/* Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar 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" #ifdef DIRECT_PINS static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS; #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW) static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; #endif /* matrix state(1:on, 0:off) */ extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values static inline void setPinOutput_writeLow(pin_t pin) { ATOMIC_BLOCK_FORCEON { setPinOutput(pin); writePinLow(pin); } } static inline void setPinInputHigh_atomic(pin_t pin) { ATOMIC_BLOCK_FORCEON { setPinInputHigh(pin); } } // matrix code #ifdef DIRECT_PINS static void init_pins(void) { for (int row = 0; row < MATRIX_ROWS; row++) { for (int col = 0; col < MATRIX_COLS; col++) { pin_t pin = direct_pins[row][col]; if (pin != NO_PIN) { setPinInputHigh(pin); } } } } static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { // Start with a clear matrix row matrix_row_t current_row_value = 0; for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) { pin_t pin = direct_pins[current_row][col_index]; if (pin != NO_PIN) { current_row_value |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index); } } // If the row has changed, store the row and return the changed flag. if (current_matrix[current_row] != current_row_value) { current_matrix[current_row] = current_row_value; return true; } return false; } #elif defined(DIODE_DIRECTION) # if (DIODE_DIRECTION == COL2ROW) static void select_row(uint8_t row) { setPinOutput_writeLow(row_pins[row]); } static void unselect_row(uint8_t row) { setPinInputHigh_atomic(row_pins[row]); } static void unselect_rows(void) { for (uint8_t x = 0; x < MATRIX_ROWS; x++) { setPinInputHigh_atomic(row_pins[x]); } } static void init_pins(void) { unselect_rows(); for (uint8_t x = 0; x < MATRIX_COLS; x++) { setPinInputHigh_atomic(col_pins[x]); } } static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) { // Start with a clear matrix row matrix_row_t current_row_value = 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_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index); } // Unselect row unselect_row(current_row); // If the row has changed, store the row and return the changed flag. if (current_matrix[current_row] != current_row_value) { current_matrix[current_row] = current_row_value; return true; } return false; } # elif (DIODE_DIRECTION == ROW2COL) static void select_col(uint8_t col) { setPinOutput_writeLow(col_pins[col]); } static void unselect_col(uint8_t col) { setPinInputHigh_atomic(col_pins[col]); } static void unselect_cols(void) { for (uint8_t x = 0; x < MATRIX_COLS; x++) { setPinInputHigh_atomic(col_pins[x]); } } static void init_pins(void) { unselect_cols(); for (uint8_t x = 0; x < MATRIX_ROWS; x++) { setPinInputHigh_atomic(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; } # else # error DIODE_DIRECTION must be one of COL2ROW or ROW2COL! # endif #else # error DIODE_DIRECTION is not defined! #endif void matrix_init(void) { // initialize key pins init_pins(); // initialize matrix state: all keys off for (uint8_t i = 0; i < MATRIX_ROWS; i++) { raw_matrix[i] = 0; matrix[i] = 0; } debounce_init(MATRIX_ROWS); matrix_init_quantum(); } uint8_t matrix_scan(void) { bool changed = false; #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW) // Set row, read cols for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) { changed |= read_cols_on_row(raw_matrix, current_row); } #elif (DIODE_DIRECTION == ROW2COL) // Set col, read rows for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { changed |= read_rows_on_col(raw_matrix, current_col); } #endif debounce(raw_matrix, matrix, MATRIX_ROWS, changed); matrix_scan_quantum(); return (uint8_t)changed; }