#include <SPI.h>
#include "string.h"
#include "stdio.h"
#include "stdlib.h"

#define cs_pin              7

void setup() {
  
  Serial.begin(9600);
  
  SPI.begin();
  SPI.setDataMode(SPI_MODE1); 

  pinMode(cs_pin, OUTPUT); //cs
  digitalWrite(cs_pin,HIGH); //cs
  delay(1000);

 digitalWrite(cs_pin,LOW);
   SPI.transfer(0x03);
   SPI.transfer(0x01);
   digitalWrite(cs_pin,HIGH);
   ///// Range select register //////////
   digitalWrite(cs_pin,LOW);
   SPI.transfer(0x05);
   SPI.transfer(0x06);
   digitalWrite(cs_pin,HIGH);
////// Manual channel slelction ///////
   digitalWrite(cs_pin,LOW);
   SPI.transfer(0xC0);
   SPI.transfer(0x00);
   //digitalWrite(cs_pin,HIGH);

  //digitalWrite(cs_pin,LOW);
  //SPI.transfer(0x00);
  SPI.transfer(0xFF);
  SPI.transfer(0xFF);
  SPI.transfer(0xFF);
  digitalWrite(cs_pin,HIGH);

  digitalWrite(cs_pin,LOW);
  SPI.transfer(0x00);
  SPI.transfer(0x00);
  Serial.println(SPI.transfer(0xFF));
  Serial.println(SPI.transfer(0xFF));
  Serial.println(SPI.transfer(0xFF));
  digitalWrite(cs_pin,HIGH);
}

void loop() {
  uint32_t adc = 0;
  delay(1);
  digitalWrite(cs_pin,LOW);
  SPI.transfer(0x00);
  SPI.transfer(0x00);
  adc |= SPI.transfer(0xFF) << 10;
  adc |= SPI.transfer(0xFF) << 2;
  adc |= SPI.transfer(0xFF);

  Serial.println(adc);

  digitalWrite(cs_pin,HIGH);
  delay(1000);
}