161 wiersze
3.2 KiB
C
161 wiersze
3.2 KiB
C
#define F_CPU 16000000UL
|
|
|
|
#include <util/delay.h>
|
|
#include <avr/io.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "uno-matrix.h"
|
|
|
|
#define debug(X) NULL
|
|
#define debug_hex(X) NULL
|
|
|
|
#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)
|
|
{
|
|
//debug_enable = true;
|
|
//debug_matrix = true;
|
|
//debug_mouse = true;
|
|
// 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();
|
|
//Serial.println(cols, BIN);
|
|
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];
|
|
}
|
|
|
|
// TODO update this comment
|
|
/* Column pin configuration
|
|
* col: 0 1 2 3 4 5
|
|
* pin: D3 D4 D5 D6 D7 B0
|
|
*/
|
|
static void init_cols(void)
|
|
{
|
|
// Input with pull-up(DDR:0, PORT:1)
|
|
DDRD &= ~(1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
|
|
PORTD |= (1<<3 | 1<<4 | 1<<5 | 1<<6 | 1<<7);
|
|
|
|
DDRB &= ~(1<<0);
|
|
PORTB |= (1<<0);
|
|
}
|
|
|
|
static matrix_row_t read_cols(void)
|
|
{
|
|
return (PIND&(1<<3) ? 0 : (1<<0)) |
|
|
(PIND&(1<<4) ? 0 : (1<<1)) |
|
|
(PIND&(1<<5) ? 0 : (1<<2)) |
|
|
(PIND&(1<<6) ? 0 : (1<<3)) |
|
|
(PIND&(1<<7) ? 0 : (1<<4)) |
|
|
(PINB&(1<<0) ? 0 : (1<<5));
|
|
}
|
|
|
|
/* Row pin configuration
|
|
* row: 0 1 2 3
|
|
* pin: C0 C1 C2 C3
|
|
*/
|
|
static void unselect_rows(void)
|
|
{
|
|
// Hi-Z(DDR:0, PORT:0) to unselect
|
|
DDRC &= ~0xF;
|
|
PORTC &= ~0xF;
|
|
}
|
|
|
|
static void select_row(uint8_t row)
|
|
{
|
|
// Output low(DDR:1, PORT:0) to select
|
|
switch (row) {
|
|
case 0:
|
|
DDRC |= (1<<0);
|
|
PORTC &= ~(1<<0);
|
|
break;
|
|
case 1:
|
|
DDRC |= (1<<1);
|
|
PORTC &= ~(1<<1);
|
|
break;
|
|
case 2:
|
|
DDRC |= (1<<2);
|
|
PORTC &= ~(1<<2);
|
|
break;
|
|
case 3:
|
|
DDRC |= (1<<3);
|
|
PORTC &= ~(1<<3);
|
|
break;
|
|
}
|
|
}
|