- /*
- 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 <string.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)
- # ifdef MATRIX_ROW_PINS
- static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
- # endif // MATRIX_ROW_PINS
- # ifdef MATRIX_COL_PINS
- static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
- # endif // 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
-
- // user-defined overridable functions
- __attribute__((weak)) void matrix_init_pins(void);
- __attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
- __attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
-
- 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
-
- __attribute__((weak)) void matrix_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);
- }
- }
- }
- }
-
- __attribute__((weak)) void matrix_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);
- }
- }
-
- // Update the matrix
- current_matrix[current_row] = current_row_value;
- }
-
- #elif defined(DIODE_DIRECTION)
- # if defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
- # 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]);
- }
- }
-
- __attribute__((weak)) void matrix_init_pins(void) {
- unselect_rows();
- for (uint8_t x = 0; x < MATRIX_COLS; x++) {
- setPinInputHigh_atomic(col_pins[x]);
- }
- }
-
- __attribute__((weak)) void matrix_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
- select_row(current_row);
- matrix_output_select_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);
- matrix_output_unselect_delay(); // wait for all Col signals to go HIGH
-
- // Update the matrix
- current_matrix[current_row] = current_row_value;
- }
-
- # 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]);
- }
- }
-
- __attribute__((weak)) void matrix_init_pins(void) {
- unselect_cols();
- for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
- setPinInputHigh_atomic(row_pins[x]);
- }
- }
-
- __attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
- // Select col
- select_col(current_col);
- matrix_output_select_delay();
-
- // For each row...
- for (uint8_t row_index = 0; row_index < MATRIX_ROWS; 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);
- } else {
- // Pin HI, clear col bit
- current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col);
- }
- }
-
- // Unselect col
- unselect_col(current_col);
- matrix_output_unselect_delay(); // wait for all Row signals to go HIGH
- }
-
- # else
- # error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
- # endif
- # endif // defined(MATRIX_ROW_PINS) && defined(MATRIX_COL_PINS)
- #else
- # error DIODE_DIRECTION is not defined!
- #endif
-
- void matrix_init(void) {
- // initialize key pins
- matrix_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) {
- matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
-
- #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
- // Set row, read cols
- for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
- matrix_read_cols_on_row(curr_matrix, current_row);
- }
- #elif (DIODE_DIRECTION == ROW2COL)
- // Set col, read rows
- for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
- matrix_read_rows_on_col(curr_matrix, current_col);
- }
- #endif
-
- bool changed = memcmp(raw_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
- if (changed) memcpy(raw_matrix, curr_matrix, sizeof(curr_matrix));
-
- debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
-
- matrix_scan_quantum();
- return (uint8_t)changed;
- }
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