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qmk_firmware/keyboard/lightsaber/matrix.c

293 lines
6.9 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;
/* 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(void);
static uint8_t read_fwkey(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();
// initialize matrix state: all keys off
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++) { // 0-17
select_col(col);
_delay_us(3); // TODO: Determine the correct value needed here.
uint8_t rows = read_rows();
// Use the otherwise unused col: 12 row: 3 for firmware.
if(col == 12) {
rows |= read_fwkey();
}
for (uint8_t row = 0; row < MATRIX_ROWS; row++) { // 0-5
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 = 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
* pin: PD0 PD1 PD2 PD3 PD5 PB7
*
* Firmware uses its own pin PE2
*/
static void init_rows(void)
{
// Input (DDR:0, PORT:0)
DDRD &= ~0b00101111;
PORTD &= ~0b00101111;
DDRB &= ~(1<<7);
PORTB &= ~(1<<7);
// Input with pull-up (DDR:0, PORT:1)
DDRE &= ~(1<<2);
PORTE |= (1<<2);
}
static uint8_t read_rows(void)
{
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) |
(PINB&(1<<7) ? (1<<5) : 0);
}
static uint8_t read_fwkey(void)
{
return PINE&(1<<2) ? 0 : (1<<3);
}
/* Columns 0 - 15
* These columns uses two 74HC237D 3 to 8 bit demultiplexers.
* col / pin: PC6 PB6 PF0 PF1 PC7
* 0: 1 0 0 0 0
* 1: 1 0 1 0 0
* 2: 1 0 0 1 0
* 3: 1 0 1 1 0
* 4: 1 0 0 0 1
* 5: 1 0 1 0 1
* 6: 1 0 0 1 1
* 7: 1 0 1 1 1
* 8: 0 1 0 0 0
* 9: 0 1 1 0 0
* 10: 0 1 0 1 0
* 11: 0 1 1 1 0
* 12: 0 1 0 0 1
* 13: 0 1 1 0 1
* 14: 0 1 0 1 1
* 15: 0 1 1 1 1
*
* col: 16
* pin: PB5
*
* col: 17
* pin: PD4
*/
static void unselect_cols(void)
{
DDRB |= (1<<5) | (1<<6);
PORTB &= ~((1<<5) | (1<<6));
DDRC |= (1<<6) | (1<<7);
PORTC &= ~((1<<6) | (1<<7));
DDRD |= (1<<4);
PORTD &= ~(1<<4);
DDRF |= (1<<0) | (1<<1);
PORTF &= ~((1<<0) | (1<<1));
}
static void select_col(uint8_t col)
{
// Output high (DDR:1, PORT:1) to select
switch (col) {
case 0:
PORTC |= (1<<6);
break;
case 1:
PORTC |= (1<<6);
PORTF |= (1<<0);
break;
case 2:
PORTC |= (1<<6);
PORTF |= (1<<1);
break;
case 3:
PORTC |= (1<<6);
PORTF |= (1<<0) | (1<<1);
break;
case 4:
PORTC |= (1<<6);
PORTC |= (1<<7);
break;
case 5:
PORTC |= (1<<6);
PORTF |= (1<<0);
PORTC |= (1<<7);
break;
case 6:
PORTC |= (1<<6);
PORTF |= (1<<1);
PORTC |= (1<<7);
break;
case 7:
PORTC |= (1<<6);
PORTF |= (1<<0) | (1<<1);
PORTC |= (1<<7);
break;
case 8:
PORTB |= (1<<6);
break;
case 9:
PORTB |= (1<<6);
PORTF |= (1<<0);
break;
case 10:
PORTB |= (1<<6);
PORTF |= (1<<1);
break;
case 11:
PORTB |= (1<<6);
PORTF |= (1<<0) | (1<<1);
break;
case 12:
PORTB |= (1<<6);
PORTC |= (1<<7);
break;
case 13:
PORTB |= (1<<6);
PORTF |= (1<<0);
PORTC |= (1<<7);
break;
case 14:
PORTB |= (1<<6);
PORTF |= (1<<1);
PORTC |= (1<<7);
break;
case 15:
PORTB |= (1<<6);
PORTF |= (1<<0) | (1<<1);
PORTC |= (1<<7);
break;
case 16:
PORTB |= (1<<5);
break;
case 17:
PORTD |= (1<<4);
break;
}
}