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Diffstat (limited to 'keyboards/frosty_flake/matrix.c')
| -rw-r--r-- | keyboards/frosty_flake/matrix.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/keyboards/frosty_flake/matrix.c b/keyboards/frosty_flake/matrix.c new file mode 100644 index 0000000000..cde7f63b95 --- /dev/null +++ b/keyboards/frosty_flake/matrix.c @@ -0,0 +1,137 @@ +/* + Copyright 2017 Gabriel Young <gabeplaysdrums@live.com> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#endif +static uint8_t debouncing = DEBOUNCING_DELAY; + +static matrix_row_t matrix[MATRIX_ROWS]; +static matrix_row_t matrix_debouncing[MATRIX_ROWS]; + +static matrix_row_t scan_col(void) { + return ( + (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) | + (PINB&(1<<5) ? 0 : ((matrix_row_t)1<<1)) | + (PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) | + (PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) | + (PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) | + (PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) | + (PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) | + (PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7)) + ); +} + +static void select_col(uint8_t col) { + switch (col) { + case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break; + case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break; + case 2: PORTD = (PORTD & ~0b01111011) | 0b01101010; break; + case 3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break; + case 4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break; + case 5: PORTD = (PORTD & ~0b01111011) | 0b01110001; break; + case 6: PORTD = (PORTD & ~0b01111011) | 0b01100001; break; + case 7: PORTD = (PORTD & ~0b01111011) | 0b01110000; break; + case 8: PORTD = (PORTD & ~0b01111011) | 0b01100000; break; + case 9: PORTD = (PORTD & ~0b01111011) | 0b01101000; break; + case 10: PORTD = (PORTD & ~0b01111011) | 0b00101011; break; + case 11: PORTD = (PORTD & ~0b01111011) | 0b00110011; break; + case 12: PORTD = (PORTD & ~0b01111011) | 0b00100011; break; + case 13: PORTD = (PORTD & ~0b01111011) | 0b01111000; break; + case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break; + case 15: PORTD = (PORTD & ~0b01111011) | 0b01101001; break; + case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break; + case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break; + } +} + +void matrix_init(void) { + /* Row output pins */ + DDRD |= 0b01111011; + /* Column input pins */ + DDRC &= ~0b10000000; + DDRB &= ~0b01111111; + PORTC |= 0b10000000; + PORTB |= 0b01111111; + + for (uint8_t i=0; i < MATRIX_ROWS; i++) + matrix[i] = matrix_debouncing[i] = 0; + + matrix_init_quantum(); +} + +uint8_t matrix_scan(void) { + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + select_col(col); + _delay_us(3); + matrix_row_t col_scan = scan_col(); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col); + bool curr_bit = col_scan & (1<<row); + if (prev_bit != curr_bit) { + matrix_debouncing[row] ^= ((matrix_row_t)1<<col); + debouncing = DEBOUNCING_DELAY; + } + } + } + + if (debouncing) { + if (--debouncing) + _delay_ms(1); + else + for (uint8_t i = 0; i < MATRIX_ROWS; i++) + matrix[i] = matrix_debouncing[i]; + } + + matrix_scan_quantum(); + return 1; +} + +inline matrix_row_t matrix_get_row(uint8_t row) { + return matrix[row]; +} + +void matrix_print(void) { +#ifndef NO_PRINT + print("\nr\\c ABCDEFGHIJKLMNOPQR\n"); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + matrix_row_t matrix_row = matrix_get_row(row); + xprintf("%02X: ", row); + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + bool curr_bit = matrix_row & (1<<col); + xprintf("%c", curr_bit ? '*' : '.'); + } + print("\n"); + } +#endif +} + +uint8_t matrix_key_count(void) { + uint8_t count = 0; + for (uint8_t row = 0; row < MATRIX_ROWS; row++) + count += bitpop32(matrix[row]); + return count; +} |