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/*
Copyright 2017 MechMerlin <mechmerlin@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 <util/delay.h>
#include <avr/io.h>
#include <stdio.h>
#include "matrix.h"
#include "util.h"
#include "print.h"
#include "debug.h"
static uint8_t debouncing = DEBOUNCING_DELAY;
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static uint8_t read_rows(uint8_t col);
static void init_rows(void);
static void unselect_cols(void);
static void select_col(uint8_t col);
__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) {
}
void backlight_init_ports(void)
{
DDRB |= 0b00011111; // PB0 (caps), PB1 (alpha), PB2 (extra), PB3 (modnum), PB4 (caps)
DDRD |= 0b11010000; // PD4, (rgb blue), PD6 (rgb red), PD7 (rgb green)
DDRE |= 0b01000000; // PE6 (frow)
}
void matrix_init(void) {
backlight_init_ports();
unselect_cols();
init_rows();
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
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);
uint8_t rows = read_rows(col);
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 = DEBOUNCING_DELAY;
}
}
unselect_cols();
}
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) {
print("\nr/c 0123456789ABCDEF\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
}
}
/* Row pin configuration
* row: 0 1 2 3 4 5
* pin: PB7 PD0 PD1 PD2 PD3 PD5
*
* Esc uses its own pin PE2
*/
static void init_rows(void) {
DDRD &= ~0b00101111; // PD0, PD1, PD2, PD3, PD5 input
PORTD &= ~0b00101111; // PD0, PD1, PD2, PD3, PD5 low
DDRB &= ~0b10000000; // PB7 input
PORTB &= ~0b10000000; // PB7 low
DDRE &= ~0b00000100; // PE2 input
PORTE |= 0b00000100; // PE2 high
}
static uint8_t read_rows(uint8_t col) {
if (col == 14) {
return PINE&(1<<2) ? 0 : (1<<0); // PE2 (Row 0)
} else {
return (PIND&(1<<0) ? (1<<0) : 0) | // PD0 (Row 0)
(PIND&(1<<1) ? (1<<1) : 0) | // PD1 (Row 1)
(PIND&(1<<2) ? (1<<2) : 0) | // PD2 (Row 2)
(PIND&(1<<3) ? (1<<3) : 0) | // PD3 (Row 3)
(PIND&(1<<5) ? (1<<4) : 0) | // PD5 (Row 4)
(PINB&(1<<7) ? (1<<5) : 0); // PB7 (Row 5)
}
}
uint8_t read_fwkey(void)
{
return PINE&(1<<2) ? 0 : (1<<0);
}
static void unselect_cols(void) {
DDRB |= 0b01000000; // PB6 (U2) output
PORTB &= ~0b01000000; // PB6 (U2) low
DDRC |= 0b11000000; // PC6 (U1), PC7 (A2) output
PORTC &= ~0b11000000; // PC6 (U1), PC7 (A2) low
DDRF |= 0b00000011; // PF0 (A0), PF1 (A1) output
PORTF &= ~0b00000011; // PF0 (A0), PF1 (A1) low
}
static void select_col(uint8_t col) {
switch (col) {
case 0:
PORTC |= 0b01000000; // PC6 high
break;
case 1:
PORTC |= 0b01000000; // PC6 high
PORTF |= 0b00000001; // PF0 high
break;
case 2:
PORTC |= 0b01000000; // PC6 high
PORTF |= 0b00000010; // PF1 high
break;
case 3:
PORTC |= 0b01000000; // PC6 high
PORTF |= 0b00000011; // PF0, PF1 high
break;
case 4:
PORTC |= 0b11000000; // PC6, PC7 high
break;
case 5:
PORTC |= 0b11000000; // PC6, PC7 high
PORTF |= 0b00000001; // PF0 high
break;
case 6:
PORTC |= 0b11000000; // PC6, PC7 high
PORTF |= 0b00000010; // PF1 high
break;
case 7:
PORTC |= 0b11000000; // PC6, PC7 high
PORTF |= 0b00000011; // PF0, PF1 high
break;
case 8:
PORTB |= 0b01000000; // PB6 high
break;
case 9:
PORTB |= 0b01000000; // PB6 high
PORTF |= 0b00000001; // PF0 high
break;
case 10:
PORTB |= 0b01000000; // PB6 high
PORTF |= 0b00000010; // PF1 high
break;
case 11:
PORTB |= 0b01000000; // PB6 high
PORTF |= 0b00000011; // PF0, PF1 high
break;
case 12:
PORTB |= 0b01000000; // PB6 high
PORTC |= 0b10000000; // PC7 high
break;
case 13:
PORTB |= 0b01000000; // PB6 high
PORTF |= 0b00000001; // PF0 high
PORTC |= 0b10000000; // PC7 high
break;
case 15:
PORTB |= 0b01000000; // PB6 high
PORTF |= 0b00000010; // PF1 high
PORTC |= 0b10000000; // PC7 high
break;
}
}
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