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/*
Copyright 2021 talsu <talsu84@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 "wait.h"
#include "matrix.h"
#include "quantum.h"
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
/* Columns 0 - 3
* col / pin:
* 0: C7
* 1: C6
* 2: B6
* 3: B5
*/
static void unselect_cols(void) {
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
setPinOutput(col_pins[col]);
writePinLow(col_pins[col]);
}
}
static void select_col(uint8_t col) {
writePinHigh(col_pins[col]);
}
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
select_col(current_col);
wait_us(30);
// row:0 , col:0 FN key is DIRECT_PIN
if (current_col == 0) {
matrix_row_t last_row_value = current_matrix[0];
if (readPin(row_pins[0]) == 0) {
// Pin LO, set col bit
current_matrix[0] |= (1 << current_col);
} else {
// Pin HI, clear col bit
current_matrix[0] &= ~(1 << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[0]) && !(matrix_changed)) {
matrix_changed = true;
}
}
// other row use MATRIX
for (uint8_t row_index = 1; row_index < MATRIX_ROWS; row_index++) {
matrix_row_t last_row_value = current_matrix[row_index];
if (readPin(row_pins[row_index]) == 0) {
// Pin HI, clear col bit
current_matrix[row_index] &= ~(1 << current_col);
} else {
// Pin LO, set col bit
current_matrix[row_index] |= (1 << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) {
matrix_changed = true;
}
}
// Unselect cols
unselect_cols();
return matrix_changed;
}
void matrix_init_custom(void) {
// initialize hardware and global matrix state here
unselect_cols();
// initialize key pins
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
setPinInputHigh(row_pins[row_index]);
}
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
changed |= read_rows_on_col(current_matrix, current_col);
}
return changed;
}
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