/* Copyright 2012-2020 Jun Wako, Jack Humbert, Yiancar, Ein Terakawa, Drashna, Josh Hinnebusch 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_ROW_PINS; static const pin_t col_pins[] = MATRIX_COL_PINS; /* matrix state(1:on, 0:off) */ static matrix_row_t last_matrix[MATRIX_ROWS]; // raw values of last scan // matrix code void select_row(uint8_t row) { setPinOutput(row_pins[row]); writePinLow(row_pins[row]); } void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); } bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { // Store last value of row prior to reading matrix_row_t last_row_value = current_matrix[current_row]; // Clear data in matrix row current_matrix[current_row] = 0; // Select row and wait for row selecton to stabilize select_row(current_row); matrix_io_delay(); // For each col... for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) { // Select the col pin to read (active low) uint8_t pin_state = readPin(col_pins[col_index]); // Populate the matrix row with the state of the col pin current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index); } // Unselect row unselect_row(current_row); return (last_row_value != current_matrix[current_row]); } void select_col(uint8_t col) { setPinOutput(col_pins[col]); writePinLow(col_pins[col]); } void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); } 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]; // Check row pin state if (readPin(row_pins[row_index]) == 0) { // Pin LO, set col bit current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col); } // Determine if the matrix changed state if ((last_row_value != current_matrix[row_index]) && !(matrix_changed)) { matrix_changed = true; } } // Unselect col unselect_col(current_col); return matrix_changed; } void unselect_rows(void) { for (uint8_t x = 0; x < MATRIX_ROWS; x++) { setPinInputHigh(row_pins[x]); } } void unselect_cols(void) { for (uint8_t x = 0; x < MATRIX_COLS; x++) { setPinInputHigh(col_pins[x]); } } void init_pins(void) { unselect_rows(); unselect_cols(); } void matrix_init_custom(void) { // initialize key pins init_pins(); } bool matrix_scan_custom(matrix_row_t current_matrix[]) { bool changed = false; for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { last_matrix[current_row] = current_matrix[current_row]; read_cols_on_row(current_matrix, current_row); } for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { read_rows_on_col(current_matrix, current_col); } for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { if (last_matrix[current_row] != current_matrix[current_row]) { changed = true; } } return (uint8_t)changed; }