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1 | /* | |
2 | Copyright 2017 Jun Wako <wakojun@gmail.com> | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation, either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * scan matrix | |
20 | */ | |
21 | #include <stdint.h> | |
22 | #include <stdbool.h> | |
23 | #include <util/delay.h> | |
24 | #include "print.h" | |
25 | #include "debug.h" | |
26 | #include "util.h" | |
27 | #include "timer.h" | |
28 | #include "matrix.h" | |
29 | #include "led.h" | |
30 | #include "fc660c.h" | |
31 | ||
32 | ||
33 | static uint32_t matrix_last_modified = 0; | |
34 | ||
35 | // matrix state buffer(1:on, 0:off) | |
36 | static matrix_row_t *matrix; | |
37 | static matrix_row_t *matrix_prev; | |
38 | static matrix_row_t _matrix0[MATRIX_ROWS]; | |
39 | static matrix_row_t _matrix1[MATRIX_ROWS]; | |
40 | ||
41 | ||
42 | void matrix_init(void) | |
43 | { | |
44 | #if 0 | |
45 | debug_enable = true; | |
46 | debug_keyboard = true; | |
47 | debug_matrix = true; | |
48 | #endif | |
49 | ||
50 | KEY_INIT(); | |
51 | ||
52 | // LEDs on CapsLock and Insert | |
53 | DDRB |= (1<<5) | (1<<6); | |
54 | PORTB |= (1<<5) | (1<<6); | |
55 | ||
56 | // initialize matrix state: all keys off | |
57 | for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00; | |
58 | for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00; | |
59 | matrix = _matrix0; | |
60 | matrix_prev = _matrix1; | |
61 | } | |
62 | ||
63 | uint8_t matrix_scan(void) | |
64 | { | |
65 | matrix_row_t *tmp; | |
66 | ||
67 | tmp = matrix_prev; | |
68 | matrix_prev = matrix; | |
69 | matrix = tmp; | |
70 | ||
71 | uint8_t row, col; | |
72 | for (col = 0; col < MATRIX_COLS; col++) { | |
73 | SET_COL(col); | |
74 | for (row = 0; row < MATRIX_ROWS; row++) { | |
75 | //KEY_SELECT(row, col); | |
76 | SET_ROW(row); | |
77 | _delay_us(2); | |
78 | ||
79 | // Not sure this is needed. This just emulates HHKB controller's behaviour. | |
80 | if (matrix_prev[row] & (1<<col)) { | |
81 | KEY_HYS_ON(); | |
82 | } | |
83 | _delay_us(10); | |
84 | ||
85 | // NOTE: KEY_STATE is valid only in 20us after KEY_ENABLE. | |
86 | // If V-USB interrupts in this section we could lose 40us or so | |
87 | // and would read invalid value from KEY_STATE. | |
88 | uint8_t last = TIMER_RAW; | |
89 | ||
90 | KEY_ENABLE(); | |
91 | ||
92 | // Wait for KEY_STATE outputs its value. | |
93 | _delay_us(2); | |
94 | ||
95 | if (KEY_STATE()) { | |
96 | matrix[row] &= ~(1<<col); | |
97 | } else { | |
98 | matrix[row] |= (1<<col); | |
99 | } | |
100 | ||
101 | // Ignore if this code region execution time elapses more than 20us. | |
102 | // MEMO: 20[us] * (TIMER_RAW_FREQ / 1000000)[count per us] | |
103 | // MEMO: then change above using this rule: a/(b/c) = a*1/(b/c) = a*(c/b) | |
104 | if (TIMER_DIFF_RAW(TIMER_RAW, last) > 20/(1000000/TIMER_RAW_FREQ)) { | |
105 | matrix[row] = matrix_prev[row]; | |
106 | } | |
107 | ||
108 | _delay_us(5); | |
109 | KEY_HYS_OFF(); | |
110 | KEY_UNABLE(); | |
111 | ||
112 | // NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE. | |
113 | // This takes 25us or more to make sure KEY_STATE returns to idle state. | |
114 | _delay_us(75); | |
115 | } | |
116 | if (matrix[row] ^ matrix_prev[row]) { | |
117 | matrix_last_modified = timer_read32(); | |
118 | } | |
119 | } | |
120 | return 1; | |
121 | } | |
122 | ||
123 | inline | |
124 | matrix_row_t matrix_get_row(uint8_t row) | |
125 | { | |
126 | return matrix[row]; | |
127 | } | |
128 | ||
129 | void led_set(uint8_t usb_led) | |
130 | { | |
131 | if (usb_led & (1<<USB_LED_CAPS_LOCK)) { | |
132 | PORTB &= ~(1<<6); | |
133 | } else { | |
134 | PORTB |= (1<<6); | |
135 | } | |
136 | } | |
137 | ||
138 | ||
139 | #ifdef UNIMAP_ENABLE | |
140 | #include <avr/pgmspace.h> | |
141 | #include "unimap.h" | |
142 | ||
143 | const uint8_t PROGMEM unimap_trans[MATRIX_ROWS][MATRIX_COLS] = { | |
144 | { UNIMAP_Q, UNIMAP_W, UNIMAP_E, UNIMAP_TAB, UNIMAP_R, UNIMAP_U, UNIMAP_T, UNIMAP_Y, | |
145 | UNIMAP_O, UNIMAP_P, UNIMAP_LBRC, UNIMAP_I, UNIMAP_RBRC, UNIMAP_NO, UNIMAP_BSLS, UNIMAP_DEL }, | |
146 | { UNIMAP_1, UNIMAP_2, UNIMAP_3, UNIMAP_GRV, UNIMAP_4, UNIMAP_7, UNIMAP_5, UNIMAP_6, | |
147 | UNIMAP_9, UNIMAP_0, UNIMAP_MINS, UNIMAP_8, UNIMAP_EQL, UNIMAP_NO, UNIMAP_BSPC, UNIMAP_INS }, | |
148 | { UNIMAP_NO, UNIMAP_LGUI, UNIMAP_LALT, UNIMAP_LCTL, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_SPC, | |
149 | UNIMAP_RALT, UNIMAP_NO, UNIMAP_RCTL, UNIMAP_NO, UNIMAP_RGUI, UNIMAP_DOWN, UNIMAP_LEFT, UNIMAP_RGHT }, | |
150 | { UNIMAP_NO, UNIMAP_Z, UNIMAP_X, UNIMAP_LSFT, UNIMAP_C, UNIMAP_N, UNIMAP_V, UNIMAP_B, | |
151 | UNIMAP_COMM, UNIMAP_DOT, UNIMAP_SLSH, UNIMAP_M, UNIMAP_RSFT, UNIMAP_UP, UNIMAP_NO, UNIMAP_NO }, | |
152 | { UNIMAP_A, UNIMAP_S, UNIMAP_D, UNIMAP_CAPS, UNIMAP_F, UNIMAP_J, UNIMAP_G, UNIMAP_H, | |
153 | UNIMAP_L, UNIMAP_SCLN, UNIMAP_QUOT, UNIMAP_K, UNIMAP_NO, UNIMAP_NO, UNIMAP_ENT, UNIMAP_NO }, | |
154 | { UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, | |
155 | UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO }, | |
156 | { UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, | |
157 | UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO }, | |
158 | { UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, | |
159 | UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO, UNIMAP_NO } | |
160 | }; | |
161 | #endif |