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/*
Copyright 2011 Jun Wako <wakojun@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 "print.h"
#include "util.h"
#include "debug.h"
#include "host.h"
#include "led.h"
#include "m0110.h"
#include "matrix.h"
#define CAPS 0x39
#define CAPS_UP (CAPS | 0x80)
#define ROW(key) ((key)>>3&0x0F)
#define COL(key) ((key)&0x07)
static bool is_modified = false;
// matrix state buffer(1:on, 0:off)
static uint8_t *matrix;
static uint8_t _matrix0[MATRIX_ROWS];
#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
#endif
static void register_key(uint8_t key);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
print_enable = true;
debug_enable = true;
debug_matrix = false;
debug_keyboard = false;
debug_mouse = false;
print("debug enabled.\n");
m0110_init();
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
matrix = _matrix0;
return;
}
uint8_t matrix_scan(void)
{
uint8_t key;
is_modified = false;
key = m0110_recv_key();
#ifdef MATRIX_HAS_LOCKING_CAPS
// Send Caps key up event
if (matrix_is_on(ROW(CAPS), COL(CAPS))) {
is_modified = true;
register_key(CAPS_UP);
}
#endif
if (key == M0110_NULL) {
return 0;
} else {
#ifdef MATRIX_HAS_LOCKING_CAPS
if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) {
// CAPS LOCK on:
// Ignore LockingCaps key down event
if (key == CAPS) return 0;
// Convert LockingCaps key up event into down event
if (key == CAPS_UP) key = CAPS;
} else {
// CAPS LOCK off:
// Ignore LockingCaps key up event
if (key == CAPS_UP) return 0;
}
#endif
is_modified = true;
register_key(key);
}
if (debug_enable) {
print("key: "); phex(key); print("\n");
}
return 1;
}
bool matrix_is_modified(void)
{
return is_modified;
}
inline
bool matrix_has_ghost(void)
{
#ifdef MATRIX_HAS_GHOST
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
if (matrix_has_ghost_in_row(i))
return true;
}
#endif
return false;
}
inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & (1<<col));
}
inline
uint8_t matrix_get_row(uint8_t row)
{
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < matrix_rows(); row++) {
phex(row); print(": ");
pbin_reverse(matrix_get_row(row));
print("\n");
}
}
uint8_t matrix_key_count(void)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
count += bitpop(matrix[i]);
}
return count;
}
#ifdef MATRIX_HAS_GHOST
inline
static bool matrix_has_ghost_in_row(uint8_t row)
{
// no ghost exists in case less than 2 keys on
if (((matrix[row] - 1) & matrix[row]) == 0)
return false;
// ghost exists in case same state as other row
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
if (i != row && (matrix[i] & matrix[row]) == matrix[row])
return true;
}
return false;
}
#endif
inline
static void register_key(uint8_t key)
{
if (key&0x80) {
matrix[ROW(key)] &= ~(1<<COL(key));
} else {
matrix[ROW(key)] |= (1<<COL(key));
}
}
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