285 lines
6.7 KiB
C
285 lines
6.7 KiB
C
/*
|
|
Copyright 2018 listofoptions <listofoptions@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 <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#if defined(__AVR__)
|
|
#include <avr/io.h>
|
|
#endif
|
|
#include <util/delay.h>
|
|
|
|
#include "wait.h"
|
|
#include "print.h"
|
|
#include "debug.h"
|
|
#include "util.h"
|
|
#include "matrix.h"
|
|
#include "timer.h"
|
|
|
|
#include "config.h"
|
|
|
|
|
|
#ifndef DEBOUNCING_DELAY
|
|
# define DEBOUNCING_DELAY 5
|
|
#endif
|
|
|
|
#define print_matrix_header() print("\nr/c 01234567\n")
|
|
#define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
|
|
#define matrix_bitpop(i) bitpop(matrix[i])
|
|
#define ROW_SHIFTER ((uint8_t)1)
|
|
#define check_bit(var,pos) ((var) & (1<<(pos)))
|
|
|
|
#define NUM_ROW_PINS 5
|
|
#define NUM_COL_PINS 2
|
|
|
|
static const uint8_t row_pins [NUM_ROW_PINS] = MATRIX_ROW_PINS ;
|
|
static const uint8_t col_pins [NUM_ROW_PINS] = MATRIX_COL_PINS ;
|
|
|
|
#if ( DEBOUNCING_DELAY > 0 )
|
|
static uint16_t debouncing_time ;
|
|
static bool debouncing = false ;
|
|
#endif
|
|
|
|
static uint8_t matrix [MATRIX_ROWS] = {0};
|
|
|
|
#if ( DEBOUNCING_DELAY > 0 )
|
|
static uint8_t matrix_debounce [MATRIX_ROWS] = {0};
|
|
#endif
|
|
|
|
static
|
|
inline
|
|
void toggle_led(void) {
|
|
uint8_t pin = LED_PIN ;
|
|
_SFR_IO8((pin >> 4) + 2) ^= _BV(pin & 0xF);
|
|
}
|
|
|
|
static
|
|
inline
|
|
void init_led(void) {
|
|
uint8_t pin = LED_PIN ;
|
|
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
}
|
|
|
|
static
|
|
inline
|
|
void init_data(void) {
|
|
uint8_t pin = MATRIX_DATA_PIN ;
|
|
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
|
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // LO
|
|
}
|
|
|
|
static
|
|
inline
|
|
void init_strobe(void) {
|
|
uint8_t pin = MATRIX_STROBE_PIN ;
|
|
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
|
}
|
|
|
|
static
|
|
inline
|
|
void init_rows(void) {
|
|
for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) {
|
|
uint8_t pin = row_pins[i];
|
|
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
}
|
|
}
|
|
|
|
static
|
|
inline
|
|
void init_cols(void) {
|
|
for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) {
|
|
uint8_t pin = col_pins[i];
|
|
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
|
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
}
|
|
}
|
|
|
|
static
|
|
inline
|
|
void select_row(uint8_t current_row) {
|
|
for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) {
|
|
uint8_t pin = row_pins[i] ;
|
|
if ( check_bit( current_row, i ) ) {
|
|
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
|
} else {
|
|
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
}
|
|
}
|
|
wait_us(30) ;
|
|
}
|
|
|
|
static
|
|
inline
|
|
void select_col(uint8_t current_col) {
|
|
for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) {
|
|
uint8_t pin = col_pins[i] ;
|
|
if ( check_bit( current_col, i ) ) {
|
|
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
|
} else {
|
|
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
|
}
|
|
}
|
|
wait_us(30) ;
|
|
}
|
|
|
|
static
|
|
inline
|
|
uint8_t matrix_strobe(uint8_t col_index) {
|
|
uint8_t strobe_pin = MATRIX_STROBE_PIN ;
|
|
uint8_t data_pin = MATRIX_DATA_PIN ;
|
|
|
|
// set strobe pin low
|
|
_SFR_IO8((strobe_pin >> 4) + 2) &= ~_BV(strobe_pin & 0xF);
|
|
|
|
wait_us(30) ;
|
|
|
|
// read data
|
|
uint8_t data = (_SFR_IO8(data_pin >> 4) & _BV(data_pin & 0xF)) ;
|
|
|
|
// set strobe pin hi
|
|
_SFR_IO8((strobe_pin >> 4) + 2) |= _BV(strobe_pin & 0xF);
|
|
|
|
uint8_t out = data ? (1 << col_index) : 0 ;
|
|
return out ;
|
|
}
|
|
|
|
static
|
|
bool matrix_read(uint8_t current_matrix[], uint8_t current_row) {
|
|
// Store last value of row prior to reading
|
|
uint8_t last_row_value = current_matrix[current_row];
|
|
|
|
// Clear data in matrix row
|
|
current_matrix[current_row] = 0;
|
|
|
|
select_row(current_row);
|
|
|
|
// For each col...
|
|
for(uint8_t col_index = 0; col_index < MATRIX_COLS; ++col_index) {
|
|
|
|
select_col(col_index) ;
|
|
|
|
// strobe the matrix
|
|
// Populate the matrix row with the state of the data pin
|
|
current_matrix[current_row] |= matrix_strobe(col_index) ;
|
|
}
|
|
|
|
bool test = last_row_value != current_matrix[current_row] ;
|
|
return test ;
|
|
}
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_init_quantum(void) {
|
|
matrix_init_kb();
|
|
}
|
|
|
|
__attribute__ ((weak))
|
|
void matrix_scan_quantum(void) {
|
|
matrix_scan_kb();
|
|
}
|
|
|
|
__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) {
|
|
}
|
|
|
|
inline
|
|
uint8_t matrix_rows(void) {
|
|
return MATRIX_ROWS;
|
|
}
|
|
|
|
inline
|
|
uint8_t matrix_cols(void) {
|
|
return MATRIX_COLS;
|
|
}
|
|
|
|
inline
|
|
uint8_t matrix_get_row(uint8_t row) {
|
|
return matrix[row];
|
|
}
|
|
|
|
void matrix_init(void) {
|
|
init_led() ;
|
|
init_rows() ;
|
|
init_cols() ;
|
|
init_data() ;
|
|
init_strobe() ;
|
|
|
|
// initialize matrix state: all keys off
|
|
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = 0;
|
|
# if (DEBOUNCING_DELAY > 0)
|
|
matrix_debounce [i] = 0;
|
|
# endif
|
|
}
|
|
|
|
matrix_init_quantum() ;
|
|
}
|
|
|
|
uint8_t matrix_scan(void) {
|
|
for ( uint8_t current_row = 0; current_row < MATRIX_ROWS; ++current_row ) {
|
|
# if (DEBOUNCING_DELAY > 0)
|
|
bool matrix_changed = matrix_read(matrix_debounce, current_row);
|
|
|
|
if (matrix_changed) {
|
|
debouncing = true ;
|
|
debouncing_time = timer_read();
|
|
}
|
|
|
|
# else
|
|
matrix_read(matrix, current_row);
|
|
# endif
|
|
}
|
|
|
|
# if (DEBOUNCING_DELAY > 0)
|
|
if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
|
|
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
|
|
matrix[i] = matrix_debounce[i];
|
|
}
|
|
debouncing = false;
|
|
}
|
|
# endif
|
|
|
|
matrix_scan_quantum();
|
|
return 1;
|
|
}
|
|
|
|
void matrix_print(void) {
|
|
print_matrix_header();
|
|
|
|
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
|
phex(row); print(": ");
|
|
print_matrix_row(row);
|
|
print("\n");
|
|
}
|
|
}
|