[ES] Blatt 1 und 2 hinzugefügt

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

es/blatt2/uebung2-1/uebung2-1.ino

@@ -0,0 +1,102 @@
+int ledPin = 7;
+int buttonPlusPin = 5;
+int buttonMinusPin = 3;
+int volatile counter = 0;
+int timesPressedPlus = 0;
+int timesPressedMinus = 0;
+int vergleichswert = 60;
+int rc = 10499;
+boolean increased = false;
+boolean decreased = false;
+
+void setup() {
+  // put your setup code here, to run once:
+
+  pmc_set_writeprotect(false);
+  pmc_enable_periph_clk(ID_TC0);
+
+  // Hier erfolgt die Konfiguration des Timers
+  TC_Configure(TC0, 0, TC_CMR_WAVE | TC_CMR_WAVSEL_UP_RC | TC_CMR_TCCLKS_TIMER_CLOCK2) ;
+  TC_SetRC(TC0, 0, rc);
+
+  TC0->TC_CHANNEL[0].TC_IER=TC_IER_CPCS;   // IER = interrupt enable register
+  TC0->TC_CHANNEL[0].TC_IDR=~TC_IER_CPCS;
+
+  NVIC_ClearPendingIRQ(TC0_IRQn);
+  NVIC_EnableIRQ(TC0_IRQn);
+
+  // Hier wird der konfigurierte Timer gestartet
+  TC_Start(TC0, 0);
+
+  // Hier werden die Taster konfiguriert
+  pinMode(buttonPlusPin, INPUT);
+  pinMode(buttonMinusPin, INPUT);
+
+  // Ausgabe über den seriellen Port
+  Serial.begin(9600);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  // Hier wird die Plus Taste abgefragt
+  analogWrite(ledPin, counter);
+  Serial.print("LED: ");
+  Serial.println(counter);
+}
+
+void increment() {
+  if (counter < 255) {
+    counter += 1;
+  }
+}
+
+void decrement() {
+  if (counter > 0)  {
+    counter -= 1;
+  }
+
+}
+
+void TC0_Handler()
+{
+  TC_GetStatus(TC0, 0);
+  boolean tasteGedruecktPlus = (digitalRead(buttonPlusPin) == LOW);
+  boolean tasteGedruecktMinus = (digitalRead(buttonMinusPin) == LOW);
+
+  if (tasteGedruecktPlus){
+    ++timesPressedPlus;
+  }
+  else {
+    if (increased) {
+      increased = false;
+    }
+    timesPressedPlus = 0 ;
+  }
+
+  if (tasteGedruecktMinus){
+    ++timesPressedMinus;
+  }
+  else {
+    if (decreased) {
+      decreased = false;
+    }
+    timesPressedMinus = 0 ;
+  }
+
+  if (timesPressedPlus >= vergleichswert) {
+    if (!increased) {
+      increment();
+    }
+    increased = true;
+    timesPressedPlus = 0;
+  }
+
+  // Hier wird die Minus Taste abgefragt
+  if (timesPressedMinus >= vergleichswert) {
+    if (!decreased) {
+      decrement();
+    }
+    decreased = true;
+    timesPressedMinus = 0;
+  }
+}