// Copyright 2006 Yamane Akira
//ICC-AVR application builder : 2005/07/18 0:20:02
// Target : M48
// Crystal: 4.0000Mhz
// SPI Sample Program for Slave
// Receive MOSI Data and Output PORTD corresponding Bit
// Also Output to MISO, the data 0 to 0xFF
// Programmed by Akira Yamane 

#include <iom48v.h>
#include <macros.h>

void port_init(void)
{
 PORTB = 0x10;
 DDRB  = 0x10; // MISO set to Output
 PORTC = 0x00; 
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0xFF;
}

//SPI initialize
void spi_init(void)
{
 volatile char IOReg;
 SPCR = 0x40; // (1 << SPE);
 SPSR = 0x00; // Clock Rate bit set to 00
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 spi_init();

 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EIMSK = 0x00;
 
 TIMSK0 = 0x00; //timer 0 interrupt sources
 TIMSK1 = 0x00; //timer 1 interrupt sources
 TIMSK2 = 0x00; //timer 2 interrupt sources
 
 PCMSK0 = 0x00; //pin change mask 0 
 PCMSK1 = 0x00; //pin change mask 1 
 PCMSK2 = 0x00; //pin change mask 2
 PCICR = 0x00; //pin change enable 
 PRR = 0x00; //power controller
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

unsigned char SPI_SlaveRxTx(unsigned char sdata)
  {
    SPDR = sdata;
   //wait for SPIF  
     while (!(SPSR & (1<<SPIF))) // wait SPIF set
	 ;
	 return SPDR;
  }

//
void main(void)
{
 unsigned char i;
 init_devices();
 //insert your functional code here...
    i=0x00;  
  while(1)
    {
	PORTD = ~BIT(SPI_SlaveRxTx(i));
	i++;
	}
}