ADS1247 spi internal temp

Joseph,

I used an oscilloscope to see it the communication is correct and I 'read' the bytes sent to and from the ADS. I kept the CS line low throughout the entire transaction, perhaps I need to set CS to high in the end.

By gibberish I mean 3 random bytes, at first I was receiving 7F FF FF, which according to the datasheet means overflow.

Sorry for taking long to reply. i cleaned up the arduino code and commented it. I'm also sending you the the pins you requested. since my oscilloscope only has two channels I kept the clock(yellow/orange) in all the images. I have a 1uF capacitor on VREFOUT to VREFCOM, it is wired according to page 88 of the datasheet. strange this is that now I'm getting 7FFFFF.

#include <SPI.h>
unsigned long A2DVal =0x0;
//vdd 5v
//spi 500 kHz

void setup() {                               // start arduino setup
   pinMode(10, OUTPUT);
   pinMode(9, INPUT);
   SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE1));
   delay(2000);
   SPI.begin();  //turn on spi bus            // end arduino setup
   SPI.transfer(0x06);//reset ad
   delay(1);
   SPI.transfer(0x16);//issue sdatac    (command)
   SPI.transfer(0x40);//mux0            (command)
   SPI.transfer(0x02);//mux1            (command)
   SPI.transfer(0x01);//mux0              data
   //SPI.transfer(0b00110011);// mux1       data  int. temp
   SPI.transfer(0x31); //mux1             data     v offset
   SPI.transfer(0x43);//sys0            (command)
   SPI.transfer(0x07);//IDAC            (command)
   SPI.transfer(0x00); //sys0             data
   SPI.transfer(0x07);// idac             data
   SPI.transfer(0x4b);//IDAC1           (command)
   SPI.transfer(0x00);//                (command)
   SPI.transfer(0x01);//                  data
   SPI.transfer(0xff);// NOP              data

   Serial.begin(115200);
}

void loop() {
  if (digitalRead(9) == 0){
        Serial.println("New data");
        digitalWrite(10,LOW);//         CS pin to low
        A2DVal = 0x0;//                  byte read
        SPI.transfer(0x12);// read      (command)
        A2DVal |= SPI.transfer(0xff);//    NOP
        Serial.println(A2DVal,HEX);//                   arduino serial com. to computer (serves as a delay)
        A2DVal |= SPI.transfer(0xff);//    NOP
        Serial.println(A2DVal,HEX);//                   arduino serial com. to computer (serves as a delay)
        A2DVal |= SPI.transfer(0xff);//    NOP
        Serial.println(A2DVal,HEX);//                   arduino serial com. to computer (serves as a delay)
        
        digitalWrite(10, HIGH);//     CS pin to high   
        delay(210);  
    }
  
}

clock and master in slave out:

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clock and master out slave in:

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CS pin: