matrix.c (7160B)
1 /* 2 Copyright 2019 MechMerlin <mechmerlin@gmail.com> 3 This program is free software: you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation, either version 2 of the License, or 6 (at your option) any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17 #include <util/delay.h> 18 #include <avr/io.h> 19 #include <stdio.h> 20 #include "matrix.h" 21 #include "util.h" 22 #include "print.h" 23 #include "debug.h" 24 25 #ifndef DEBOUNCE 26 # define DEBOUNCE 5 27 #endif 28 29 static uint8_t debouncing = DEBOUNCE; 30 31 /* matrix state(1:on, 0:off) */ 32 static matrix_row_t matrix[MATRIX_ROWS]; 33 static matrix_row_t matrix_debouncing[MATRIX_ROWS]; 34 35 static uint8_t read_rows(uint8_t col); 36 static void init_rows(void); 37 static void unselect_cols(void); 38 static void select_col(uint8_t col); 39 40 41 __attribute__ ((weak)) 42 void matrix_init_kb(void) { 43 matrix_init_user(); 44 } 45 46 __attribute__ ((weak)) 47 void matrix_scan_kb(void) { 48 matrix_scan_user(); 49 } 50 51 __attribute__ ((weak)) 52 void matrix_init_user(void) { 53 } 54 55 __attribute__ ((weak)) 56 void matrix_scan_user(void) { 57 } 58 59 void backlight_init_ports(void) 60 { 61 // DDRD |= 0b11010000; 62 // PORTD &= ~0b01010000; 63 // PORTD |= 0b10000000; 64 // DDRB |= 0b00011111; 65 // PORTB &= ~0b00001110; 66 // PORTB |= 0b00010001; 67 // DDRE |= 0b01000000; 68 // PORTE &= ~0b01000000; 69 } 70 71 void matrix_init(void) { 72 backlight_init_ports(); 73 unselect_cols(); 74 init_rows(); 75 76 for (uint8_t i=0; i < MATRIX_ROWS; i++) { 77 matrix[i] = 0; 78 matrix_debouncing[i] = 0; 79 } 80 81 matrix_init_kb(); 82 } 83 84 uint8_t matrix_scan(void) { 85 for (uint8_t col = 0; col < MATRIX_COLS; col++) { 86 select_col(col); 87 _delay_us(3); 88 89 uint8_t rows = read_rows(col); 90 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 = rows & (1<<row); 94 if (prev_bit != curr_bit) { 95 matrix_debouncing[row] ^= ((matrix_row_t)1<<col); 96 if (debouncing) { 97 dprint("bounce!: "); dprintf("%02X", debouncing); dprintln(); 98 } 99 debouncing = DEBOUNCE; 100 } 101 } 102 unselect_cols(); 103 } 104 105 if (debouncing) { 106 if (--debouncing) { 107 _delay_ms(1); 108 } else { 109 for (uint8_t i = 0; i < MATRIX_ROWS; i++) { 110 matrix[i] = matrix_debouncing[i]; 111 } 112 } 113 } 114 115 matrix_scan_kb(); 116 return 1; 117 } 118 119 inline matrix_row_t matrix_get_row(uint8_t row) { 120 return matrix[row]; 121 } 122 123 void matrix_print(void) { 124 print("\nr/c 0123456789ABCDEF\n"); 125 for (uint8_t row = 0; row < MATRIX_ROWS; row++) { 126 xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row))); 127 } 128 } 129 /* Row pin configuration 130 * row: 0 1 2 3 4 5 131 * pin: PB7 PD0 PD1 PD2 PD3 PD5 132 * 133 * Reset Key uses its own pin PE2 134 */ 135 static void init_rows(void) { 136 DDRD &= ~0b00101111; 137 PORTD &= ~0b00101111; 138 139 DDRB &= ~0b10000000; 140 PORTB &= ~0b10000000; 141 142 DDRE &= ~0b00000100; 143 PORTE |= 0b00000100; 144 } 145 146 static uint8_t read_rows(uint8_t col) { 147 if (col == 19) { 148 return PINE&(1<<2) ? 0 : (1<<0); 149 } else { 150 return (PIND&(1<<0) ? (1<<1) : 0) | 151 (PIND&(1<<1) ? (1<<2) : 0) | 152 (PIND&(1<<2) ? (1<<3) : 0) | 153 (PIND&(1<<3) ? (1<<4) : 0) | 154 (PIND&(1<<5) ? (1<<5) : 0) | 155 (PINB&(1<<7) ? (1<<0) : 0); 156 } 157 } 158 159 160 /* Columns 0 - G 161 * These columns uses two 74HC237D 3 to 8 bit demultiplexers. 162 * 163 * atmega32u4 decoder pin 164 * C6 U1 E2 165 * B6 U2 E2 166 * F0 U1, U2 A0 167 * F1 U1, U2 A1 168 * C7 U1, U2 A2 169 * 170 * col 0: B4 171 * col 1: D7 172 * col I: B5 173 * 174 * col / pin: PC6 PB6 PF0 PF1 PC7 Decoder Pin 175 * 2: 1 0 0 0 0 U1 Y0 176 * 3: 1 0 1 0 0 U1 Y1 177 * 4: 1 0 0 1 0 U1 Y2 178 * 5: 1 0 1 1 0 U1 Y3 179 * 6: 1 0 0 0 1 U1 Y4 180 * 7: 1 0 1 0 1 U1 Y5 181 * 8: 1 0 0 1 1 U1 Y6 182 * 9: 1 0 1 1 1 U1 Y7 183 * A: 0 1 0 0 0 U2 Y0 184 * B: 0 1 1 0 0 U2 Y1 185 * C: 0 1 0 1 0 U2 Y2 186 * D: 0 1 1 1 0 U2 Y3 187 * E: 0 1 0 0 1 U2 Y4 188 * F: 0 1 1 0 1 U2 Y5 189 * G: 0 1 0 1 1 U2 Y6 190 * H: 0 1 1 1 1 U2 Y7 191 * 192 */ 193 static void unselect_cols(void) { 194 DDRB |= 0b01110000; 195 PORTB &= ~0b01110000; 196 197 DDRC |= 0b11000000; 198 PORTC &= ~0b11000000; 199 200 DDRD |= 0b10000000; 201 PORTD &= ~0b10000000; 202 203 DDRF |= 0b00000011; 204 PORTF &= ~0b00000011; 205 } 206 207 static void select_col(uint8_t col) { 208 209 switch (col) { 210 case 0: 211 PORTB |= 0b00010000; 212 break; 213 case 1: 214 PORTD |= 0b10000000; 215 break; 216 case 2: // U1 Y0 217 PORTC |= 0b01000000; 218 break; 219 case 3: // U1 Y1 220 PORTC |= 0b01000000; 221 PORTF |= 0b00000001; 222 break; 223 case 4: // U1 Y2 224 PORTC |= 0b01000000; 225 PORTF |= 0b00000010; 226 break; 227 case 5: // U1 Y3 228 PORTC |= 0b01000000; 229 PORTF |= 0b00000011; 230 break; 231 case 6: // U1 Y4 232 PORTC |= 0b11000000; 233 break; 234 case 7: // U1 Y5 235 PORTC |= 0b11000000; 236 PORTF |= 0b00000001; 237 break; 238 case 8: // U1 Y6 239 PORTC |= 0b11000000; 240 PORTF |= 0b00000010; 241 break; 242 case 9: // U1 Y7 243 PORTC |= 0b11000000; 244 PORTF |= 0b00000011; 245 break; 246 case 10: // U2 Y0 247 PORTB |= 0b01000000; 248 break; 249 case 11: // U2 Y1 250 PORTB |= 0b01000000; 251 PORTF |= 0b00000001; 252 break; 253 case 12: // U2 Y2 254 PORTB |= 0b01000000; 255 PORTF |= 0b00000010; 256 break; 257 case 13: // U2 Y3 258 PORTB |= 0b01000000; 259 PORTF |= 0b00000011; 260 break; 261 case 14: // U2 Y4 262 PORTB |= 0b01000000; 263 PORTC |= 0b10000000; 264 break; 265 case 15: // U2 Y5 266 PORTB |= 0b01000000; 267 PORTC |= 0b10000000; 268 PORTF |= 0b00000001; 269 break; 270 case 16: // U2 Y6 271 PORTB |= 0b01000000; 272 PORTC |= 0b10000000; 273 PORTF |= 0b00000010; 274 break; 275 case 17: // U2 Y7 276 PORTB |= 0b01000000; 277 PORTC |= 0b10000000; 278 PORTF |= 0b00000011; 279 break; 280 case 18: 281 PORTB |= 0b00100000; 282 break; 283 } 284 }