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tmk_keyboard_custom/keyboard/lr96/matrix.c
2014-03-12 12:52:52 +09:00

215 lines
4.6 KiB
C

/*
Copyright 2014 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 "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
static uint8_t debouncing = DEBOUNCE;
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static matrix_row_t read_cols(void);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
// initialize row and col
unselect_rows();
init_cols();
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
matrix_debouncing[i] = 0;
}
}
uint8_t matrix_scan(void)
{
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
select_row(i);
_delay_us(30); // without this wait read unstable value.
matrix_row_t cols = read_cols();
if (matrix_debouncing[i] != cols) {
matrix_debouncing[i] = cols;
if (debouncing) {
debug("bounce!: "); debug_hex(debouncing); debug("\n");
}
debouncing = DEBOUNCE;
}
unselect_rows();
}
if (debouncing) {
if (--debouncing) {
_delay_ms(1);
} else {
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = matrix_debouncing[i];
}
}
}
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[row] & ((matrix_row_t)1<<col));
}
inline
matrix_row_t matrix_get_row(uint8_t row)
{
return matrix[row];
}
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)
{
uint8_t count = 0;
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
count += bitpop16(matrix[i]);
}
return count;
}
/* Column pin configuration
* pin: D0 D1 D2 D3 D4 D5 D6
*/
static void init_cols(void)
{
// Input with pull-up(DDR:0, PORT:1)
DDRD &= ~(1<<PD6 | 1<<PD5 | 1<<PD4 | 1<<PD3 | 1<<PD2 | 1<<PD1 | 1<<PD0);
PORTD |= (1<<PD6 | 1<<PD5 | 1<<PD4 | 1<<PD3 | 1<<PD2 | 1<<PD1 | 1<<PD0);
}
/* Column pin configuration
* col: 0 1 2 3 4 5 6
* pin: D0 D1 D2 D3 D4 D5 D6
*/
static matrix_row_t read_cols(void)
{
return ~PIND & ~(1<<PD7);
}
/* Row pin configuration
* pin: B0 F0 B4 E6 F1
* row: off 0 x x x x
* 0 1 0 0 0 0
* 1 1 0 0 0 1
* 2 1 0 0 1 0
* 3 1 0 0 1 1
* 4 1 0 1 0 0
* 5 1 0 1 0 1
* 6 1 0 1 1 0
* 7 1 0 1 1 1
* 8 1 1 0 0 0
* 9 1 1 0 0 1
* 10 1 1 0 1 0
* 11 1 1 0 1 1
* 12 1 1 1 0 0
* 13 1 1 1 0 1
* 14 1 1 1 1 0
* 15 1 1 1 1 1
*/
static void unselect_rows(void)
{
// Output high(DDR:1, PORT:1) to unselect
DDRB |= (1<<PB0);
PORTB |= (1<<PB0);
}
static void select_row(uint8_t row)
{
DDRB |= (1<<PB4 | 1<<PB0);
DDRE |= (1<<PE6);
DDRF |= (1<<PF1 | 1<<PF0);
PORTB &= ~(1<<PB0);
if (row & (1<<0)) {
PORTF |= (1<<PF1);
}
else {
PORTF &= ~(1<<PF1);
}
if (row & (1<<1)) {
PORTE |= (1<<PE6);
}
else {
PORTE &= ~(1<<PE6);
}
if (row & (1<<2)) {
PORTB |= (1<<PB4);
}
else {
PORTB &= ~(1<<PB4);
}
if (row & (1<<3)) {
PORTF |= (1<<PF0);
}
else {
PORTF &= ~(1<<PF0);
}
}