137 lines
2.7 KiB
C
137 lines
2.7 KiB
C
/*
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Copyright 2015 Kai Ryu <kai1103@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "timer.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "keymap_common.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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static uint8_t debouncing = DEBOUNCE;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix = 0;
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static matrix_row_t matrix_debouncing = 0;
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static matrix_row_t read_cols(void);
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static void init_cols(void);
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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// initialize cols
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init_cols();
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}
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uint8_t matrix_scan(void)
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{
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matrix_row_t cols = read_cols();
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if (matrix_debouncing != cols) {
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matrix_debouncing = cols;
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); debug("\n");
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}
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debouncing = DEBOUNCE;
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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matrix = matrix_debouncing;
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}
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}
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return 1;
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}
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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return true;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix & ((matrix_row_t)1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix;
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}
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void matrix_print(void)
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{
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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return bitpop16(matrix);
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}
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/* Column pin configuration
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* col: 0 1 2 3 4
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* pin: D0 D1 D2 D3 D4
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*/
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static void init_cols(void)
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{
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// Input with pull-up(DDR:0, PORT:1)
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DDRD &= ~(1<<PD0 | 1<<PD1 | 1<<PD2 | 1<<PD3 | 1<<PD4);
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PORTD |= (1<<PD0 | 1<<PD1 | 1<<PD2 | 1<<PD3 | 1<<PD4);
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}
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/* Column pin configuration
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* col: 0 1 2 3 4
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* pin: D0 D1 D2 D3 D4
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*/
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static matrix_row_t read_cols(void)
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{
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return (~PIND) & 0b00011111;
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}
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