SPI EEPROM Read Example

#include <SPI.h>

#define DATAOUT 11//MOSI
#define DATAIN  12//MISO
#define SPICLOCK  13//SCK
#define EEPROM_PIN 6//CS

//opcodes
#define WREN  6
#define WRDI  4
#define RDSR  5
#define WRSR  1
#define READ  3
#define WRITE 2

int result, address=0;

void setup() {
 Serial.begin(9600);
 Serial.println("Read test pin setup starting");

 pinMode(DATAOUT, OUTPUT);
 pinMode(DATAIN, INPUT);
 pinMode(SPICLOCK,OUTPUT);
 pinMode(EEPROM_PIN,OUTPUT);
 digitalWrite(EEPROM_PIN, HIGH);

 SPI.begin();
 SPI.setDataMode(SPI_MODE3);  //setup SPI protocol
 SPI.setClockDivider(SPI_CLOCK_DIV2); // 10 Mhz max for 25LC256
 SPI.setBitOrder(MSBFIRST);
 delay(10);

 Serial.println("Read test loop start");
 digitalWrite(EEPROM_PIN, LOW);
 SPI.transfer(READ); // read 3,0
 SPI.transfer(address>>8); // registry
 SPI.transfer(address); // registry

 for(int i=address; i<=20; i++)
 {
   result = SPI.transfer(0x00);

   Serial.print(i);
   Serial.print(" : ");
   Serial.println(result);
   address++;
 }

 digitalWrite(EEPROM_PIN, HIGH);
}

void loop() {
}