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75 lines
2.2 KiB
75 lines
2.2 KiB
/*
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* Copyright 2018-2023 Jack Humbert <jack.humb@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "quantum.h"
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/* matrix state(1:on, 0:off) */
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static pin_t matrix_row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static pin_t matrix_col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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static matrix_row_t matrix_inverted[MATRIX_COLS];
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void matrix_init_custom(void) {
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// actual matrix setup - cols
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for (int i = 0; i < MATRIX_COLS; i++) {
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setPinOutput(matrix_col_pins[i]);
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writePinLow(matrix_col_pins[i]);
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}
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// rows
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for (int i = 0; i < MATRIX_ROWS; i++) {
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setPinInputLow(matrix_row_pins[i]);
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}
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}
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bool matrix_scan_custom(matrix_row_t current_matrix[]) {
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bool changed = false;
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// actual matrix
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for (int col = 0; col < MATRIX_COLS; col++) {
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matrix_row_t data = 0;
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// strobe col
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writePinHigh(matrix_col_pins[col]);
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// need wait to settle pin state
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wait_us(20);
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// read row data
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for (int row = 0; row < MATRIX_ROWS; row++) {
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data |= (gpio_read_pin(matrix_row_pins[row]) << row);
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}
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// unstrobe col
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writePinLow(matrix_col_pins[col]);
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if (matrix_inverted[col] != data) {
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matrix_inverted[col] = data;
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}
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}
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for (int row = 0; row < MATRIX_ROWS; row++) {
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matrix_row_t old = current_matrix[row];
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current_matrix[row] = 0;
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for (int col = 0; col < MATRIX_COLS; col++) {
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current_matrix[row] |= ((matrix_inverted[col] & (1 << row) ? 1 : 0) << col);
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}
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changed |= old != current_matrix[row];
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}
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return changed;
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}
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