myHHKB

Sparkfun Pro Micro (Arduino leonardo) + TMK firmware + HHKB

Features

• Download with Arduino bootloader
• Use TMK keyboard library

Requirement

• install make
• Install Arduino
• Add avr-gcc to PATH /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/
• clone git submodule

Downloading

cd keyboard/hhkb
make claean
# compile for keymap_????.c
make KEYMAP=????  
# let pro micro enter bootloader mode
# download
python downloader.py

For first time use, you can enter bootloader mode by pulling the RST pin low.

HHKB connector lines:

JP	Pro2	Pro	Function	Description	TMK pin usage	Sparkfun Pro micro pin
		1	Vcc(5V)		5V	VCC
1	1	2	Vcc(5V)		5V	VCC
2	2	3	Vcc(5V)		5V	VCC
3	3	4	TP1684	~KEY: Low(0) when key is pressed	PD7 input(with pullup)	6
4	4	5	TP1684	HYS: High(1) when key is pressed	PB7 output	7
5	5	6	HC4051	A(bit0)\	PB0 output	A2
6	6	7	HC4051	B(bit1) > select row 0-7	PB1 output	A1
7	7	8	HC4051	C(bit2)/	PB2 output	A0
8	8	9	LS145	A(bit0)\	PB3 output	14
9	9	10	LS145	B(bit1) > select column 0-7	PB4 output	8
10	10	11	LS145	C(bit2)/	PB5 output	9
11	11	12	LS145	~D(enable) Low(0) enables selected column	PB6 output	10
12	12	13	GND		GND	GND
13	13	14	GND		GND	GND
		15	GND
14			HC4051(Z2)	~Enable of Z2 row0-7	PC6	X
15			HC4051(Z3)	~Enable of Z3 row8-15	PC7	X