Innleveringsoppgave Januar 2019:

Oppgave 8: Basic trafikklys
2019-01-24 14:15:14 +01:00 · 2019-01-24 14:15:14 +01:00 · 0b30e79d4a
commit 0b30e79d4a
parent e7ce4cff5c
1 changed files with 135 additions and 0 deletions
--- a/Sketches/sketch_jan10a-ArduinoInnlevering/sketch_jan10a-ArduinoInnlevering.ino
+++ b/Sketches/sketch_jan10a-ArduinoInnlevering/sketch_jan10a-ArduinoInnlevering.ino
@ -0,0 +1,135 @@
+// "ped" = Pedestrian
+// Fotgjengerlys og bryter.
+int pedGreen = 6;
+int pedRed = 7;
+int pedSwitch = 11;
+
+// Trafikklys
+int trafficRed = 8;
+int trafficYellow = 9;
+int trafficGreen = 10;
+
+void setup() {
+    // Pins som skal være output, brukes bare i setup.
+    int outputPins[] = {
+        pedGreen,
+        pedRed,
+
+        trafficGreen,
+        trafficRed,
+        trafficYellow
+    };
+
+    // Antall output pins for LED
+    int outputCount = sizeof(outputPins) / sizeof(int);
+    // Sett alle output pins til å være output.
+    for(int i = 0; i < outputCount; i++)
+    {
+        pinMode(outputPins[i], OUTPUT);
+    }
+
+    pinMode(pedSwitch, INPUT_PULLUP);
+}
+
+/**
+ * Lengde på hvor lenge hvert trafikklys, i millisekunder.
+ */
+int redLength = 5000;
+int redYellowLength = 2000;
+int greenLength = 10000;
+int yellowLength = 2000;
+
+/**
+ * Trafficstates er:
+ * - 0: Rødt lys (5 sek)
+ * - 1: Rødt + gult (2 sek)
+ * - 2: Grønt (10 sek)
+ * - 3: Gult (2 sek)
+ */
+int trafficState = -1;
+int redState = 0;
+int redYellowState = 1;
+int greenState = 2;
+int yellowState = 3;
+
+/**
+ * Lengder som kan refereres basert på array index
+ * Array index vil være det samme som "trafficState"
+ */
+int trafficLightLengths[] = {
+    // redState
+    redLength,
+    // redYellowState
+    redYellowLength,
+    // greenState
+    greenLength,
+    // yellowState
+    yellowLength
+};
+
+/**
+ * Antall millisekunder siden "trafficState" var sist endret.
+ */
+unsigned long lastStateChange = millis();
+
+void loop() {
+    unsigned long currentTime = millis();
+
+    /**
+     * Starte med rødt lys.
+     * Denne "staten" vil bare være ved oppstart.
+     */
+    if (trafficState == -1) {
+        digitalWrite(trafficRed, HIGH);
+        lastStateChange = currentTime;
+        trafficState = 0;
+
+        return;
+    }
+
+    int lightLength = trafficLightLengths[trafficState];
+    if (currentTime - lastStateChange >= lightLength)
+    {
+        trafficState++;
+        lastStateChange = currentTime;
+
+        /**
+             * Trafikklys er ferdig med syklus, gå tilbake til rødt.
+             */
+        if (trafficState > 3)
+        {
+            trafficState = 0;
+        }
+
+        switch (trafficState)
+        {
+            // Rødt lys
+            case 0:
+                digitalWrite(trafficRed, HIGH);
+                digitalWrite(trafficYellow, LOW);
+                digitalWrite(trafficGreen, LOW);
+                break;
+
+            // Rødt + gult lys
+            case 1:
+                digitalWrite(trafficRed, HIGH);
+                digitalWrite(trafficYellow, HIGH);
+                digitalWrite(trafficGreen, LOW);
+                break;
+
+            // Grønt lys
+            case 2:
+                digitalWrite(trafficRed, LOW);
+                digitalWrite(trafficYellow, LOW);
+                digitalWrite(trafficGreen, HIGH);
+                break;
+
+            // Gult lys
+            case 3:
+                digitalWrite(trafficRed, LOW);
+                digitalWrite(trafficYellow, HIGH);
+                digitalWrite(trafficGreen, LOW);
+                break;
+        }
+    }
+}