Encoder becomes alive (AS5140)

Today's morning started from AS5140 commissioning.

 You can see wiring connection on the pictures below:

 Here is simple arduino sketch:

/*
This scetch was developed buy Ing. Dmitry Kochubey
in Technical university of Liberec
Czech Republic
year 2013
*/


#define cs 2
#define clk 3
#define din 4
#define prog 5

unsigned short data = 0;
unsigned short stat = 0;
unsigned short pos = 0;
boolean OCF = false;
boolean COF = false;
boolean LIN = false;
boolean MagINCn = false;
boolean MagDECn = false;
boolean EvenParity = false;

void AS5140_Init(void)
{
  pinMode(cs, OUTPUT);
  pinMode(clk, OUTPUT);
  pinMode(prog, OUTPUT);
  pinMode(din, INPUT);
  digitalWrite(din, LOW);
 
  digitalWrite(cs, LOW);
  digitalWrite(clk, HIGH);
  digitalWrite(prog, LOW); //or you can connect prog to the ground
  delayMicroseconds(50);
}

unsigned short AS5140_Ssi(void)
{
    unsigned short i, data;
    digitalWrite(cs, LOW);
    digitalWrite(clk, LOW);
    data          = 0;

    for (i = 0; i < 16; i++)
    {
        digitalWrite(clk, HIGH);
        delayMicroseconds(1);
        digitalWrite(clk, LOW);

        data = data << 1;                // shift bits in target variable one to the left
        if ( digitalRead(din) )        // read port bit
        {
            data |=0x01;                 // set new bit in 16 bit variable
        }
        delayMicroseconds(1);
    }
        digitalWrite(cs, HIGH);

    return data;
}

void setup() {
  AS5140_Init();
  Serial.begin(9600);
}


void loop() {
 data = AS5140_Ssi();
 stat = (data & 0b0000000000111111);
 OCF = data & 32;
 COF = data & 16;
 LIN = data & 8;
 MagINCn = data & 4;
 MagDECn = data & 2;
 EvenParity = data & 1;
 Serial.print("Status=");
 Serial.println(stat,BIN);
 if ((stat>>1)==0b10000) //data validation check
 {
  pos = (data & 0b11111111111000000) >> 6;
  Serial.print("Position=");
  Serial.println(pos,DEC);
 }
 delay(100);
}

Enjoy!