ADS124S08EVM: Interfaced ADS124S08 EVM with arduino and logging data to SD card problem

#include <SPI.h>
#include <SD.h>
#include <TimerOne.h>
#define START 6
#define RESET 7
#define CS  8
#define SD_CS_PIN 53

int32_t stat;
SPISettings settings1(4000000, MSBFIRST, SPI_MODE1);

void setup() {
  Serial.begin(9600);
  Serial.print("Initializing SD card...");

 
  if (!SD.begin(SD_CS_PIN)) {
    Serial.println("Card failed, or not present");
    
    return;
  }
  Serial.println("card initialized.");
  
SPI.begin();

pinMode(CS,OUTPUT);
pinMode(RESET, OUTPUT);
pinMode(START,OUTPUT);
digitalWrite(RESET , HIGH);
delay(5); 

SPI.beginTransaction(settings1);
digitalWrite(CS, LOW);
digitalWrite(START,LOW);
}

void loop() {
  
for(int i=0;i>=0;i++)
{
  
if(i==0){
SPI.transfer(0x42); // WREG register adress
SPI.transfer(0x07); // WREG byte number -1
SPI.transfer(0xAC); // WREG write AIN10-AINCOM,(1010 1100) binary,MUXP and MUXN selection
SPI.transfer(0x08); // gain =1
SPI.transfer(0x14); // DATA RATE 20 SPS
SPI.transfer(0x19); //REF on (0001 10-ref 01)
SPI.transfer(0x00); // IDAC MAG
SPI.transfer(0xFF); // IDAC MUX
SPI.transfer(0x00);// Vbias
SPI.transfer(0x12);// Timeout bit second =1 ,default is 10h
SPI.transfer(0x08); // start converting command
delay(1);
}
else
{
digitalWrite(CS, LOW);
SPI.transfer(0x12); //RDATA command 
stat = SPI.transfer(0) ;
stat = (stat<<8) | SPI.transfer(0); 
stat = (stat<<8) | SPI.transfer(0);
digitalWrite(CS, HIGH);
if (stat & 0x800000)
{
  stat = (stat | 0xFF000000);
}

File dataFile = SD.open("datalog.txt", FILE_WRITE);
if (dataFile) {
    dataFile.println(stat);
    dataFile.close();
  }

  else {
    Serial.println("error opening datalog.txt");
  }
}

}
SPI.endTransaction();
}