A5020 Angular Sensor with Arduino

Hello Friends , 

     Here we created this article for Angular sensor reading taking using Arduino. Angular sensor is mostly use for precession linear or angular position sensing. Or alterative for potentiometer.

   

   Here I am using AS5020  6-Bit Absolute Angular  Position Sensor of simple magnet source that is placed at the surface. A total of 64 absolute angular positions are available within the full range of 360°. The device includes a Hall sensor array, the signal  conditioning and the post processing needed to generate a 6- bit binary code. The binary code may be accessed via the Synchronous Serial Interface (SSI).

NOTE : Zero-position programming allows one time programming of a user specific zero position between the device and the magnet source.

 

Pin Configuration :

AS5020 Angular Sensor

Pin 1 #  DATA :   DATA Output of the SSI. If PD/CSn=0, the measured angle data (6-bit value) is serially shifted out over this pin by the CLK, starting with the MSB. A NVR bit and a PARITY bit are added. Even Parity is given. (NVR=1 indicates a Non Valid Range of the magnetic field)

Pin 2 #  VDD : Positive Supply Voltage. 

Pin 3 #  VSS  :  Negative Supply Voltage (GND).

Pin 4 #  PROG : Programming Input. This pin is used to program the zero position into a non-volatile memory (One Time Programmable). The programmed value is subtracted from the actual measured angle. (This pin is also used for Data In during Daisy-Chain function)

Pin 5 #  N.C :  Not Connected during operation. This pin is for manufacturers use only.

Pin 6 #  N.C :  Not Connected during operation. This pin is for manufacturers use only.

Pin 7 # PD/CSn : Power Down Input, Disable or Chip Select (active low). PD/CSn=0 activates the device and enables the measurement. PD/CSn=1 sets the device in power save mode and puts the DATA pin in high impedance (high Z) state.

Pin 8 #  CLK : CLOCK Input of the SSI.Pin 8 serially clocks out the measured angle data at Pin 1 (DATA).

Basic Diagram  :

Schematics for basic application

Initial angular orientation

Schematic Diagram  :

Circuit Diagram  of Angular sensor with Arduino

   
const int clockpin = 13;
const int datapin = 12;
const int cspin = 10;


void setup() 
{
  Serial.begin(9600);
  pinMode(clockpin, OUTPUT);
  pinMode(cspin, OUTPUT);
  pinMode(datapin, INPUT);

  digitalWrite(cspin, HIGH);
  digitalWrite(clockpin, LOW);
}

void loop() 
{
    digitalWrite(cspin, LOW);
    digitalWrite(clockpin, HIGH);
    delayMicroseconds(10);
    digitalWrite(clockpin, LOW);
    delayMicroseconds(10);

    
    byte data = shiftIn(datapin, clockpin, MSBFIRST);
  
    digitalWrite(cspin, HIGH);
    Serial.println(data);

    
    Serial.println(data, BIN);
   
    delay(1000);
}