diff options
Diffstat (limited to 'keyboards/frosty_flake/matrix.c')
| -rw-r--r-- | keyboards/frosty_flake/matrix.c | 135 | 
1 files changed, 135 insertions, 0 deletions
| diff --git a/keyboards/frosty_flake/matrix.c b/keyboards/frosty_flake/matrix.c new file mode 100644 index 0000000000..05dffdb643 --- /dev/null +++ b/keyboards/frosty_flake/matrix.c @@ -0,0 +1,135 @@ +/* +  Copyright 2017 Gabriel Young <[email protected]> + +  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) { +    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"); +    } +} + +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; +}
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