/* Copyright 2021 xyzz * * 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 "util.h" #include "matrix.h" #include "debounce.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; static void select_col(uint8_t col) { setPinOutput(col_pins[col]); writePinHigh(col_pins[col]); } static void unselect_col(uint8_t col) { setPinInputLow(col_pins[col]); } static void unselect_cols(void) { for (uint8_t x = 0; x < MATRIX_COLS; x++) { setPinInputLow(col_pins[x]); } } static void init_pins(void) { unselect_cols(); for (uint8_t x = 0; x < MATRIX_ROWS; x++) { setPinInputLow(row_pins[x]); } } 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); matrix_io_delay(); // For each row... for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) { // Store last value of row prior to reading matrix_row_t last_row_value = current_matrix[row_index]; matrix_row_t current_row_value = last_row_value; // Check row pin state if (readPin(row_pins[row_index]) != 0) { // Pin LO, set col bit current_row_value |= (MATRIX_ROW_SHIFTER << current_col); } else { // Pin HI, clear col bit current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col); } // Determine if the matrix changed state if ((last_row_value != current_row_value)) { matrix_changed |= true; current_matrix[row_index] = current_row_value; } } // Unselect col unselect_col(current_col); return matrix_changed; } void matrix_init_custom(void) { // initialize key pins init_pins(); } uint8_t matrix_scan_custom(matrix_row_t current_matrix[]) { bool changed = false; // Set col, read rows for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { changed |= read_rows_on_col(current_matrix, current_col); } return (uint8_t)changed; }