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tmk_keyboard_custom/keyboard/ergodone/matrix.c

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2016-08-25 09:27:47 +00:00
/*
Copyright 2016 Kai Ryu <kai1103@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/>.
*/
/*
* scan matrix
*/
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "expander.h"
#include "keymap_in_eeprom.h"
#include "timer.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
#define IMPROVED_DEBOUNCE 1
#if IMPROVED_DEBOUNCE
#define DEBOUNCE_MASK ((1 << DEBOUNCE) - 1)
static uint8_t matrix_current_row;
static uint16_t matrix_row_timestamp[MATRIX_ROWS];
static uint8_t matrix_debouncing[MATRIX_ROWS][MATRIX_COLS];
#else
static uint8_t debouncing = DEBOUNCE;
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static matrix_row_t read_row(void);
#endif
static uint16_t matrix_scan_timestamp;
static void read_cols(void);
static uint8_t get_col(uint8_t col);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
inline
uint8_t matrix_rows(void)
{
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void)
{
return MATRIX_COLS;
}
void matrix_init(void)
{
// disable JTAG
MCUCR = (1<<JTD);
MCUCR = (1<<JTD);
timer_init();
_delay_ms(1);
matrix_scan_timestamp = timer_read();
// initialize row and col
unselect_rows();
init_cols();
// initialize matrix state: all keys off
#if IMPROVED_DEBOUNCE
for (uint8_t i = 0; i < matrix_rows(); i++) {
matrix[i] = 0;
matrix_current_row = 0;
matrix_row_timestamp[i] = timer_read();
for (uint8_t j = 0; j < matrix_cols(); j++) {
matrix_debouncing[i][j] = 0;
}
}
#else
for (uint8_t i=0; i < matrix_rows(); i++) {
matrix[i] = 0;
matrix_debouncing[i] = 0;
}
#endif
}
uint8_t matrix_scan(void)
{
if (timer_elapsed(matrix_scan_timestamp) >= 1000) {
dprintf("======== 1s task ========\n");
dprintf("Scan: %u\n", matrix_scan_timestamp);
matrix_scan_timestamp = timer_read();
expander_scan();
dprintf("=========================\n");
}
#if IMPROVED_DEBOUNCE
uint16_t elapsed = timer_elapsed(matrix_row_timestamp[matrix_current_row]);
if (elapsed >= 1) {
matrix_row_timestamp[matrix_current_row] = timer_read();
select_row(matrix_current_row);
_delay_us(30);
read_cols();
for (uint8_t i = 0; i < matrix_cols(); i++) {
uint8_t *debounce = &matrix_debouncing[matrix_current_row][i];
uint8_t col = get_col(i);
uint8_t count = elapsed;
do {
*debounce <<= 1;
*debounce |= col;
} while (--count);
matrix_row_t *row = &matrix[matrix_current_row];
matrix_row_t mask = ((matrix_row_t)1 << i);
switch (*debounce & DEBOUNCE_MASK) {
case DEBOUNCE_MASK:
#if DEBOUNCE > 1
case (DEBOUNCE_MASK >> 1):
#if DEBOUNCE > 2
case (DEBOUNCE_MASK >> 2):
#if DEBOUNCE > 3
case (DEBOUNCE_MASK >> 3):
#if DEBOUNCE > 4
case (DEBOUNCE_MASK >> 4):
#if DEBOUNCE > 5
case (DEBOUNCE_MASK >> 5):
#if DEBOUNCE > 6
case (DEBOUNCE_MASK >> 6):
#if DEBOUNCE > 7
case (DEBOUNCE_MASK >> 7):
#if DEBOUNCE > 8
case (DEBOUNCE_MASK >> 8):
#if DEBOUNCE > 9
case (DEBOUNCE_MASK >> 9):
#if DEBOUNCE > 10
case (DEBOUNCE_MASK >> 10):
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
if ((*row & mask) == 0) {
*row |= mask;
}
break;
#if DEBOUNCE > 1
case ((DEBOUNCE_MASK << 1) & DEBOUNCE_MASK):
#if DEBOUNCE > 2
case ((DEBOUNCE_MASK << 2) & DEBOUNCE_MASK):
#if DEBOUNCE > 3
case ((DEBOUNCE_MASK << 3) & DEBOUNCE_MASK):
#if DEBOUNCE > 4
case ((DEBOUNCE_MASK << 4) & DEBOUNCE_MASK):
#if DEBOUNCE > 5
case ((DEBOUNCE_MASK << 5) & DEBOUNCE_MASK):
#if DEBOUNCE > 6
case ((DEBOUNCE_MASK << 6) & DEBOUNCE_MASK):
#if DEBOUNCE > 7
case ((DEBOUNCE_MASK << 7) & DEBOUNCE_MASK):
#if DEBOUNCE > 8
case ((DEBOUNCE_MASK << 8) & DEBOUNCE_MASK):
#if DEBOUNCE > 9
case ((DEBOUNCE_MASK << 9) & DEBOUNCE_MASK):
#if DEBOUNCE > 10
case ((DEBOUNCE_MASK << 10) & DEBOUNCE_MASK):
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
break;
case 0:
if ((*row & mask) != 0) {
*row &= ~mask;
}
break;
default:
debug("bounce!: ");
debug_bin8(*debounce & DEBOUNCE_MASK);
debug("\n");
break;
}
}
unselect_rows();
}
matrix_current_row++;
if (matrix_current_row >= matrix_rows()) {
matrix_current_row = 0;
}
#else
for (uint8_t i = 0; i < matrix_rows(); i++) {
select_row(i);
_delay_us(30); // without this wait read unstable value.
