You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
7 years ago
|
/*
|
||
|
Copyright 2017 Gabriel Young <gabeplaysdrums@live.com>
|
||
|
Copyright 2018 Alexander Fougner <fougner89 at 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/>.
|
||
|
*/
|
||
|
|
||
|
#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 DEBOUNCING_DELAY
|
||
|
# define DEBOUNCING_DELAY 5
|
||
|
#endif
|
||
|
static uint8_t debouncing = DEBOUNCING_DELAY;
|
||
|
|
||
|
static matrix_row_t matrix[MATRIX_ROWS];
|
||
|
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
|
||
|
|
||
|
static matrix_row_t scan_col(void) {
|
||
|
return (
|
||
|
(PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) |
|
||
|
(PINB&(1<<6) ? 0 : ((matrix_row_t)1<<1)) |
|
||
|
(PINB&(1<<1) ? 0 : ((matrix_row_t)1<<2)) |
|
||
|
(PINB&(1<<0) ? 0 : ((matrix_row_t)1<<3)) |
|
||
|
(PINB&(1<<5) ? 0 : ((matrix_row_t)1<<4)) |
|
||
|
(PINB&(1<<3) ? 0 : ((matrix_row_t)1<<5)) |
|
||
|
(PINB&(1<<4) ? 0 : ((matrix_row_t)1<<6)) |
|
||
|
(PINB&(1<<2) ? 0 : ((matrix_row_t)1<<7))
|
||
|
);
|
||
|
}
|
||
|
|
||
|
static void select_col(uint8_t col) {
|
||
|
switch (col) {
|
||
|
case 0: PORTD = (PORTD & ~0b00111111) | 0b00110011; break;
|
||
|
case 1: PORTD = (PORTD & ~0b00111111) | 0b00100011; break;
|
||
|
case 2: PORTD = (PORTD & ~0b00111111) | 0b00010111; break;
|
||
|
case 3: PORTD = (PORTD & ~0b00111111) | 0b00110011; break;
|
||
|
case 4: PORTD = (PORTD & ~0b00111111) | 0b00010011; break;
|
||
|
case 5: PORTD = (PORTD & ~0b00111111) | 0b00011011; break;
|
||
|
case 6: PORTD = (PORTD & ~0b00111111) | 0b00110100; break;
|
||
|
case 7: PORTD = (PORTD & ~0b00111111) | 0b00111010; break;
|
||
|
case 8: PORTD = (PORTD & ~0b00111111) | 0b00111000; break;
|
||
|
case 9: PORTD = (PORTD & ~0b00111111) | 0b00111100; break;
|
||
|
case 10: PORTD = (PORTD & ~0b00111111) | 0b00110010; break;
|
||
|
case 11: PORTD = (PORTD & ~0b00111111) | 0b00011111; break;
|
||
|
case 12: PORTD = (PORTD & ~0b00111111) | 0b00001111; break;
|
||
|
case 13: PORTD = (PORTD & ~0b00111111) | 0b00100111; break;
|
||
|
case 14: PORTD = (PORTD & ~0b00111111) | 0b00000111; break;
|
||
|
case 15: PORTD = (PORTD & ~0b00111111) | 0b00110110; break;
|
||
|
case 16: PORTD = (PORTD & ~0b00111111) | 0b00001011; break;
|
||
|
case 17: PORTD = (PORTD & ~0b00111111) | 0b00000011; break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void matrix_init(void) {
|
||
|
/* Row output pins */
|
||
|
DDRD |= 0b00111111;
|
||
|
/* Column input pins */
|
||
|
DDRC &= ~0b10000000;
|
||
|
DDRB &= ~0b01111111;
|
||
|
PORTC |= 0b10000000;
|
||
|
PORTB |= 0b01111111;
|
||
|
|
||
|
for (uint8_t i=0; i < MATRIX_ROWS; i++)
|
||
|
matrix[i] = matrix_debouncing[i] = 0;
|
||
|
|
||
|
matrix_init_quantum();
|
||
|
}
|
||
|
|
||
|
uint8_t matrix_scan(void) {
|
||
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
|
||
|
select_col(col);
|
||
|
_delay_us(3);
|
||
|
matrix_row_t col_scan = scan_col();
|
||
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
||
|
bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
|
||
|
bool curr_bit = col_scan & (1<<row);
|
||
|
if (prev_bit != curr_bit) {
|
||
|
matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
|
||
|
debouncing = DEBOUNCING_DELAY;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (debouncing) {
|
||
|
if (--debouncing)
|
||
|
_delay_ms(1);
|
||
|
else
|
||
|
for (uint8_t i = 0; i < MATRIX_ROWS; i++)
|
||
|
matrix[i] = matrix_debouncing[i];
|
||
|
}
|
||
|
|
||
|
matrix_scan_quantum();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
inline matrix_row_t matrix_get_row(uint8_t row) {
|
||
|
return matrix[row];
|
||
|
}
|
||
|
|
||
|
void matrix_print(void) {
|
||
|
#ifndef NO_PRINT
|
||
|
print("\nr\\c ABCDEFGHIJKLMNOPQR\n");
|
||
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
||
|
matrix_row_t matrix_row = matrix_get_row(row);
|
||
|
xprintf("%02X: ", row);
|
||
|
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
|
||
|
bool curr_bit = matrix_row & (1<<col);
|
||
|
xprintf("%c", curr_bit ? '*' : '.');
|
||
|
}
|
||
|
print("\n");
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
uint8_t matrix_key_count(void) {
|
||
|
uint8_t count = 0;
|
||
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++)
|
||
|
count += bitpop32(matrix[row]);
|
||
|
return count;
|
||
|
}
|