Kood

Arduino kood

+const int rowPins[2] = {9, 10};
+const int colPins[2] = {11, 12};
+const int rows[2] = {4, 3};
+const int cols[2] = {6, 5};
+
+const int numRows = 2;
+const int numCols = 2;
+const int rowCount = 2;
+const int colCount = 2;
+
+const int debounceInterval = 50;
+
+unsigned long lastDebounceTime = 0;
+
+int lastButtonStates[2][2] = {HIGH, HIGH, HIGH, HIGH}; 
+
+byte keys[colCount][rowCount];
+
+int LedStates[numRows][numCols] = {1, 1, 1, 1};
+
+void setup() {
+  Serial.begin(115200);
+
+  for (int x = 0; x < rowCount; x++) {
+    Serial.print(rows[x]);
+    Serial.println(" as input");
+    pinMode(rows[x], INPUT);
+  }
+
+  for (int x = 0; x < colCount; x++) {
+    Serial.print(cols[x]);
+    Serial.println(" as input-pullup");
+    pinMode(cols[x], INPUT_PULLUP);
+  }
+
+  for (int i = 0; i < numRows; i++) {
+    pinMode(rowPins[i], OUTPUT);
+  }
+  for (int j = 0; j < numCols; j++) {
+    pinMode(colPins[j], OUTPUT);
+  }
+}
+
+void readMatrix() {
+  unsigned long currentMillis = millis();
+
+  for (int colIndex = 0; colIndex < colCount; colIndex++) {
+    byte curCol = cols[colIndex];
+    pinMode(curCol, OUTPUT);
+    digitalWrite(curCol, LOW);
+
+    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) {
+      byte rowCol = rows[rowIndex];
+      pinMode(rowCol, INPUT_PULLUP);
+
+      int buttonState = digitalRead(rowCol);
+
+      if (buttonState == LOW && lastButtonStates[colIndex][rowIndex] == HIGH &&
+          currentMillis - lastDebounceTime > debounceInterval) {
+        LedStates[colIndex][rowIndex] = !LedStates[colIndex][rowIndex];
+        lastDebounceTime = currentMillis;
+      }
+
+      lastButtonStates[colIndex][rowIndex] = buttonState;
+
+      pinMode(rowCol, INPUT);
+    }
+    pinMode(curCol, INPUT);
+  }
+}
+
+void printMatrix() {
+  for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) {
+    if (rowIndex < 10)
+      Serial.print(F("0"));
+    Serial.print(rowIndex);
+    Serial.print(F(": "));
+
+    for (int colIndex = 0; colIndex < colCount; colIndex++) {
+      Serial.print(keys[colIndex][rowIndex]);
+      if (colIndex < colCount)
+        Serial.print(F(", "));
+    }
+    Serial.println("");
+  }
+  Serial.println("");
+}
+
+void manageLed() {
+  for (int row = 0; row < numRows; row++) {
+    for (int col = 0; col < numCols; col++) {
+
+      for (int r = 0; r < numRows; r++) {
+        digitalWrite(rowPins[r], LOW);
+      }
+      for (int c = 0; c < numCols; c++) {
+        digitalWrite(colPins[c], LOW);
+      }
+
+      if (LedStates[row][col] == 0) {
+        digitalWrite(rowPins[row], HIGH);
+        digitalWrite(colPins[col], HIGH);
+      }
+
+      delay(1); 
+    }
+  }
+}
+
+void loop() {
+    readMatrix();
+  if (Serial.available() > 0) {
+    char inputChar = Serial.read();
+    if (inputChar == '!') {
+      printMatrix();
+    }
+  }
+  manageLed();
+}
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