258 lines
5.7 KiB
C
258 lines
5.7 KiB
C
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#include <avr/io.h>
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#include <util/delay.h>
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#define MATRIX_X(t) t##B
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#define MATRIX_Y1(t) t##C
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#define MATRIX_Y2(t) t##D
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#define MATRIX_Y_SPLIT 6
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#define MATRIX_Y2_DELTA (-1)
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#define MASK_Y1 0b00111111
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#define MASK_Y2 0b11100000
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#define DELAY_ROW_SWITCH() _delay_ms(1) //_delay_us(1)
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#define BAUDRATE 9600
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#define UBRR 51 // (F_CPU / BAUDRATE) / 32
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/* Keycode from include/linux/input.h */
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#define KEY_RESERVED 0
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#define KEY_ESC 1
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#define KEY_1 2
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#define KEY_2 3
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#define KEY_3 4
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#define KEY_4 5
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#define KEY_5 6
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#define KEY_6 7
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#define KEY_7 8
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#define KEY_8 9
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#define KEY_9 10
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#define KEY_0 11
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#define KEY_MINUS 12
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#define KEY_EQUAL 13
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#define KEY_BACKSPACE 14
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#define KEY_TAB 15
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#define KEY_Q 16
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#define KEY_W 17
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#define KEY_E 18
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#define KEY_R 19
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#define KEY_T 20
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#define KEY_Y 21
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#define KEY_U 22
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#define KEY_I 23
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#define KEY_O 24
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#define KEY_P 25
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#define KEY_LEFTBRACE 26
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#define KEY_RIGHTBRACE 27
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#define KEY_ENTER 28
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#define KEY_LEFTCTRL 29
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#define KEY_A 30
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#define KEY_S 31
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#define KEY_D 32
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#define KEY_F 33
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#define KEY_G 34
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#define KEY_H 35
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#define KEY_J 36
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#define KEY_K 37
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#define KEY_L 38
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#define KEY_SEMICOLON 39
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#define KEY_APOSTROPHE 40
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#define KEY_GRAVE 41
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#define KEY_LEFTSHIFT 42
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#define KEY_BACKSLASH 43
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#define KEY_Z 44
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#define KEY_X 45
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#define KEY_C 46
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#define KEY_V 47
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#define KEY_B 48
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#define KEY_N 49
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#define KEY_M 50
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#define KEY_COMMA 51
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#define KEY_DOT 52
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#define KEY_SLASH 53
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#define KEY_RIGHTSHIFT 54
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#define KEY_KPASTERISK 55
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#define KEY_LEFTALT 56
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#define KEY_SPACE 57
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#define KEY_CAPSLOCK 58
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#define KEY_F1 59
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#define KEY_F2 60
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#define KEY_F3 61
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#define KEY_F4 62
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#define KEY_F5 63
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#define KEY_F6 64
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#define KEY_F7 65
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#define KEY_F8 66
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#define KEY_F9 67
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#define KEY_F10 68
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#define KEY_NUMLOCK 69
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#define KEY_SCROLLLOCK 70
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#define KEY_KP7 71
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#define KEY_KP8 72
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#define KEY_KP9 73
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#define KEY_KPMINUS 74
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#define KEY_KP4 75
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#define KEY_KP5 76
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#define KEY_KP6 77
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#define KEY_KPPLUS 78
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#define KEY_KP1 79
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#define KEY_KP2 80
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#define KEY_KP3 81
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#define KEY_KP0 82
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#define KEY_KPDOT 83
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#define KEY_ZENKAKUHANKAKU 85
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#define KEY_102ND 86
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#define KEY_F11 87
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#define KEY_F12 88
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#define KEY_RO 89
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#define KEY_KATAKANA 90
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#define KEY_HIRAGANA 91
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#define KEY_HENKAN 92
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#define KEY_KATAKANAHIRAGANA 93
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#define KEY_MUHENKAN 94
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#define KEY_KPJPCOMMA 95
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#define KEY_KPENTER 96
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#define KEY_RIGHTCTRL 97
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#define KEY_KPSLASH 98
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#define KEY_SYSRQ 99
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#define KEY_RIGHTALT 100
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#define KEY_LINEFEED 101
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#define KEY_HOME 102
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#define KEY_UP 103
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#define KEY_PAGEUP 104
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#define KEY_LEFT 105
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#define KEY_RIGHT 106
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#define KEY_END 107
