Add a concept arri_s camera controller firmware. Using class-based approach as an experiment in Arduino code structure.

ino/mcopy_arri_s_firmware/mcopy_arri_s_firmware.ino

@@ -0,0 +1,117 @@
+volatile boolean DEBUG = true;
+
+class ArriSMotor {
+  public:
+	int speed = 255;
+	int average = -1;
+    boolean direction = true;
+    boolean running = false;
+    boolean primed = false;
+
+    void Begin () {
+		pinMode(pinPositive, OUTPUT);
+		pinMode(pinNegative, OUTPUT);
+		pinMode(pinMicroswitch, INPUT_PULLUP);
+	}
+    
+    void Start (boolean dir) {
+    	startTime = millis();
+    	direction = dir;
+
+    	Run(direction, speed);
+
+		running = true;
+		primed = false;
+    };
+
+    void Run (boolean dir, int speed) {
+    	if (dir) {
+    		analogWrite(pinPositive, speed);
+    		analogWrite(pinNegative, 0);
+    	} else {
+    		analogWrite(pinPositive, 0);
+    		analogWrite(pinNegative, speed);
+		}
+    }
+    
+    void CheckMicroswitch () {
+		int value = digitalRead(pinMicroswitch);
+		if (value == 1) {
+			if (running && !primed && millis() - startTime > primeTime) {
+				primed = true;
+			}
+		}
+
+		if (value == 0) {
+			if (running && primed && millis() - startTime > minTime) {
+				Stop();
+			}
+		}
+	};
+
+  private:
+    int pinPositive = 5;
+    int pinNegative = 6;
+    int pinMicroswitch = 7;
+
+    int startTime = 0;
+    int primeTime = 100;
+    int minTime = 200;
+
+    void Stop () {
+    	int val = 1;
+    	digitalWrite(pinPositive, LOW);
+    	digitalWrite(pinNegative, LOW);
+    	Run(!direction, 55);
+    	delay(50);
+    	digitalWrite(pinPositive, LOW);
+    	digitalWrite(pinNegative, LOW);
+    	running = false;
+    	primed = false;
+    	EvaluateTiming();
+    }
+
+    void EvaluateTiming () {
+    	long ms = millis() - startTime;
+
+    	if (ms < 0) {
+    		return;
+    	}
+
+    	if (average == -1) {
+    		average = ms;
+    	} else {
+    		average = round(( ms + average ) / 2);
+    	}
+
+    	if (DEBUG) {
+			Serial.print("Frame: ");
+			Serial.print(ms);
+			Serial.println("ms");
+
+			Serial.print("Average: ");
+			Serial.print(average);
+			Serial.println("ms");
+		}
+    }
+};
+
+ArriSMotor motor;
+
+void setup() {
+	Serial.begin(57600);
+	motor.Begin();
+}
+
+boolean d = false;
+void loop() {
+	if (!motor.running) {
+		delay(3000);
+		motor.Start(d);
+		d = !d;
+	}
+	motor.CheckMicroswitch();
+	if (!motor.primed) {
+		delay(1);
+	}
+}