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- /*
- Copyright 2012 Jun Wako <[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 "util.h"
- #include "serial.h"
- #include "matrix.h"
- #include "debug.h"
-
-
- /*
- * Matrix Array usage:
- *
- * ROW: 16(4bits)
- * COL: 8(3bits)
- *
- * 8bit wide
- * +---------+
- * 0|00 ... 07|
- * 1|08 ... 0F|
- * :| ... |
- * :| ... |
- * E|70 ... 77|
- * F|78 ... 7F|
- * +---------+
- *
- */
- static uint8_t matrix[MATRIX_ROWS];
- #define ROW(code) ((code>>3)&0xF)
- #define COL(code) (code&0x07)
-
- static bool is_modified = false;
-
-
- void matrix_init(void)
- {
- serial_init();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
-
- return;
- }
-
- uint8_t matrix_scan(void)
- {
- is_modified = false;
-
- uint16_t code;
- code = serial_recv2();
- if (code == -1) {
- return 0;
- }
-
- dprintf("%02X\n", code);
- if (code&0x80) {
- // break code
- if (matrix_is_on(ROW(code), COL(code))) {
- matrix[ROW(code)] &= ~(1<<COL(code));
- is_modified = true;
- }
- } else {
- // make code
- if (!matrix_is_on(ROW(code), COL(code))) {
- matrix[ROW(code)] |= (1<<COL(code));
- is_modified = true;
- }
- }
- return code;
- }
-
- inline
- uint8_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
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