Problem with Interfacing AD7730

Projects Networking, Protocols, and Devices
3

Hello Pylon,
Thanks for the reply.
I have tried but, Ready is not going low.
Below are the codes.
Harikesh

#include <SPI.h>
#define RESET 8 //
#define RDY 9

byte byte1;
byte byte2;
byte byte3;
long byte_total;
long time;

void setup()
{
  pinMode(RDY, INPUT);
  pinMode(RESET, OUTPUT);
  pinMode(SCK,OUTPUT);
  digitalWrite(SS, HIGH);
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE3);
  SPI.setClockDivider(SPI_CLOCK_DIV16);
  Serial.begin(9600);
  
  Serial.println("Reset ADC ...");
  digitalWrite(RESET,HIGH);
  delay(500);
  digitalWrite(RESET,LOW);
  delay(500);
  digitalWrite(RESET,HIGH);
  delay(500);
  Serial.println("Set up AD7730");
  digitalWrite(SS,LOW);
  SPI.transfer(0x03);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  //SPI.transfer(0x800010);
  SPI.transfer(0x10);
  SPI.transfer(0x00);
  SPI.transfer(0x80);
  digitalWrite(SS,HIGH);
  //delay(100);
  Serial.println("Set DAC register settings");
  digitalWrite(SS,LOW);
  SPI.transfer(0x04);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  SPI.transfer(0x23);
  digitalWrite(SS,HIGH);
  //delay(100);
  Serial.println("Channel 1 Internal full scale calibration");
  digitalWrite(SS,LOW);
  SPI.transfer(0x02);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  SPI.transfer(0xB180);// Initiating Internal Full Scale 0 to +10mv
  digitalWrite(SS,HIGH);
  digitalWrite(SS,LOW);
  SPI.transfer(0x02);
  digitalWrite(SS,HIGH);
  while(digitalRead(RDY) !=LOW) { Serial.println("calibration wait RDY"); delay(500); }
  Serial.println("calibration done");
  digitalWrite(SS,LOW);
  SPI.transfer(0x02);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  //SPI.transfer(0x9180);
  SPI.transfer(0x80);
  SPI.transfer(0x91);
  SPI.transfer(0x00);
  digitalWrite(SS,HIGH);
  digitalWrite(SS,LOW);
  SPI.transfer(0x02);
  digitalWrite(SS,HIGH);
  delay(100);
  while(digitalRead(RDY) !=LOW) { Serial.println("wait for RDY signal to goes LOW IN VOID SETUP2"); delay(500); }
}
    
void loop() {
  digitalWrite(SS,LOW);
  SPI.transfer(0x02);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  //SPI.transfer(0x2180); //continuous read from channel 1
  SPI.transfer(0x80);
  SPI.transfer(0x21);
  SPI.transfer(0x00);
  digitalWrite(SS,HIGH);
  //delay(100);
  digitalWrite(SS,LOW);
  SPI.transfer(0x21);
  digitalWrite(SS,HIGH);
  //delay(100);
  while(digitalRead(RDY) !=LOW){ 
    Serial.println("NOT RDY IN VOID LOOP");
    delay (1000);
  }
  
  delay(100);
  digitalWrite(SS,LOW);
  byte1 = SPI.transfer(0xff);
  byte2 = SPI.transfer(0xff);
  byte3 = SPI.transfer(0xff);
  digitalWrite(SS,HIGH);
  byte_total = (long)byte1 << 16; 
  byte_total += (long)byte2 << 8; 
  byte_total += (long)byte3;

  SPI.transfer(0x30); //end continous mode
  
  Serial.print(byte1,BIN); Serial.print(" ");
  Serial.print(byte2,BIN); Serial.print(" ");
  Serial.print(byte3,BIN); Serial.print(" ");
  Serial.print(byte_total); Serial.print("\n");
  //delay(1000);
}