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#define KEY_DOWN 108
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#define KEY_PAGEDOWN 109
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#define KEY_INSERT 110
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#define KEY_DELETE 111
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#define KEY_MACRO 112
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#define KEY_MUTE 113
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#define KEY_VOLUMEDOWN 114
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#define KEY_VOLUMEUP 115
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#define KEY_POWER 116 /* SC System Power Down */
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#define KEY_KPEQUAL 117
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#define KEY_KPPLUSMINUS 118
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#define KEY_PAUSE 119
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#define KEY_SCALE 120 /* AL Compiz Scale (Expose) */
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#define KEY_KPCOMMA 121
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#define KEY_HANGEUL 122
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#define KEY_HANGUEL KEY_HANGEUL
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#define KEY_HANJA 123
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#define KEY_YEN 124
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#define KEY_LEFTMETA 125
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#define KEY_RIGHTMETA 126
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#define KEY_COMPOSE 127
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#define SKEY_FN 255
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#define KEYCODE_FN 127
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static uint8_t keycode_translation_matrix[2][9][8] = {
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{ /* Standard keymap */
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{KEY_4, KEY_3, 3, 4, 5, 6, 7, 8},
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{KEY_5, KEY_6, 13, 14, 15, 16, 17, 18},
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{KEY_8, KEY_7, 23, 24, 25, 26, 27, 28},
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{KEY_1, KEY_2, 33, 34, 35, 36, 37, 38},
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{KEY_9, 42, 43, 44, 45, 46, 47, 48},
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{51, KEY_0, 53, 54, 55, 56, 57, 58},
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{61, 62, 63, 64, 65, 66, 67, 68},
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{71, 72, 73, 74, 75, SKEY_FN, 77, 78},
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{81, 82, 83, 84, 85, 86, 87, 88}
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},
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{ /* FN keymap */
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{ 1, 2, 3, 4, 5, 6, 7, 8},
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{11, 12, 13, 14, 15, 16, 17, 18},
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{21, 22, 23, 24, 25, 26, 27, 28},
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{31, 32, 33, 34, 35, 36, 37, 38},
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{41, 42, 43, 44, 45, 46, 47, 48},
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{51, 52, 53, 54, 55, 56, 57, 58},
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{61, 62, 63, 64, 65, 66, 67, 68},
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{71, 72, 73, 74, 75, SKEY_FN, 77, 78},
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{81, 82, 83, 84, 85, 86, 87, 88}
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}
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};
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uint8_t matrix_state_last_vector[9] = {0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF,
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0xFF};
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uint8_t fn_active = 0;
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void process_key_event(uint8_t col, uint8_t row, uint8_t state)
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{
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char c;
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uint8_t keycode;
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keycode = keycode_translation_matrix[fn_active][col][row];
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if (keycode == SKEY_FN) {
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fn_active = state;
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#ifdef KEYCODE_FN
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while (!(UCSRA & (1 << UDRE)));
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UDR = KEYCODE_FN | (state << 7);
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#endif
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} else {
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c = keycode | (state << 7);
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while (!(UCSRA & (1 << UDRE)));
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UDR = c;
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}
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}
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void matrix_scan_col(uint8_t col)
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{
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uint8_t matrix_state;
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uint8_t row;
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uint8_t bit;
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if (col < MATRIX_Y_SPLIT) {
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MATRIX_Y2(DDR) &= ~(MASK_Y2);
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MATRIX_Y1(DDR) = (MATRIX_Y1(DDR) & ~(MASK_Y1)) |
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(1 << col);
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} else {
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MATRIX_Y2(DDR) = (MATRIX_Y2(DDR) & ~(MASK_Y2)) |
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(1 << (col + MATRIX_Y2_DELTA));
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MATRIX_Y1(DDR) &= ~(MASK_Y1);
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}
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DELAY_ROW_SWITCH();
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matrix_state = MATRIX_X(PIN);
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for (row = 0; row < 8; ++row) {
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bit = (1 << row);
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if ((matrix_state ^ matrix_state_last_vector[col]) & bit) {
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process_key_event(col, row, !(matrix_state & bit));
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}
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}
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matrix_state_last_vector[col] = matrix_state;
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}
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int main()
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{
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int col;
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/* Config I/O */
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MATRIX_X(DDR) = 0; /* Columns as input */
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MATRIX_X(PORT) = 0xFF; /* Enable pull-ups for columns */
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MATRIX_Y1(DDR) &= ~MASK_Y1; /* Disable rows */
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MATRIX_Y2(DDR) &= ~MASK_Y2; /* Disable rows */
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MATRIX_Y1(PORT) &= ~MASK_Y1; /* Pull row low when selected */
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MATRIX_Y2(PORT) &= ~MASK_Y2; /* Pull row low when selected */
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UCSRB = (1 << TXEN);
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UBRRH = (UBRR >> 8) & 0xFF;
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UBRRL = UBRR & 0xFF;
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fn_active = 0;
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/* Continuously scan matrix */
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while (1) {
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for (col = 0; col < 9; ++col) {
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matrix_scan_col(col);
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}
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}
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}
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