[Keyboard] Add QVEX Lynepad 2.0 (#21070)

keyboards/qvex/lynepad2/matrix.c

@@ -0,0 +1,119 @@
+/*
+Copyright 2023 QVEX Tech
+
+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"
+
+static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+
+extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];     // debounced values
+
+static void select_row(uint8_t row) {
+    setPinOutput(row_pins[row]);
+    writePinLow(row_pins[row]);
+}
+
+static void unselect_row(uint8_t row) {
+    setPinInputHigh(row_pins[row]);
+}
+
+static void unselect_rows(void) {
+    for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
+        setPinInputHigh(row_pins[x]);
+    }
+}
+
+static void init_pins(void) {
+    unselect_rows();
+    for (uint8_t x = 0; x < MATRIX_COLS; x++) {
+        setPinInputHigh(col_pins[x]);
+    }
+    setPinInputHigh(PIN_JU);
+    setPinInputHigh(PIN_JD);
+    setPinInputHigh(PIN_JL);
+    setPinInputHigh(PIN_JR);
+    setPinInputHigh(PIN_JC);
+    setPinInputHigh(PIN_TC);
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
+    if (current_row > 2) return false;
+
+    matrix_row_t last_row_value = current_matrix[current_row];
+
+    current_matrix[current_row] = 0;
+
+    select_row(current_row);
+    wait_us(30);
+
+    for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+        uint8_t pin_state = readPin(col_pins[col_index]);
+        current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
+    }
+
+    unselect_row(current_row);
+
+    return (last_row_value != current_matrix[current_row]);
+}
+
+static bool read_encoder_switches(matrix_row_t current_matrix[]) {
+    matrix_row_t last_fourth_row = current_matrix[3];
+    matrix_row_t last_fifth_row  = current_matrix[4];
+
+    current_matrix[3] = 0;
+    current_matrix[4] = 0;
+
+    current_matrix[4] |= !readPin(PIN_TC) ? (1 << 1) : 0;
+
+    if (!readPin(PIN_JC)) {
+        if (!readPin(PIN_JU)) {
+            current_matrix[3] |= (1 << 0);
+        } else if (!readPin(PIN_JD)) {
+            current_matrix[3] |= (1 << 1);
+        } else if (!readPin(PIN_JL)) {
+            current_matrix[3] |= (1 << 2);
+        } else if (!readPin(PIN_JR)) {
+            current_matrix[3] |= (1 << 3);
+        } else {
+            current_matrix[4] |= (1 << 0);
+        }
+    }
+
+    return last_fourth_row != current_matrix[3] || last_fifth_row != current_matrix[4];
+}
+
+void matrix_init_custom(void) {
+    init_pins();
+}
+
+bool matrix_scan_custom(void) {
+    bool changed = false;
+
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+        changed |= read_cols_on_row(raw_matrix, current_row);
+    }
+
+    changed |= read_encoder_switches(raw_matrix);
+
+    return changed;
+}