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+/*
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+Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
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+
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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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+
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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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+
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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 <stdint.h>
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+#include <stdbool.h>
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+#include "wait.h"
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+#include "util.h"
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+#include "matrix.h"
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+#include "quantum.h"
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+
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+// Encoder things
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+#define ENC_SW F7
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+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row);
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+
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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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+
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+/* matrix state(1:on, 0:off) */
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+extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
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+extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
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+
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+
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+static void select_row(uint8_t row) {
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+ setPinOutput(row_pins[row]);
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+ writePinLow(row_pins[row]);
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+}
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+
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+static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
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+
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+static void unselect_rows(void) {
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+ for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
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+ setPinInputHigh(row_pins[x]);
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+ }
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+}
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+
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+static void init_pins(void) {
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+ unselect_rows();
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+ for (uint8_t x = 0; x < MATRIX_COLS; x++) {
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+ setPinInputHigh(col_pins[x]);
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+ }
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+}
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+
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+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
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+ // Store last value of row prior to reading
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+ matrix_row_t last_row_value = current_matrix[current_row];
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+
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+ // Clear data in matrix row
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+ current_matrix[current_row] = 0;
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+
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+ // Select row and wait for row selecton to stabilize
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+ select_row(current_row);
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+ wait_us(30);
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+
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+ // For each col...
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+ for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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+ // Select the col pin to read (active low)
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+ uint8_t pin_state = readPin(col_pins[col_index]);
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+
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+ // Populate the matrix row with the state of the col pin
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+ current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
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+ }
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+
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+ // Unselect row
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+ unselect_row(current_row);
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+
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+ return (last_row_value != current_matrix[current_row]);
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+}
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+
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+
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+void matrix_init_custom(void) {
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+ // initialize key pins
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+ setPinInput(ENC_SW);
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+ init_pins();
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+}
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+
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+bool matrix_scan_custom(void) {
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+ bool changed = false;
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+
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+ // Set row, read cols
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+ for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
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+ changed |= read_cols_on_row(raw_matrix, current_row);
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+ }
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+
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+ // Read encoder switches, already debounced
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+ changed |= read_encoder_switches(matrix, 2);
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+
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+ return changed;
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+}
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+
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+static bool read_encoder_switches(matrix_row_t current_matrix[], uint8_t current_row) {
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+ // Store last value of row prior to reading
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+ matrix_row_t last_row_value = current_matrix[current_row];
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+
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+ // Clear data in matrix row
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+ current_matrix[current_row] = 0;
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+
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+ // Debounce the encoder buttons using a shift register
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+ static uint8_t btn_1_array;
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+ bool btn_1_pressed = 0;
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+ btn_1_array <<= 1;
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+ btn_1_array |= readPin(ENC_SW);
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+ (btn_1_array == 0b11111111) ? (btn_1_pressed = 1) : (btn_1_pressed = 0);
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+
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+ // Populate the matrix row with the state of the encoder
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+ current_matrix[current_row] |= btn_1_pressed ? (1 << 0) : 0;
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+
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+ return (last_row_value != current_matrix[current_row]);
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+}
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mexsistor