284 lines
6.7 KiB
C
284 lines
6.7 KiB
C
|
/*
|
||
|
|
Copyright 2013 Mathias Andersson <wraul@dbox.se>
|
||
|
|
|
||
|
|
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_caps(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++) { // 0-16
|
||
|
|
select_col(col);
|
||
|
|
_delay_us(3); // TODO: Determine the correct value needed here.
|
||
|
|
uint8_t rows = read_rows();
|
||
|
|
// Use the otherwise unused col: 0 row: 3 for caps lock.
|
||
|
|
if(col == 0) {
|
||
|
|
rows |= read_caps();
|
||
|
|
}
|
||
|
|
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: D0 D1 D2 D3 D5 B7
|
||
|
|
*
|
||
|
|
* Caps lock 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_caps(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
|
||
|
|
*/
|
||
|
|
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));
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
}
|