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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)
{
DDRD |= 0b11010000;
PORTD &= ~0b01010000;
PORTD |= 0b10000000;
DDRB |= 0b00011111;
PORTB &= ~0b00001110;
PORTB |= 0b00010001;
DDRE |= 0b01000000;
PORTE &= ~0b01000000;
}
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);
if (debouncing) {
dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
}
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 - diode connected
* row: 0 1 2 3 4
* pin: PD0 PD1 PD2 PD3 PD5
*
* Caps Lock uses its own pin PE2 on the column pin, row pin is grounded
*/
static void init_rows(void) {
DDRD &= ~0b00101111;
PORTD &= ~0b00101111;
DDRE &= ~0b00000100;
PORTE |= 0b00000100;
}
static uint8_t read_rows(uint8_t col) {
return (PIND&(1<<0) ? (1<<0) : 0) |
(PIND&(1<<1) ? (1<<1) : 0) |
(PIND&(1<<2) ? (1<<2) : 0) |
(PIND&(1<<3) ? (1<<3) : 0) |
(PIND&(1<<5) ? (1<<4) : 0) |
(col==0 ? ((PINE&(1<<2) ? 0 : (1<<2))) : 0);
}
uint8_t read_fwkey(void)
{
return PINE&(1<<2) ? 0 : (1<<2);
}
/* Columns 0 - 15
*
* atmega32u4 decoder pin
* PC6 U1 E3
* PB6 U2 E3
* PF0 U1, U2 A0
* PF1 U1, U2 A1
* PC7 U1, U2 A2
*
* These columns uses two 74HC237D 3 to 8 bit demultiplexers.
* col / pin: PC6 PB6 PF0 PF1 PC7 Decoder Pin
* 0: 1 0 0 0 0 U1 Y0
* 1: 1 0 1 0 0 U1 Y1
* 2: 1 0 0 1 0 U1 Y2
* 3: 1 0 1 1 0 U1 Y3
* 4: 1 0 0 0 1 U1 Y4
* 5: 1 0 1 0 1 U1 Y5
* 6: 1 0 0 1 1 U1 Y6
* 7: 1 0 1 1 1 U1 Y7
* 8: 0 1 0 0 0 U2 Y0
* 9: 0 1 1 0 0 U2 Y1
* 10: 0 1 0 1 0 U2 Y2
* 11: 0 1 1 1 0 U2 Y3
* 12: 0 1 0 0 1 U2 Y4
* 13: 0 1 1 0 1 U2 Y5
* 14: 0 1 0 1 1 U2 Y6
*
*/
static void unselect_cols(void) {
DDRB |= 0b01000000;
PORTB &= ~0b01000000;
DDRC |= 0b11000000;
PORTC &= ~0b11000000;
DDRF |= 0b00000011;
PORTF &= ~0b00000011;
}
static void select_col(uint8_t col) {
switch (col) {
case 0:
PORTC |= 0b01000000;
break;
case 1:
PORTC |= 0b01000000;
PORTF |= 0b00000001;
break;
case 2:
PORTC |= 0b01000000;
PORTF |= 0b00000010;
break;
case 3:
PORTC |= 0b01000000;
PORTF |= 0b00000011;
break;
case 4:
PORTC |= 0b11000000;
break;
case 5:
PORTC |= 0b11000000;
PORTF |= 0b00000001;
break;
case 6:
PORTC |= 0b11000000;
PORTF |= 0b00000010;
break;
case 7:
PORTC |= 0b11000000;
PORTF |= 0b00000011;
break;
case 8:
PORTB |= 0b01000000;
break;
case 9:
PORTB |= 0b01000000;
PORTF |= 0b00000001;
break;
case 10:
PORTB |= 0b01000000;
PORTF |= 0b00000010;
break;
case 11:
PORTB |= 0b01000000;
PORTF |= 0b00000011;
break;
case 12:
PORTB |= 0b01000000;
PORTC |= 0b10000000;
break;
case 13:
PORTB |= 0b01000000;
PORTF |= 0b00000001;
PORTC |= 0b10000000;
break;
case 14:
PORTB |= 0b01000000;
PORTF |= 0b00000010;
PORTC |= 0b10000000;
break;
}
}
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