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/*
Copyright 2021 Dimitris Mantzouranis <d3xter93@gmail.com>
Copyright 2021 Adam Honse <calcprogrammer1@gmail.com>
Copyright 2011 Jun Wako <wakojun@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/>.
Ported to QMK by Stephen Peery <https://github.com/smp4488/>
*/
#include <stdint.h>
#include <stdbool.h>
#include "ch.h"
#include "hal.h"
#include "wait.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include "quantum.h"
#include "sn32f24xb.h"
#if defined(OPTICAL_MATRIX)
#ifndef PRESSED_KEY_PIN_STATE
# define PRESSED_KEY_PIN_STATE 1
#endif
#endif
#ifndef PRESSED_KEY_PIN_STATE
# define PRESSED_KEY_PIN_STATE 0
#endif
#ifndef MATRIX_KEY_SAMPLE_DELAY
# define MATRIX_KEY_SAMPLE_DELAY 100
#endif
#if defined(MATRIX_KEY_SAMPLE_DELAY)
void sample_delay(void){
//should give 2000/48000000Mhz = 42us delay
//we want 42 micro thus to get value
for (int i = 0; i < MATRIX_KEY_SAMPLE_DELAY; ++i) {
__asm__ volatile("" ::: "memory");
}
//wait_us(73); //does not work
}
#endif
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
matrix_row_t raw_matrix[MATRIX_ROWS]; //raw values
matrix_row_t last_matrix[MATRIX_ROWS] = {0}; // raw values
matrix_row_t matrix[MATRIX_ROWS]; //debounced values
static bool matrix_changed = false;
__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 matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
void matrix_print(void) {}
static void init_pins(void) {
#if(DIODE_DIRECTION == ROW2COL)
// Unselect ROWs
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
setPinInputHigh(row_pins[x]);
}
#elif(DIODE_DIRECTION == COL2ROW)
// Unselect COLs
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
setPinInputHigh(col_pins[x]);
}
#else
#error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
#endif
}
void matrix_scan_select(uint8_t current){
#if(DIODE_DIRECTION == ROW2COL)
// Select COL
setPinOutput(col_pins[current]);
writePinLow(col_pins[current]);
#elif(DIODE_DIRECTION == COL2ROW)
// Select ROW
setPinOutput(row_pins[current]);
writePinLow(row_pins[current]);
#endif
}
void matrix_scan_unselect(uint8_t current) {
#if(DIODE_DIRECTION == ROW2COL)
// Select COL
setPinInputHigh(col_pins[current]);
#elif(DIODE_DIRECTION == COL2ROW)
// Select ROW
setPinInputHigh(row_pins[current]);
#endif
}
void matrix_init(void) {
// initialize key pins
init_pins();
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
raw_matrix[i] = 0;
matrix[i] = 0;
}
debounce_init(MATRIX_ROWS);
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
matrix_changed = false;
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Determine if the matrix changed state
if ((last_matrix[row_index] != raw_matrix[row_index])) {
matrix_changed = true;
last_matrix[row_index] = raw_matrix[row_index];
}
}
}
debounce(raw_matrix, matrix, MATRIX_ROWS, matrix_changed);
matrix_scan_quantum();
return matrix_changed;
}
void matrix_scan_keys(matrix_row_t raw_matrix[], uint8_t current){
#if(DIODE_DIRECTION == ROW2COL)
// Read the key matrix rows on col
uint8_t col_index = current;
// Enable the column
matrix_scan_select(col_index);
sample_delay();
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Check row pin state
if (readPin(row_pins[row_index]) == PRESSED_KEY_PIN_STATE) {
// Pin LO, set col bit
raw_matrix[row_index] |= (MATRIX_ROW_SHIFTER << col_index);
} else {
// Pin HI, clear col bit
raw_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << col_index);
}
}
// Disable the column
matrix_scan_unselect(col_index);
//see https://github.com/SonixQMK/qmk_firmware/issues/157
sample_delay();
#elif(DIODE_DIRECTION == COL2ROW)
// Read the key matrix cols on row
uint8_t row_index = current;
// Enable the row
matrix_scan_select(row_index);
sample_delay();
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
// Check row pin state
if (readPin(col_pins[col_index]) == PRESSED_KEY_PIN_STATE) {
// Pin LO, set col bit
raw_matrix[row_index] |= (MATRIX_ROW_SHIFTER << col_index);
} else {
// Pin HI, clear col bit
raw_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << col_index);
}
}
// Disable the row
matrix_scan_unselect(row_index);
//see https://github.com/SonixQMK/qmk_firmware/issues/157
sample_delay();
#endif
}
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