diff options
Diffstat (limited to 'keyboards/bpiphany/frosty_flake/20130602/matrix.c')
| -rw-r--r-- | keyboards/bpiphany/frosty_flake/20130602/matrix.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/keyboards/bpiphany/frosty_flake/20130602/matrix.c b/keyboards/bpiphany/frosty_flake/20130602/matrix.c new file mode 100644 index 0000000000..e0337f9ec2 --- /dev/null +++ b/keyboards/bpiphany/frosty_flake/20130602/matrix.c @@ -0,0 +1,86 @@ +/* + 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 <util/delay.h> +#include "matrix.h" + + +static matrix_row_t scan_col(void) { + // Each of the 8 columns is read off pins as below + // 7 6 5 4 3 2 1 0 + // ,--,--,--,--,--,--,--,--, + // |B0|B3|B2|B1|B6|B4|B5|C7| + // `--`--`--`--`--`--`--`--` + return ( + (PINC&(1<<2) ? 0 : ((matrix_row_t)1<<0)) | + (PIND&(1<<0) ? 0 : ((matrix_row_t)1<<1)) | + (PIND&(1<<1) ? 0 : ((matrix_row_t)1<<2)) | + (PINC&(1<<7) ? 0 : ((matrix_row_t)1<<3)) | + (PIND&(1<<5) ? 0 : ((matrix_row_t)1<<4)) | + (PIND&(1<<4) ? 0 : ((matrix_row_t)1<<5)) | + (PIND&(1<<2) ? 0 : ((matrix_row_t)1<<6)) | + (PIND&(1<<6) ? 0 : ((matrix_row_t)1<<7)) + ); +} + +static void select_row(uint8_t row) { + switch (row) { + case 0: PORTB = (PORTB & ~0b01111110) | 0b00111010; break; + case 1: PORTB = (PORTB & ~0b01111110) | 0b01011000; break; + case 2: PORTB = (PORTB & ~0b01111110) | 0b01110000; break; + case 3: PORTB = (PORTB & ~0b01111110) | 0b01101110; break; + case 4: PORTB = (PORTB & ~0b01111110) | 0b01101100; break; + case 5: PORTB = (PORTB & ~0b01111110) | 0b01101010; break; + case 6: PORTB = (PORTB & ~0b01111110) | 0b01101000; break; + case 7: PORTB = (PORTB & ~0b01111110) | 0b01100100; break; + case 8: PORTB = (PORTB & ~0b01111110) | 0b01100000; break; + case 9: PORTB = (PORTB & ~0b01111110) | 0b01100010; break; + case 10: PORTB = (PORTB & ~0b01111110) | 0b00011010; break; + case 11: PORTB = (PORTB & ~0b01111110) | 0b00011000; break; + case 12: PORTB = (PORTB & ~0b01111110) | 0b00111100; break; + case 13: PORTB = (PORTB & ~0b01111110) | 0b01100110; break; + case 14: PORTB = (PORTB & ~0b01111110) | 0b00111000; break; + case 15: PORTB = (PORTB & ~0b01111110) | 0b01110010; break; + case 16: PORTB = (PORTB & ~0b01111110) | 0b00011110; break; + case 17: PORTB = (PORTB & ~0b01111110) | 0b00111110; break; + } +} + +void matrix_init_custom(void) { + /* Column output pins */ + DDRB |= 0b01111110; + /* Row input pins */ + DDRC &= ~0b10000100; + DDRD &= ~0b01110111; + PORTC |= 0b10000100; + PORTD |= 0b01110111; +} + +// matrix is 18 uint8_t. +// we select the row (one of 18), then read the column +bool matrix_scan_custom(matrix_row_t current_matrix[]) { + bool has_changed = false; + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + matrix_row_t orig = current_matrix[row]; + select_row(row); + _delay_us(3); + current_matrix[row] = scan_col(); + has_changed |= (orig != current_matrix[row]); + } + + return has_changed; +} |