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tmk_keyboard_custom/keyboard/staryu/matrix.c
2015-04-21 17:22:40 +09:00

137 lines
2.7 KiB
C

/*
Copyright 2015 Kai Ryu <kai1103@gmail.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/>.
*/
/*
* scan matrix
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "timer.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "keymap_common.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
static uint8_t debouncing = DEBOUNCE;
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix = 0;
static matrix_row_t matrix_debouncing = 0;
static matrix_row_t read_cols(void);
static void init_cols(void);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
// initialize cols
init_cols();
}
uint8_t matrix_scan(void)
{
matrix_row_t cols = read_cols();
if (matrix_debouncing != cols) {
matrix_debouncing = cols;
if (debouncing) {
debug("bounce!: "); debug_hex(debouncing); debug("\n");
}
debouncing = DEBOUNCE;
}
if (debouncing) {
if (--debouncing) {
_delay_ms(1);
} else {
matrix = matrix_debouncing;
}
}
return 1;
}
bool matrix_is_modified(void)
{
if (debouncing) return false;
return true;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix & ((matrix_row_t)1<<col));
}
inline
matrix_row_t matrix_get_row(uint8_t row)
{
return matrix;
}
void matrix_print(void)
{
print("\nr/c 0123456789ABCDEF\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
phex(row); print(": ");
pbin_reverse16(matrix_get_row(row));
print("\n");
}
}
uint8_t matrix_key_count(void)
{
return bitpop16(matrix);
}
/* Column pin configuration
* col: 0 1 2 3 4
* pin: D0 D1 D2 D3 D4
*/
static void init_cols(void)
{
// Input with pull-up(DDR:0, PORT:1)
DDRD &= ~(1<<PD0 | 1<<PD1 | 1<<PD2 | 1<<PD3 | 1<<PD4);
PORTD |= (1<<PD0 | 1<<PD1 | 1<<PD2 | 1<<PD3 | 1<<PD4);
}
/* Column pin configuration
* col: 0 1 2 3 4
* pin: D0 D1 D2 D3 D4
*/
static matrix_row_t read_cols(void)
{
return (~PIND) & 0b00011111;
}