101 строка
2.1 KiB
C
101 строка
2.1 KiB
C
/*
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Copyright 2011,2012 Jun Wako <wakojun@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 "print.h"
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#include "util.h"
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#include "debug.h"
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#include "host.h"
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#include "led.h"
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#include "m0110.h"
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#include "matrix.h"
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#define CAPS 0x39
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#define CAPS_BREAK (CAPS | 0x80)
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#define ROW(key) ((key)>>3&0x0F)
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#define COL(key) ((key)&0x07)
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static bool is_modified = false;
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// matrix state buffer(1:on, 0:off)
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static uint8_t *matrix;
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static uint8_t _matrix0[MATRIX_ROWS];
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static void register_key(uint8_t key);
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void matrix_init(void)
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{
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m0110_init();
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
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matrix = _matrix0;
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// LED flash
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DDRD |= (1<<6); PORTD |= (1<<6);
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_delay_ms(500);
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DDRD |= (1<<6); PORTD &= ~(1<<6);
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return;
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}
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uint8_t matrix_scan(void)
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{
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uint8_t key;
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is_modified = false;
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key = m0110_recv_key();
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if (key == M0110_NULL) {
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return 0;
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} else if (key == M0110_ERROR) {
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return 0;
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} else {
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is_modified = true;
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register_key(key);
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}
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if (debug_enable) {
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print("["); phex(key); print("]\n");
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}
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return 1;
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}
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inline
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uint8_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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inline
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static void register_key(uint8_t key)
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{
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if (key&0x80) {
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matrix[ROW(key)] &= ~(1<<COL(key));
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} else {
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matrix[ROW(key)] |= (1<<COL(key));
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}
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}
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