AD7714

#include <SPI.h>

// SS    10 // CS
// MOSI  11 // DIN
// MISO  12 // DOUT
// SCK   13 // SCLK
// RESET  7 
// DRDY   8

// POL, AVdd, DVdd, SYNC,STANDBY = VCC
// AGDN, DGDN,REF IN(-), BUFFER = GND
// REF IN(+) = +1.25...2.5 V
#define RESET 7
#define DRDY 8

long bt24,hi,mid,lo;
int in = 0b001; // Channel Selection AIN1_AIN6
// Pseudo Differential
// AIN1_AIN6 = 0b000
// AIN2_AIN6 = 0b001
// AIN3_AIN6 = 0b010
// AIN4_AIN6 = 0b011

// Fully Differential
// AIN1_AIN2 = 0b100
// AIN3_AIN4 = 0b101
// AIN5_AIN6 = 0b110

void setup(){
  Serial.begin(9600);
  pinMode(DRDY,INPUT); // DRDY
  pinMode(RESET,OUTPUT);// RESET
  digitalWrite(RESET,LOW);
  SPI.beginTransaction(SPISettings(SPI_CLOCK_DIV2, MSBFIRST, SPI_MODE3));
  SPI.begin();
  digitalWrite(RESET,HIGH);
  delay(300);
  }

void loop(){
in = 0b001;
 Write();
Read();
Serial.println(bt24);
in = 0b010;
 Write();
Read();
Serial.println(bt24);
  } 

void Write(){
  digitalWrite(RESET,HIGH);
  digitalWrite(SS, LOW);
  delayMicroseconds(1);
/////////////// Filter High Register /////////////////////////////////////////////
  // BU WL BST CLKDIS FS11 FS10 FS9 FS8
  // BU   1 UNIPOLAR, 0 BIPOLAR
  // WS   0 = 16 bit, 1 = 24 bit
  // BST  2.4576 MHz BST=0, 1.0000 MHz BST=1
  // CLKDIS   0 (от кварца)
  // FSx  HIGH 4 BITS FILTER (12 BITS)
  SPI.transfer(0b00100000 + in); // Communications Register >  Filter High Register
  SPI.transfer(0b11100001); //  Filter High Register

////////////// Filter Low Register //////////////////////////////////////////////
  // FS7 FS6 FS5 FS4 FS3 FS2 FS1 FS0
  // LOW 8 BITS FILTER (12 BITS)
  SPI.transfer(0b00110000 + in); // Communications Register >  Filter Low Register
  SPI.transfer(0b10000000); //  Filter Low Register
  // 2.4576 MHz / 128 / 4000 (111110100000) = 4.8 Hz
  // FS11...FS8 1111, FS7...FS0 10100000

//////////////// Mode Register /////////////////////////////////////////////////
  // MD2 MD1 MD0 G2 G1 G0 BO FSYNC
  // MDx  Operating Mode 
  
  // Gx   Gain Setting 000...111 = 1...128 GAIN 
  // 000 = x1, 001 = x2, 010 = x4, 011 = x8, 100 = x16, 101 = x32, 110 = x64, 111 = x128 
  
  // BO, FSYNC = 0
  SPI.transfer(0b00010000 + in); // Communications Register > Mode Register
  SPI.transfer(0b00100000); // Mode Register //  MDx = 001 Self-Calibration

  digitalWrite(SS, HIGH);
  delay(10);
  }   
void Read(){
  while(digitalRead(DRDY)!=LOW); 
         digitalWrite(SS, LOW);
         delayMicroseconds(1);
         SPI.transfer(0b01011000 + in);    
         hi = SPI.transfer(0xFF);
         hi = hi<<16;
         mid = SPI.transfer(0xFF);
         mid = mid<<8;
         lo = SPI.transfer(0xFF);
         bt24 = hi | mid | lo;
         digitalWrite(SS, HIGH);
         while(digitalRead(DRDY)!=HIGH);
         delay(10);
         digitalWrite(RESET,LOW);
  }