+/*
+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 <avr/io.h>
#include <util/delay.h>
#include "print.h"
+#include "debug.h"
#include "util.h"
-#include "matrix_skel.h"
+#include "matrix.h"
-// matrix state buffer (key on: 1/key off: 0)
+#if (MATRIX_COLS > 16)
+# error "MATRIX_COLS must not exceed 16"
+#endif
+#if (MATRIX_ROWS > 255)
+# error "MATRIX_ROWS must not exceed 255"
+#endif
+
+
+#ifndef DEBOUNCE
+# define DEBOUNCE 0
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+// matrix state buffer(1:on, 0:off)
+#if (MATRIX_COLS <= 8)
static uint8_t *matrix;
static uint8_t *matrix_prev;
static uint8_t _matrix0[MATRIX_ROWS];
static uint8_t _matrix1[MATRIX_ROWS];
+#else
+static uint16_t *matrix;
+static uint16_t *matrix_prev;
+static uint16_t _matrix0[MATRIX_ROWS];
+static uint16_t _matrix1[MATRIX_ROWS];
+#endif
+#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
+#endif
static uint8_t read_col(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
inline
-int matrix_rows(void)
+uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
-int matrix_cols(void)
+uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
-// this must be called once before matrix_scan.
void matrix_init(void)
{
// initialize row and col
PORTB = 0xFF;
// initialize matrix state: all keys off
- for (int i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
- for (int i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
matrix = _matrix0;
matrix_prev = _matrix1;
}
-int matrix_scan(void)
+uint8_t matrix_scan(void)
{
- uint8_t *tmp;
-
- tmp = matrix_prev;
- matrix_prev = matrix;
- matrix = tmp;
+ if (!debouncing) {
+ uint8_t *tmp = matrix_prev;
+ matrix_prev = matrix;
+ matrix = tmp;
+ }
- for (int i = 0; i < MATRIX_ROWS; i++) {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
unselect_rows();
select_row(i);
_delay_us(30); // without this wait read unstable value.
- matrix[i] = ~read_col();
+ if (matrix[i] != (uint8_t)~read_col()) {
+ matrix[i] = (uint8_t)~read_col();
+ if (debouncing) {
+ debug("bounce!: "); debug_hex(debouncing); print("\n");
+ }
+ debouncing = DEBOUNCE;
+ }
}
unselect_rows();
+
+ if (debouncing) {
+ debouncing--;
+ }
+
return 1;
}
bool matrix_is_modified(void)
{
- for (int i = 0; i < MATRIX_ROWS; i++) {
- if (matrix[i] != matrix_prev[i])
+ if (debouncing) return false;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ if (matrix[i] != matrix_prev[i]) {
return true;
+ }
}
return false;
}
+inline
bool matrix_has_ghost(void)
{
- for (int i = 0; i < MATRIX_ROWS; i++) {
+#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(int row, int col)
+bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & (1<<col));
}
inline
-uint16_t matrix_get_row(int row)
+#if (MATRIX_COLS <= 8)
+uint8_t matrix_get_row(uint8_t row)
+#else
+uint16_t matrix_get_row(uint8_t row)
+#endif
{
return matrix[row];
}
void matrix_print(void)
{
print("\nr/c 01234567\n");
- for (int row = 0; row < matrix_rows(); row++) {
+ for (uint8_t row = 0; row < matrix_rows(); row++) {
phex(row); print(": ");
+#if (MATRIX_COLS <= 8)
pbin_reverse(matrix_get_row(row));
+#else
+ pbin_reverse16(matrix_get_row(row));
+#endif
+#ifdef MATRIX_HAS_GHOST
if (matrix_has_ghost_in_row(row)) {
print(" <ghost");
}
+#endif
print("\n");
}
}
-int matrix_key_count(void)
+uint8_t matrix_key_count(void)
{
- int count = 0;
- for (int i = 0; i < MATRIX_ROWS; i++) {
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+#if (MATRIX_COLS <= 8)
count += bitpop(matrix[i]);
+#else
+ count += bitpop16(matrix[i]);
+#endif
}
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
return false;
// ghost exists in case same state as other row
- for (int i=0; i < MATRIX_ROWS; i++) {
+ 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 uint8_t read_col(void)
{
return PINB;
}
+inline
static void unselect_rows(void)
{
// Hi-Z(DDR:0, PORT:0) to unselect
PORTF &= ~0b11000000;
}
+inline
static void select_row(uint8_t row)
{
// Output low(DDR:1, PORT:0) to select
projects / max / tmk_keyboard.git / blobdiff