ADS1256 RDATAC code snippet

//This is the function which gets a single conversion result from a chosen input.
//The code belongs to the following Youtube tutorial: https://youtu.be/GBWJdyjRIdM
//If you used the code, please SUBSCRIBE: https://www.youtube.com/c/CuriousScientist
/*
If you want to buy the parts and support me at the same time, please use the following affiliation links:
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*/
//Datasheet: http://www.ti.com/lit/ds/sbas288k/sbas288k.pdf

void readSingleContinuous()
{
  //Some commands should only be initiated in the beginning of this type of acquisition (RDATAC)
  //Therefore, we run them outside the while().
    SPI.beginTransaction(SPISettings(1700000, MSBFIRST, SPI_MODE1));
    digitalWrite(CS_pin, LOW); //REF: P34: "CS must stay low during the entire command sequence"

    waitforDRDY();//Wait for DRDY to go LOW
    SPI.transfer(B00000011);  //Issue RDATAC (0000 0011) command
    delayMicroseconds(7);    //Wait t6 time (~6.51 us) REF: P34, FIG:30.

    while (Serial.read() != 's')
    {
    registerData = 0; // every time we call this function, this should be 0 in the beginning!
    waitforDRDY();

    //Previously, we used 0x0F, here we use 0 for the SPI.transfer() argument;
    registerData |= SPI.transfer(0); //MSB comes in, first 8 bit is updated
    registerData <<= 8;                 //MSB gets shifted LEFT by 8 bits
    registerData |= SPI.transfer(0); //MSB | Mid-byte
    registerData <<= 8;                 //MSB | Mid-byte gets shifted LEFT by 8 bits
    registerData |= SPI.transfer(0); //(MSB | Mid-byte) | LSB - final result

    Serial.println(registerData);
    }
    digitalWrite(CS_pin, HIGH); //We finished the command sequence, so we switch it back to HIGH
    SPI.endTransaction();   //Close SPI
}