2 Copyright 2017 Gabriel Young <gabeplaysdrums@live.com>
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.
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.
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/>.
21 #include <util/delay.h>
27 #ifndef DEBOUNCING_DELAY
28 # define DEBOUNCING_DELAY 5
30 static uint8_t debouncing = DEBOUNCING_DELAY;
32 static matrix_row_t matrix[MATRIX_ROWS];
33 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
35 static matrix_row_t scan_col(void) {
37 (PINC&(1<<2) ? 0 : ((matrix_row_t)1<<0)) | \
38 (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<1)) | \
39 (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) | \
40 (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<3)) | \
41 (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) | \
42 (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<5)) | \
43 (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<6)) | \
44 (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<7))
48 static void select_col(uint8_t col) {
50 case 0: PORTD = (PORTD & ~0b01110111) | 0b01110110; break; \
51 case 1: PORTD = (PORTD & ~0b01110111) | 0b01100001; break; \
52 case 2: PORTD = (PORTD & ~0b01110111) | 0b01100101; break; \
53 case 3: PORTD = (PORTD & ~0b01110111) | 0b00000011; break; \
54 case 4: PORTD = (PORTD & ~0b01110111) | 0b00000111; break; \
55 case 5: PORTD = (PORTD & ~0b01110111) | 0b00010011; break; \
56 case 6: PORTD = (PORTD & ~0b01110111) | 0b00010111; break; \
57 case 7: PORTD = (PORTD & ~0b01110111) | 0b00100011; break; \
58 case 8: PORTD = (PORTD & ~0b01110111) | 0b00100111; break; \
59 case 9: PORTD = (PORTD & ~0b01110111) | 0b00110011; break; \
60 case 10: PORTD = (PORTD & ~0b01110111) | 0b01110010; break; \
61 case 11: PORTD = (PORTD & ~0b01110111) | 0b01100110; break; \
62 case 12: PORTD = (PORTD & ~0b01110111) | 0b01110000; break; \
63 case 13: PORTD = (PORTD & ~0b01110111) | 0b01100100; break; \
64 case 14: PORTD = (PORTD & ~0b01110111) | 0b01100000; break; \
65 case 15: PORTD = (PORTD & ~0b01110111) | 0b01000111; break; \
66 case 16: PORTD = (PORTD & ~0b01110111) | 0b01000011; break; \
67 case 17: PORTD = (PORTD & ~0b01110111) | 0b00110111; break;
71 void matrix_init(void) {
72 /* Column output pins */ \
74 /* Row input pins */ \
75 DDRC &= ~0b10000100; \
76 DDRB &= ~0b01111110; \
77 PORTC |= 0b10000100; \
80 for (uint8_t i=0; i < MATRIX_ROWS; i++)
81 matrix[i] = matrix_debouncing[i] = 0;
83 matrix_init_quantum();
86 uint8_t matrix_scan(void) {
87 for (uint8_t col = 0; col < MATRIX_COLS; col++) {
90 matrix_row_t col_scan = scan_col();
91 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
92 bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
93 bool curr_bit = col_scan & (1<<row);
94 if (prev_bit != curr_bit) {
95 matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
96 debouncing = DEBOUNCING_DELAY;
105 for (uint8_t i = 0; i < MATRIX_ROWS; i++)
106 matrix[i] = matrix_debouncing[i];
109 matrix_scan_quantum();
113 inline matrix_row_t matrix_get_row(uint8_t row) {
117 void matrix_print(void) {
119 print("\nr\\c ABCDEFGHIJKLMNOPQR\n");
120 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
121 matrix_row_t matrix_row = matrix_get_row(row);
122 xprintf("%02X: ", row);
123 for (uint8_t col = 0; col < MATRIX_COLS; col++) {
124 bool curr_bit = matrix_row & (1<<col);
125 xprintf("%c", curr_bit ? '*' : '.');
132 uint8_t matrix_key_count(void) {
134 for (uint8_t row = 0; row < MATRIX_ROWS; row++)
135 count += bitpop32(matrix[row]);