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