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/*
Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
Copyright 2016 Daniel Svensson <dsvensson@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 "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static matrix_row_t read_cols(void);
static void select_row(uint8_t col);
// user-defined overridable functions
__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
__attribute__((weak)) void matrix_init_user(void) {}
__attribute__((weak)) void matrix_scan_user(void) {}
// helper functions
inline uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
/* Column output pins */
DDRD |= 0b01111011;
/* Row input pins */
DDRC &= ~0b10000000;
DDRB &= ~0b01111111;
PORTC |= 0b10000000;
PORTB |= 0b01111111;
for (uint8_t i=0; i < matrix_rows(); i++) {
matrix[i] = 0;
matrix_debouncing[i] = 0;
}
matrix_init_quantum();
}
uint8_t matrix_scan(void)
{
bool changed = false;
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
select_row(col);
wait_us(30);
matrix_row_t rows = read_cols();
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 ((changed |= prev_bit != curr_bit)) {
matrix_debouncing[row] ^= (matrix_row_t) 1 << col;
}
}
}
debounce(matrix_debouncing, matrix, matrix_rows(), changed);
matrix_scan_quantum();
return (uint8_t)changed;
}
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++) {
print_hex8(row); print(": ");
print_bin_reverse16(matrix_get_row(row));
print("\n");
}
}
static matrix_row_t read_cols(void)
{
return
(PINB&(1<<5) ? 0 : ((matrix_row_t)1<<0)) |
(PINC&(1<<7) ? 0 : ((matrix_row_t)1<<1)) |
(PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) |
(PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) |
(PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) |
(PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) |
(PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) |
(PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7));
}
static void select_row(uint8_t col)
{
switch (col) {
case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
case 2: PORTD = (PORTD & ~0b01111011) | 0b01100000; break;
case 3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break;
case 4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break;
case 5: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
case 6: PORTD = (PORTD & ~0b01111011) | 0b01110001; break;
case 7: PORTD = (PORTD & ~0b01111011) | 0b01101001; break;
case 8: PORTD = (PORTD & ~0b01111011) | 0b01100001; break;
case 9: PORTD = (PORTD & ~0b01111011) | 0b01111000; break;
case 10: PORTD = (PORTD & ~0b01111011) | 0b00100011; break;
case 11: PORTD = (PORTD & ~0b01111011) | 0b00101011; break;
case 12: PORTD = (PORTD & ~0b01111011) | 0b00110011; break;
case 13: PORTD = (PORTD & ~0b01111011) | 0b01110000; break;
case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break;
case 15: PORTD = (PORTD & ~0b01111011) | 0b01101000; break;
case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break;
case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break;
}
}
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