7ea6322c738ef371e931a43901e0ae467de50dcc
[tmk_keyboard.git] / keyboard / hhkb / hhkb_avr.h
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 */
39 static inline void KEY_ENABLE(void) { (PORTB &= ~(1<<6)); }
40 static inline void KEY_UNABLE(void) { (PORTB |= (1<<6)); }
41 static inline bool KEY_STATE(void) { return (PIND & (1<<7)); }
42 static inline void KEY_PREV_ON(void) { (PORTB |= (1<<7)); }
43 static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
44 #ifdef HHKB_POWER_SAVING
45 static 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 }
51 static 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 }
56 static inline bool KEY_POWER_STATE(void) { return PORTD & (1<<4); }
57 #else
58 static inline void KEY_POWER_ON(void) {}
59 static inline void KEY_POWER_OFF(void) {}
60 static inline bool KEY_POWER_STATE(void) { return true; }
61 #endif
62 static inline void KEY_INIT(void)
63 {
64 /* row,col,prev: output */
65 DDRB = 0xFF;
66 PORTB = 0x40; // unable
67 /* key: input with pull-up */
68 DDRD &= ~0x80;
69 PORTD |= 0x80;
70 #ifdef HHKB_JP
71 /* row extention for HHKB JP */
72 DDRC |= (1<<6|1<<7);
73 PORTC |= (1<<6|1<<7);
74 #endif
75 KEY_UNABLE();
76 KEY_PREV_OFF();
77
78 KEY_POWER_OFF();
79 }
80 static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
81 {
82 PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);
83 #ifdef HHKB_JP
84 if ((ROW) & 0x08) PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<6);
85 else PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<7);
86 #endif
87 }
88
89
90 #elif defined(__AVR_AT90USB1286__)
91 /*
92 * For Teensy++(AT90USB1286)
93 *
94 * HHKB pro HHKB pro2
95 * row: PB0-2 (6-8) (5-7)
96 * col: PB3-5,6 (9-12) (8-11)
97 * key: PE6(pull-uped) (4) (3)
98 * prev: PE7 (5) (4)
99 *
100 * TODO: convert into 'staitc inline' function
101 */
102 #define KEY_INIT() do { \
103 DDRB |= 0x7F; \
104 DDRE |= (1<<7); \
105 DDRE &= ~(1<<6); \
106 PORTE |= (1<<6); \
107 } while (0)
108 #define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \
109 (((COL) & 0x07)<<3) | \
110 ((ROW) & 0x07))
111 #define KEY_ENABLE() (PORTB &= ~(1<<6))
112 #define KEY_UNABLE() (PORTB |= (1<<6))
113 #define KEY_STATE() (PINE & (1<<6))
114 #define KEY_PREV_ON() (PORTE |= (1<<7))
115 #define KEY_PREV_OFF() (PORTE &= ~(1<<7))
116 #define KEY_POWER_ON()
117 #define KEY_POWER_OFF()
118 #define KEY_POWER_STATE() true
119
120
121 #else
122 # error "define code for matrix scan"
123 #endif
124
125
126 #if 0
127 // For ATMega328P with V-USB
128 //
129 // #elif defined(__AVR_ATmega328P__)
130 // Ports for V-USB
131 // key: PB0(pull-uped)
132 // prev: PB1
133 // row: PB2-4
134 // col: PC0-2,3
135 // power: PB5(Low:on/Hi-z:off)
136 #define KEY_INIT() do { \
137 DDRB |= 0x3E; \
138 DDRB &= ~(1<<0); \
139 PORTB |= 1<<0; \
140 DDRC |= 0x0F; \
141 KEY_UNABLE(); \
142 KEY_PREV_OFF(); \
143 } while (0)
144 #define KEY_SELECT(ROW, COL) do { \
145 PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \
146 PORTC = (PORTC & 0xF8) | ((COL) & 0x07); \
147 } while (0)
148 #define KEY_ENABLE() (PORTC &= ~(1<<3))
149 #define KEY_UNABLE() (PORTC |= (1<<3))
150 #define KEY_STATE() (PINB & (1<<0))
151 #define KEY_PREV_ON() (PORTB |= (1<<1))
152 #define KEY_PREV_OFF() (PORTB &= ~(1<<1))
153 // Power supply switching
154 #define KEY_POWER_ON() do { \
155 KEY_INIT(); \
156 PORTB &= ~(1<<5); \
157 _delay_ms(1); \
158 } while (0)
159 #define KEY_POWER_OFF() do { \
160 DDRB &= ~0x3F; \
161 PORTB &= ~0x3F; \
162 DDRC &= ~0x0F; \
163 PORTC &= ~0x0F; \
164 } while (0)
165 #endif
166
167 #endif
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