SPI interface with other board_AVR_ESK1100 or among Arduino itself

Using Arduino Networking, Protocols, and Devices
19

Respected Sir

When I use ; it goes in infinite loop and does not give any output and without ; it gives output as
Output:

Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0
Read value 
0

Sir ,
Is this code correct, please suggest if something is wrong:

#include <SPI.h>// include the SPI library:

const int spidata = 10;//Pin 11 is data(MOSI) and pin 13 SCK ,set pin 10(SS) as the slave select for the digital pot:

void setup() {
  
  pinMode (spidata, INPUT);// set the spi_data_pin as an output:
  SPI.setDataMode(SPI_MODE3);
  SPI.setClockDivider(SPI_CLOCK_DIV8);
  SPI.begin();// initialize SPI:
  Serial.begin(9600);}
  
  byte ReadByte(void) {
   
  while(!(SPSR & (1<<SPIF)));
    return SPDR;
}

void loop() {
   
      int rxData;
  
    digitalWrite(spidata,LOW);
      rxData = ReadByte();
      Serial.println("Read value ");
     Serial.println(rxData, DEC);
    digitalWrite(spidata,HIGH);
   delay(1500);
}