A0 RST C13  B9  B8 GND |---,
|                                                                    |USB|
|B12 B13 B14 B15  A8  A9 A10 A11 A12 A15  B3  B4  B5  B6  B7 3V3 GND |---'
'--------------------------------------------------------------------'
      CC  CD  C0  CB  C6  C5          R0  R4  R3  R2  R1  R7

1. Desolder all ICs, capacitors and resistors.
2. Solder 4-pin SWD header to Black Pill.
3. Burn STM32duino bootloader to Black Pill.
4. Compile and flash the firmware: make handwired/t111:default:flash
5. Connect rows and columns to the corresponding pins of the Black Pill.