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hhkb: Change document

master
tmk 2015-05-13 17:26:24 +09:00
parent 1ed54a5dc9
commit 8e7153d190
1 changed files with 11 additions and 10 deletions
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21
keyboard/hhkb/doc/HHKB.txt
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@ -31,27 +31,28 @@ 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. Vcc and GND use 3(2) lines each, other lines are for keyboard signaling.
HHKB connector lines: HHKB connector lines:
JP Pro2 Pro Function Description Teensy++ pins JP Pro2 Pro Function Description TMK pin usage
-------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------
1 Vcc(5V) 5V 1 Vcc(5V) 5V
1 1 2 Vcc(5V) 5V 1 1 2 Vcc(5V) 5V
2 2 3 Vcc(5V) 5V 2 2 3 Vcc(5V) 5V
3 3 4 TP1684 KEY: Low(0) when key pressed PE6 input(with pullup) 3 3 4 TP1684 ~KEY: Low(0) when key is pressed PD7 input(with pullup)
4 4 5 TP1684 KEY_PREV: make threshold PE7 output 4 4 5 TP1684 HYS: High(1) when key is pressed PB7 output
5 5 6 HC4051 A(bit0)\ PB0 output 5 5 6 HC4051 A(bit0)\ PB0 output
6 6 7 HC4051 B(bit1) > select row 0-7 PB1 output 6 6 7 HC4051 B(bit1) > select row 0-7 PB1 output
7 7 8 HC4051 C(bit2)/ PB2 output 7 7 8 HC4051 C(bit2)/ PB2 output
8 8 9 LS145 A(bit0)\ PB3 output 8 8 9 LS145 A(bit0)\ PB3 output
9 9 10 LS145 B(bit1) > select column 0-7 PB4 output 9 9 10 LS145 B(bit1) > select column 0-7 PB4 output
10 10 11 LS145 C(bit2)/ PB5 output 10 10 11 LS145 C(bit2)/ PB5 output
11 11 12 LS145 D(enable) Low(0) enables selected column PB6 output 11 11 12 LS145 ~D(enable) Low(0) enables selected column PB6 output
12 12 13 GND GND 12 12 13 GND GND
13 13 14 GND GND 13 13 14 GND GND
15 GND 15 GND
14 HC4051(Z2) ~Enable of Z2 row0-7 14 HC4051(Z2) ~Enable of Z2 row0-7 PC6
15 HC4051(Z3) ~Enable of Z3 row8-15 15 HC4051(Z3) ~Enable of Z3 row8-15 PC7
NOTE: guessing pin5(KEY_PREV) may work for hysteresis of capacitive sensing. 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: 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. NOTE: JP has two HC4051(Z2,Z3) and line 5, 6 and 7 are connected to both of them.
@ -112,7 +113,7 @@ Matrix diagram:
| <-+ | <6-------|-|-|-|-|-|-|-|--|R|-+ | <-+ | <6-------|-|-|-|-|-|-|-|--|R|-+
| 1 4 | | | <7-------|-|-|-|-|-|-|-|--|R|-+ | 1 4 | | | <7-------|-|-|-|-|-|-|-|--|R|-+
+---V---^-+ | +-^-^-^--+ 0 1 2 3 4 5 6 7 33K*8 +---V---^-+ | +-^-^-^--+ 0 1 2 3 4 5 6 7 33K*8
KEY PREV | A B C +-----------------+ KEY HYS | A B C +-----------------+
| | +-^----+ | | | | LS145 | | | +-^----+ | | | | LS145 |
Vcc | | |BU9831| | | | +-^--^--^--^------+ Vcc | | |BU9831| | | | +-^--^--^--^------+
--- | | +------+ | | | A B C D +-------+ --- | | +------+ | | | A B C D +-------+
@ -138,7 +139,7 @@ Matrix diagram:
| | +----> <6-----------|-|-|-|-|----|R|-+ | | +----> <6-----------|-|-|-|-|----|R|-+
| | | | | A B C <7-----------|-|-|-|-|----|R|-+ | | | | | A B C <7-----------|-|-|-|-|----|R|-+
+---V---^-+ | | +-^-^-^--+ | | | | | | +---V---^-+ | | +-^-^-^--+ | | | | | |
KEY PREV | | | | | | | | | | | KEY HYS | | | | | | | | | | |
| | | | +--------+ | | | | | | | | | | +--------+ | | | | | |
| | | | | HC4051 <8-----------|-|-|-|-|----|R|-+ | | | | | HC4051 <8-----------|-|-|-|-|----|R|-+
| | | | | Z3 <9-----------|-|-|-|-|----|R|-+ | | | | | Z3 <9-----------|-|-|-|-|----|R|-+
@ -192,7 +193,7 @@ Signals charts
0123456701234567 selected column 0123456701234567 selected column
3) Wait 5us after column select, then set prev, strobe colD to spit out key status and read it. 3) Wait 5us after column select, then set prev, strobe colD to spit out key status and read it.
prev _~~~~_____ 20us if previous key state is low hys _~~~~_____ 20us if previous key state is low
colD ~~~__~~~~~ 10us strobe colD ~~~__~~~~~ 10us strobe
key ~~~____~~~ 22us indicates current state of the key key ~~~____~~~ 22us indicates current state of the key