[ES] Blatt 1 und 2 hinzugefügt

Signed-off-by: Jim Martens <github@2martens.de>

es/blatt1/uebung1-13/uebung1-13.ino

@@ -0,0 +1,37 @@
+int ledPin = 7;
+int buttonPin = 5;
+int buttonState;
+bool volatile ledState = true;
+bool volatile performDelay = false;
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(ledPin, OUTPUT);
+  pinMode(buttonPin, INPUT);
+  attachInterrupt(buttonPin, buttonChanged, RISING);
+  digitalWrite(ledPin, LOW);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  buttonState = digitalRead(buttonPin);
+  if (performDelay) {
+    detachInterrupt(buttonPin);
+    delay(20);
+    performDelay = false;
+    attachInterrupt(buttonPin, buttonChanged, RISING);
+  
+    if (buttonState == HIGH) {
+      if (ledState) {
+        digitalWrite(ledPin, LOW);
+      } else {
+        digitalWrite(ledPin, HIGH);
+      }
+      ledState = !ledState;
+    } 
+  }
+}
+
+void buttonChanged()  {
+  performDelay = true;
+}