hhkb: Pin setting for power saving
[tmk_keyboard.git] / keyboard / hhkb / hhkb_avr.h
CommitLineData
60134830 1#ifndef HHKB_AVR_H
2#define HHKB_AVR_H
3
4#include <stdint.h>
5#include <stdbool.h>
6#include <avr/io.h>
7#include <avr/interrupt.h>
8#include <util/delay.h>
9
10
11// Timer resolution check
12#if (1000000/TIMER_RAW_FREQ > 20)
13# error "Timer resolution(>20us) is not enough for HHKB matrix scan tweak on V-USB."
14#endif
15
16
17/*
18 * HHKB Matrix I/O
19 *
20 * row: HC4051[A,B,C] selects scan row0-7
21 * row-ext: [En0,En1] row extention for JP
22 * col: LS145[A,B,C,D] selects scan col0-7 and enable(D)
23 * key: on: 0/off: 1
24 * prev: hysteresis control: assert(1) when previous key state is on
25 */
26
27
28#if defined(__AVR_ATmega32U4__)
29/*
30 * For TMK HHKB alt controller(ATMega32U4)
31 *
32 * row: PB0-2
33 * col: PB3-5,6
34 * key: PD7(pull-uped)
35 * prev: PB7
36 * power: PD4(L:off/H:on)
37 * row-ext: PC6,7 for HHKB JP(active low)
38 */
39static inline void KEY_ENABLE(void) { (PORTB &= ~(1<<6)); }
40static inline void KEY_UNABLE(void) { (PORTB |= (1<<6)); }
41static inline bool KEY_STATE(void) { return (PIND & (1<<7)); }
42static inline void KEY_PREV_ON(void) { (PORTB |= (1<<7)); }
43static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
099701dd 44#ifdef HHKB_POWER_SAVING
45static inline void KEY_POWER_ON(void) {
46 DDRB = 0xFF; PORTB = 0x40; // change pins output
47 DDRD |= (1<<4); PORTD |= (1<<4); // MOS FET switch on
48 /* Without this wait you will miss or get false key events. */
49 _delay_ms(5); // wait for powering up
50}
51static inline void KEY_POWER_OFF(void) {
52 /* input with pull-up consumes less than without it when pin is open. */
53 DDRB = 0x00; PORTB = 0xFF; // change pins input with pull-up
54 DDRD |= (1<<4); PORTD &= ~(1<<4); // MOS FET switch off
55}
56static inline bool KEY_POWER_STATE(void) { return PORTD & (1<<4); }
57#else
60134830 58static inline void KEY_POWER_ON(void) {}
59static inline void KEY_POWER_OFF(void) {}
099701dd 60static inline bool KEY_POWER_STATE(void) { return true; }
61#endif
60134830 62static inline void KEY_INIT(void)
63{
099701dd 64 /* row,col,prev: output */
60134830 65 DDRB = 0xFF;
099701dd 66 PORTB = 0x40; // unable
67 /* key: input with pull-up */
60134830 68 DDRD &= ~0x80;
099701dd 69 PORTD |= 0x80;
60134830 70#ifdef HHKB_JP
71 /* row extention for HHKB JP */
72 DDRC |= (1<<6|1<<7);
c01ecce1 73 PORTC |= (1<<6|1<<7);
f4a20304 74#else
75 /* input with pull up to save power */
76 DDRC &= ~(1<<6|1<<7);
77 PORTC |= (1<<6|1<<7);
60134830 78#endif
79 KEY_UNABLE();
80 KEY_PREV_OFF();
099701dd 81
82 KEY_POWER_OFF();
60134830 83}
84static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
85{
86 PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);
87#ifdef HHKB_JP
88 if ((ROW) & 0x08) PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<6);
89 else PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<7);
90#endif
91}
92
93
94#elif defined(__AVR_AT90USB1286__)
45286631 95/*
60134830 96 * For Teensy++(AT90USB1286)
97 *
45286631 98 * HHKB pro HHKB pro2
99 * row: PB0-2 (6-8) (5-7)
100 * col: PB3-5,6 (9-12) (8-11)
101 * key: PE6(pull-uped) (4) (3)
102 * prev: PE7 (5) (4)
60134830 103 *
104 * TODO: convert into 'staitc inline' function
105 */
106#define KEY_INIT() do { \
107 DDRB |= 0x7F; \
108 DDRE |= (1<<7); \
109 DDRE &= ~(1<<6); \
110 PORTE |= (1<<6); \
111} while (0)
112#define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \
113 (((COL) & 0x07)<<3) | \
114 ((ROW) & 0x07))
115#define KEY_ENABLE() (PORTB &= ~(1<<6))
116#define KEY_UNABLE() (PORTB |= (1<<6))
117#define KEY_STATE() (PINE & (1<<6))
118#define KEY_PREV_ON() (PORTE |= (1<<7))
119#define KEY_PREV_OFF() (PORTE &= ~(1<<7))
120#define KEY_POWER_ON()
121#define KEY_POWER_OFF()
099701dd 122#define KEY_POWER_STATE() true
60134830 123
124
125#else
126# error "define code for matrix scan"
127#endif
128
129
130#if 0
131// For ATMega328P with V-USB
132//
133// #elif defined(__AVR_ATmega328P__)
134// Ports for V-USB
135// key: PB0(pull-uped)
136// prev: PB1
137// row: PB2-4
138// col: PC0-2,3
139// power: PB5(Low:on/Hi-z:off)
140#define KEY_INIT() do { \
141 DDRB |= 0x3E; \
142 DDRB &= ~(1<<0); \
143 PORTB |= 1<<0; \
144 DDRC |= 0x0F; \
145 KEY_UNABLE(); \
146 KEY_PREV_OFF(); \
147} while (0)
148#define KEY_SELECT(ROW, COL) do { \
149 PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \
150 PORTC = (PORTC & 0xF8) | ((COL) & 0x07); \
151} while (0)
152#define KEY_ENABLE() (PORTC &= ~(1<<3))
153#define KEY_UNABLE() (PORTC |= (1<<3))
154#define KEY_STATE() (PINB & (1<<0))
155#define KEY_PREV_ON() (PORTB |= (1<<1))
156#define KEY_PREV_OFF() (PORTB &= ~(1<<1))
157// Power supply switching
158#define KEY_POWER_ON() do { \
159 KEY_INIT(); \
160 PORTB &= ~(1<<5); \
161 _delay_ms(1); \
162} while (0)
163#define KEY_POWER_OFF() do { \
164 DDRB &= ~0x3F; \
165 PORTB &= ~0x3F; \
166 DDRC &= ~0x0F; \
167 PORTC &= ~0x0F; \
168} while (0)
169#endif
170
171#endif
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