240 lines
5.8 KiB
C
240 lines
5.8 KiB
C
/*
|
|
Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
|
|
|
|
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 "debug.h"
|
|
#include "util.h"
|
|
#include "matrix.h"
|
|
|
|
#ifndef DEBOUNCE
|
|
# define DEBOUNCE 0
|
|
#endif
|
|
static uint8_t debouncing = DEBOUNCE;
|
|
|
|
static matrix_row_t matrix[MATRIX_ROWS];
|
|
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
|
|
|
|
static uint8_t read_rows(void);
|
|
static void init_rows(void);
|
|
static void unselect_cols(void);
|
|
static void select_col(uint8_t col);
|
|
|
|
inline uint8_t matrix_rows(void)
|
|
{
|
|
return MATRIX_ROWS;
|
|
}
|
|
|
|
inline uint8_t matrix_cols(void)
|
|
{
|
|
return MATRIX_COLS;
|
|
}
|
|
|
|
void matrix_init(void)
|
|
{
|
|
unselect_cols();
|
|
init_rows();
|
|
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = 0;
|
|
matrix_debouncing[i] = 0;
|
|
}
|
|
}
|
|
|
|
uint8_t matrix_scan(void)
|
|
{
|
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
|
|
select_col(col);
|
|
_delay_us(3);
|
|
uint8_t rows = read_rows();
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
|
bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
|
|
bool curr_bit = rows & (1<<row);
|
|
if (prev_bit != curr_bit) {
|
|
matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
|
|
debouncing = DEBOUNCE;
|
|
}
|
|
}
|
|
unselect_cols();
|
|
}
|
|
|
|
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++) {
|
|
xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
|
|
}
|
|
}
|
|
|
|
uint8_t matrix_key_count(void)
|
|
{
|
|
uint8_t count = 0;
|
|
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
|
|
count += bitpop32(matrix[i]);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/* Row pin configuration
|
|
*
|
|
* row: 0 1 2 3 4 5 6 7
|
|
* pin: PC2 PB1 PB2 PB3 PC7 PB4 PB5 PB6
|
|
*
|
|
*/
|
|
static void init_rows(void)
|
|
{
|
|
DDRC &= ~0b10000100;
|
|
DDRB &= ~0b01111110;
|
|
PORTC |= 0b10000100;
|
|
PORTB |= 0b01111110;
|
|
}
|
|
|
|
static uint8_t read_rows(void)
|
|
{
|
|
return (PINC&(1<<2) ? 0 : (1<<0)) |
|
|
(PINB&(1<<1) ? 0 : (1<<1)) |
|
|
(PINB&(1<<2) ? 0 : (1<<2)) |
|
|
(PINB&(1<<3) ? 0 : (1<<3)) |
|
|
(PINC&(1<<7) ? 0 : (1<<4)) |
|
|
(PINB&(1<<4) ? 0 : (1<<5)) |
|
|
(PINB&(1<<5) ? 0 : (1<<6)) |
|
|
(PINB&(1<<6) ? 0 : (1<<7));
|
|
}
|
|
|
|
/* These columns uses two 74HC42 4 to 10 bit demultiplexers (low active).
|
|
*
|
|
* COL PD1 PD0 PD2 PD6 PD5 PD4
|
|
* 12 1 1 0 0 0 0
|
|
* 11 1 1 0 0 0 1
|
|
* 10 1 1 0 0 1 0
|
|
* 9 1 1 0 0 1 1
|
|
* 8 1 1 0 1 0 0
|
|
* 7 1 1 0 1 0 1
|
|
* 6 1 1 0 1 1 0
|
|
* 5 1 1 0 1 1 1
|
|
* 4 1 1 1 0 0 0
|
|
* 3 1 1 1 0 0 1
|
|
|
|
* COL PD2 PD6 PD1 PD0 PD5 PD4
|
|
* 2 1 1 0 0 0 0
|
|
* 1 1 1 0 0 0 1
|
|
* 0 1 1 0 0 1 0
|
|
* 17 1 1 0 0 1 1
|
|
* 16 1 1 0 1 0 0
|
|
* 1 1 0 1 0 1
|
|
* 1 1 0 1 1 0
|
|
* 15 1 1 0 1 1 1
|
|
* 14 1 1 1 0 0 0
|
|
* 13 1 1 1 0 0 1
|
|
*/
|
|
static void unselect_cols(void)
|
|
{
|
|
DDRD |= 0b01110111;
|
|
PORTD &= ~0b01110111;
|
|
}
|
|
|
|
static void select_col(uint8_t col)
|
|
{
|
|
switch (col) {
|
|
case 0:
|
|
PORTD |= (1<<5) | (1<<6) | (1<<2);
|
|
break;
|
|
case 1:
|
|
PORTD |= (1<<4) | (1<<6) | (1<<2);
|
|
break;
|
|
case 2:
|
|
PORTD |= (1<<6) | (1<<2);
|
|
break;
|
|
case 3:
|
|
PORTD |= (1<<4) | (1<<2) | (1<<0) | (1<<1);
|
|
break;
|
|
case 4:
|
|
PORTD |= (1<<2) | (1<<0) | (1<<1);
|
|
break;
|
|
case 5:
|
|
PORTD |= (1<<4) | (1<<5) | (1<<6) | (1<<0) | (1<<1);
|
|
break;
|
|
case 6:
|
|
PORTD |= (1<<5) | (1<<6) | (1<<0) | (1<<1);
|
|
break;
|
|
case 7:
|
|
PORTD |= (1<<4) | (1<<6) | (1<<0) | (1<<1);
|
|
break;
|
|
case 8:
|
|
PORTD |= (1<<6) | (1<<0) | (1<<1);
|
|
break;
|
|
case 9:
|
|
PORTD |= (1<<4) | (1<<5) | (1<<0) | (1<<1);
|
|
break;
|
|
case 10:
|
|
PORTD |= (1<<5) | (1<<0) | (1<<1);
|
|
break;
|
|
case 11:
|
|
PORTD |= (1<<4) | (1<<0) | (1<<1);
|
|
break;
|
|
case 12:
|
|
PORTD |= (1<<0) | (1<<1);
|
|
break;
|
|
case 13:
|
|
PORTD |= (1<<4) | (1<<1) | (1<<6) | (1<<2);
|
|
break;
|
|
case 14:
|
|
PORTD |= (1<<1) | (1<<6) | (1<<2);
|
|
break;
|
|
case 15:
|
|
PORTD |= (1<<4) | (1<<5) | (1<<0) | (1<<6) | (1<<2);
|
|
break;
|
|
case 16:
|
|
PORTD |= (1<<0) | (1<<6) | (1<<2);
|
|
break;
|
|
case 17:
|
|
PORTD |= (1<<4) | (1<<5) | (1<<6) | (1<<2);
|
|
break;
|
|
}
|
|
}
|