Ractive at 15:04, 7 October 2018

2018-10-07T15:04:43Z

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			//Rotary Encoder
			/*You will see the angular displacement of the rotary encoder printed on Serial Monitor.
			When you turn the rotary encoder clockwise, the angular displacement is increased;
			when turn it counterclockwise, the displacement is decreased.
			If you press the switch on the rotary encoder, the readings will return to zero.*/
			//Email: support@sunfounder.com
			//Website: www.sunfounder.com
			//2015.5.7
			const int clkPin= 2; //the clk attach to pin 2
			const int dtPin= 3; //the dt pin attach to pin 3
			const int swPin= 4 ;//the sw pin attach to pin 4
			int encoderVal = 0;
			void setup()
			{
			//set clkPin,dePin,swPin as INPUT
			pinMode(clkPin, INPUT);
			pinMode(dtPin, INPUT);
			pinMode(swPin, INPUT);
			digitalWrite(swPin, HIGH);
			Serial.begin(9600); // initialize serial communications at 9600 bps
			}
			void loop()
			{
			int change = getEncoderTurn();//
			encoderVal = encoderVal + change;
			if(digitalRead(swPin) == LOW)//if button pull down
			{
			encoderVal = 0;
			}
			Serial.println(encoderVal);
			}
			int getEncoderTurn(void)
			{
			static int oldA = HIGH; //set the oldA as HIGH
			static int oldB = HIGH; //set the oldB as HIGH
			int result = 0;
			int newA = digitalRead(clkPin);//read the value of clkPin to newA
			int newB = digitalRead(dtPin);//read the value of dtPin to newB
			if (newA != oldA \|\| newB != oldB) //if the value of clkPin or the dtPin has changed
			{
			// something has changed
			if (oldA == HIGH && newA == LOW)
			{
			result = (oldB * 2 - 1);
			}
			}
			oldA = newA;
			oldB = newB;
			return result;
			}

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2018-10-07T15:01:59Z

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Sunfounder Rotery Encoder - Revision history

Ractive at 15:04, 7 October 2018

Ractive: Created page with "File:Fgvr.jpg"