2 Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
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>
30 static uint8_t debouncing = DEBOUNCE;
32 static matrix_row_t matrix[MATRIX_ROWS];
33 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
35 static uint8_t read_rows(void);
36 static void select_col(uint8_t col);
38 __attribute__ ((weak))
39 void matrix_init_kb(void) {
43 __attribute__ ((weak))
44 void matrix_scan_kb(void) {
48 __attribute__ ((weak))
49 void matrix_init_user(void) {
52 __attribute__ ((weak))
53 void matrix_scan_user(void) {
56 inline uint8_t matrix_rows(void) {
60 inline uint8_t matrix_cols(void) {
64 /* Column pin configuration
66 * col: 0 1 2 3 4 5 6 7
67 * pin: PC7 PD5 PD3 PD1 PC2 PD6 PD4 PD2
69 * Rrr pin configuration
71 * These rrrs uses one 74HC154 4 to 16 bit demultiplexer (low
72 * active), together with 2 rrrs driven directly from the micro
73 * controller, to control the 18 rrrs. The rrrs are driven from
74 * pins B6,5,4,3,2,1,0.
76 void matrix_init(void) {
77 DDRC &= ~0b10000100; // Row input pins
82 DDRB |= 0b01111111; // Column output pins
84 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
86 matrix_debouncing[i] = 0;
88 matrix_init_quantum();
91 uint8_t matrix_scan(void) {
92 for (uint8_t col = 0; col < MATRIX_COLS; col++) {
95 uint8_t rows = read_rows();
96 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
97 bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
98 bool curr_bit = rows & (1<<row);
99 if (prev_bit != curr_bit) {
100 matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
101 debouncing = DEBOUNCE;
111 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
112 matrix[i] = matrix_debouncing[i];
116 matrix_scan_quantum();
120 bool matrix_is_modified(void) {
127 inline bool matrix_is_on(uint8_t row, uint8_t col) {
128 return (matrix[row] & ((matrix_row_t)1<<col));
131 inline matrix_row_t matrix_get_row(uint8_t row) {
135 void matrix_print(void) {
136 print("\nr/c 0123456789ABCDEF\n");
137 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
138 xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
142 uint8_t matrix_key_count(void) {
144 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
145 count += bitpop32(matrix[i]);
150 static uint8_t read_rows(void) {
152 (PINC&(1<<7) ? 0 : (1<<0)) |
153 (PIND&(1<<5) ? 0 : (1<<1)) |
154 (PIND&(1<<3) ? 0 : (1<<2)) |
155 (PIND&(1<<1) ? 0 : (1<<3)) |
156 (PINC&(1<<2) ? 0 : (1<<4)) |
157 (PIND&(1<<2) ? 0 : (1<<5)) |
158 (PIND&(1<<4) ? 0 : (1<<6)) |
159 (PIND&(1<<6) ? 0 : (1<<7));
162 static void select_col(uint8_t col) {
164 case 0: PORTB = (PORTB & ~0b01111111) | 0b01100100; break;
165 case 1: PORTB = (PORTB & ~0b01111111) | 0b01101100; break;
166 case 2: PORTB = (PORTB & ~0b01111111) | 0b01100010; break;
167 case 3: PORTB = (PORTB & ~0b01111111) | 0b01111010; break;
168 case 4: PORTB = (PORTB & ~0b01111111) | 0b01100110; break;
169 case 5: PORTB = (PORTB & ~0b01111111) | 0b01110110; break;
170 case 6: PORTB = (PORTB & ~0b01111111) | 0b01101110; break;
171 case 7: PORTB = (PORTB & ~0b01111111) | 0b01111110; break;
172 case 8: PORTB = (PORTB & ~0b01111111) | 0b01000001; break;
173 case 9: PORTB = (PORTB & ~0b01111111) | 0b00100001; break;
174 case 10: PORTB = (PORTB & ~0b01111111) | 0b01101010; break;
175 case 11: PORTB = (PORTB & ~0b01111111) | 0b01110010; break;
176 case 12: PORTB = (PORTB & ~0b01111111) | 0b01111100; break;
177 case 13: PORTB = (PORTB & ~0b01111111) | 0b01110100; break;
178 case 14: PORTB = (PORTB & ~0b01111111) | 0b01111000; break;
179 case 15: PORTB = (PORTB & ~0b01111111) | 0b01110000; break;
180 case 16: PORTB = (PORTB & ~0b01111111) | 0b01100000; break;
181 case 17: PORTB = (PORTB & ~0b01111111) | 0b01101000; break;