matrix_row_t cols = read_row();
if (matrix_debouncing[i] != cols) {
matrix_debouncing[i] = cols;
if (debouncing) {
debug("bounce!: "); debug_hex(debouncing); debug("\n");
}
debouncing = DEBOUNCE;
}
unselect_rows();
}
if (debouncing) {
if (--debouncing) {
_delay_ms(1);
} else {
for (uint8_t i = 0; i < matrix_rows(); i++) {
matrix[i] = matrix_debouncing[i];
}
}
}
#endif
return 1;
}
#if IMPROVED_DEBOUNCE
#else
bool matrix_is_modified(void)
{
if (debouncing) return false;
return true;
}
#endif
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++) {
phex(row); print(": ");
print_bin_reverse32(matrix_get_row(row));
print("\n");
}
}
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;
}
/* Column pin configuration
* col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
* pin: EX EX EX EX EX EX EX D3 D2 D4 C6 D7 E6 B4
*/
static void init_cols(void)
{
// Input with pull-up(DDR:0, PORT:1)
DDRE &= ~(1<<PE6);
PORTE |= (1<<PE6);
DDRD &= ~(1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
PORTD |= (1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
DDRC &= ~(1<<PC6);
PORTC |= (1<<PC6);
DDRB &= ~(1<<PB4);
PORTB |= (1<<PB4);
// Init I/O expander
expander_init();
}
#if !IMPROVED_DEBOUNCE
static matrix_row_t read_row(void)
{
return expander_read_row() |
(PIND&(1<<PD3) ? 0 : (1<<7)) |
(PIND&(1<<PD2) ? 0 : (1<<8)) |
(PIND&(1<<PD4) ? 0 : (1<<9)) |
(PINC&(1<<PC6) ? 0 : (1<<10)) |
(PIND&(1<<PD7) ? 0 : (1<<11)) |
(PINE&(1<<PE6) ? 0 : (1<<12)) |
(PINB&(1<<PB4) ? 0 : (1<<13));
}
#endif
static void read_cols(void)
{
expander_read_cols();
}
static uint8_t get_col(uint8_t col)
{
switch (col) {
#ifdef VER_PROTOTYPE
case 0 ... 6:
return expander_get_col(col);
case 7:
return PIND&(1<<PD3) ? 0 : 1;
case 8:
return PIND&(1<<PD2) ? 0 : 1;
case 9:
return PIND&(1<<PD4) ? 0 : 1;
case 10:
return PINC&(1<<PC6) ? 0 : 1;
case 11:
return PIND&(1<<PD7) ? 0 : 1;
case 12:
return PINE&(1<<PE6) ? 0 : 1;
case 13:
return PINB&(1<<PB4) ? 0 : 1;
#else
case 0:
return PINB&(1<<PB4) ? 0 : 1;
case 1:
return PINE&(1<<PE6) ? 0 : 1;
case 2:
return PIND&(1<<PD7) ? 0 : 1;
case 3:
return PINC&(1<<PC6) ? 0 : 1;
case 4:
return PIND&(1<<PD4) ? 0 : 1;
case 5:
return PIND&(1<<PD2) ? 0 : 1;
case 6:
return PIND&(1<<PD3) ? 0 : 1;
case 7 ... 13:
return expander_get_col(13 - col);
#endif
default:
return 0;
}
}
/* Row pin configuration
* row: 0 1 2 3 4 5
* pin: F4 F5 F6 F7 B1 B2
*/
static void unselect_rows(void)
{
// Hi-Z(DDR:0, PORT:0) to unselect
DDRF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
PORTF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
DDRB &= ~(1<<PB1 | 1<<PB2);
PORTB &= ~(1<<PB1 | 1<<PB2);
// I/O expander
expander_unselect_rows();
}
static void select_row(uint8_t row)
{
// Output low(DDR:1, PORT:0) to select
switch (row) {
case 0:
DDRF |= (1<<PF4);
PORTF &= ~(1<<PF4);
break;
case 1:
DDRF |= (1<<PF5);
PORTF &= ~(1<<PF5);
break;
case 2:
DDRF |= (1<<PF6);
PORTF &= ~(1<<PF6);
break;
case 3:
DDRF |= (1<<PF7);
PORTF &= ~(1<<PF7);
break;
case 4:
DDRB |= (1<<PB1);
PORTB &= ~(1<<PB1);
break;
case 5:
DDRB |= (1<<PB2);
PORTB &= ~(1<<PB2);
break;
}
// I/O expander
expander_select_row(row);
}