diff options
Diffstat (limited to 'keyboards/kitten_paw/matrix.c')
| -rw-r--r-- | keyboards/kitten_paw/matrix.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/keyboards/kitten_paw/matrix.c b/keyboards/kitten_paw/matrix.c new file mode 100644 index 0000000000..46875293fc --- /dev/null +++ b/keyboards/kitten_paw/matrix.c @@ -0,0 +1,164 @@ +/* + Copyright 2014 Ralf Schmitt <ralf@bunkertor.net> + + 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 uint8_t read_rows(void); +static void select_col(uint8_t col); + +inline uint8_t matrix_rows(void) { + return MATRIX_ROWS; +} + +inline uint8_t matrix_cols(void) { + return MATRIX_COLS; +} + +/* Column pin configuration + * + * col: 0 1 2 3 4 5 6 7 + * pin: PC7 PD5 PD3 PD1 PC2 PD6 PD4 PD2 + * + * Rrr pin configuration + * + * These rrrs uses one 74HC154 4 to 16 bit demultiplexer (low + * active), together with 2 rrrs driven directly from the micro + * controller, to control the 18 rrrs. The rrrs are driven from + * pins B6,5,4,3,2,1,0. + */ +void matrix_init(void) { + DDRC &= ~0b10000100; // Row input pins + DDRD &= ~0b01111110; + PORTC |= 0b10000100; + PORTD |= 0b01111110; + + DDRB |= 0b01111111; // Column output pins + + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; + matrix_debouncing[i] = 0; + } +} + +uint8_t matrix_scan(void) { + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + select_col(col); + _delay_us(3); + uint8_t rows = read_rows(); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col); + bool curr_bit = rows & (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]; + } + } + } + + return 1; +} + +bool matrix_is_modified(void) { + if (debouncing) + return false; + else + return true; +} + +inline bool matrix_is_on(uint8_t row, uint8_t col) { + return (matrix[row] & ((matrix_row_t)1<<col)); +} + +inline matrix_row_t matrix_get_row(uint8_t row) { + return matrix[row]; +} + +void matrix_print(void) { + print("\nr/c 0123456789ABCDEF\n"); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row))); + } +} + +uint8_t matrix_key_count(void) { + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += bitpop32(matrix[i]); + } + return count; +} + +static uint8_t read_rows(void) { + return + (PINC&(1<<7) ? 0 : (1<<0)) | + (PIND&(1<<5) ? 0 : (1<<1)) | + (PIND&(1<<3) ? 0 : (1<<2)) | + (PIND&(1<<1) ? 0 : (1<<3)) | + (PINC&(1<<2) ? 0 : (1<<4)) | + (PIND&(1<<2) ? 0 : (1<<5)) | + (PIND&(1<<4) ? 0 : (1<<6)) | + (PIND&(1<<6) ? 0 : (1<<7)); +} + +static void select_col(uint8_t col) { + switch (col) { + case 0: PORTB = (PORTB & ~0b01111111) | 0b01100100; break; + case 1: PORTB = (PORTB & ~0b01111111) | 0b01101100; break; + case 2: PORTB = (PORTB & ~0b01111111) | 0b01100010; break; + case 3: PORTB = (PORTB & ~0b01111111) | 0b01111010; break; + case 4: PORTB = (PORTB & ~0b01111111) | 0b01100110; break; + case 5: PORTB = (PORTB & ~0b01111111) | 0b01110110; break; + case 6: PORTB = (PORTB & ~0b01111111) | 0b01101110; break; + case 7: PORTB = (PORTB & ~0b01111111) | 0b01111110; break; + case 8: PORTB = (PORTB & ~0b01111111) | 0b01000001; break; + case 9: PORTB = (PORTB & ~0b01111111) | 0b00100001; break; + case 10: PORTB = (PORTB & ~0b01111111) | 0b01101010; break; + case 11: PORTB = (PORTB & ~0b01111111) | 0b01110010; break; + case 12: PORTB = (PORTB & ~0b01111111) | 0b01111100; break; + case 13: PORTB = (PORTB & ~0b01111111) | 0b01110100; break; + case 14: PORTB = (PORTB & ~0b01111111) | 0b01111000; break; + case 15: PORTB = (PORTB & ~0b01111111) | 0b01110000; break; + case 16: PORTB = (PORTB & ~0b01111111) | 0b01100000; break; + case 17: PORTB = (PORTB & ~0b01111111) | 0b01101000; break; + } +} |