tmk
commented
7 years ago If you can't use PB4, you will have to write that part yourself and know how controller works. See this doc to know HHKB internals, especially pin configuration. https://github.com/tmk/tmk_keyboard/blob/master/keyboard/hhkb/doc/HHKB.txt I can't tell you how to change code, it depends on your pin configuration.
This is default pinconfiguration.
Connector Cable
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Two PCBs are connected by 15 lines(13 in case of Pro2).
Vcc and GND use 3(2) lines each, other lines are for keyboard signaling.
HHKB connector lines:
JP Pro2 Pro Function Description TMK pin usage
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1 Vcc(5V) 5V
1 1 2 Vcc(5V) 5V
2 2 3 Vcc(5V) 5V
3 3 4 TP1684 ~KEY: Low(0) when key is pressed PD7 input(with pullup)
4 4 5 TP1684 HYS: High(1) when key is pressed PB7 output
5 5 6 HC4051 A(bit0)\ PB0 output
6 6 7 HC4051 B(bit1) > select row 0-7 PB1 output
7 7 8 HC4051 C(bit2)/ PB2 output
8 8 9 LS145 A(bit0)\ PB3 output
9 9 10 LS145 B(bit1) > select column 0-7 PB4 output
10 10 11 LS145 C(bit2)/ PB5 output
11 11 12 LS145 ~D(enable) Low(0) enables selected column PB6 output
12 12 13 GND GND
13 13 14 GND GND
15 GND
14 HC4051(Z2) ~Enable of Z2 row0-7 PC6
15 HC4051(Z3) ~Enable of Z3 row8-15 PC7
NOTE: Probably HYS changes threshold for upstroke and makes hysteresis in the result.
NOTE: HYS should be given High(1) when previous KEY state is Low(0).
NOTE: 1KOhm didn't work as pullup resistor on KEY. AVR internal pullup or 10KOhm resistor was OK.
NOTE: JP has two HC4051(Z2,Z3) and line 5, 6 and 7 are connected to both of them.
(HHKB_connector.jpg)
Thank you for the great work! I don't have a Teensy 2.0 board, but some modules like this:
https://wiki.microduino.cc/index.php/Microduino-Module_CoreUSB
This board doesn't have PB4 pinout, how can I change PB4 to another pin? Thank you!
I tried to edit this line, but I've no idea how to make it right.
PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);https://github.com/tmk/tmk_keyboard/blob/master/keyboard/hhkb/hhkb_avr.h#L86