Program to use the SPI in slave mode

#include 

main()
{
	char s[6];
	int i;

	/****************************************************************
	 * SPI Setup
	*****************************************************************/
	DDRS = DDRS | 0x10;  /* MISO output */

	SP0CR1 = 0x40;  /* 0 1 0 0 0 0 0 0                          
                       | | | | | | | |
                       | | | | | | | \____ MSB first
                       | | | | | | \______ multiple bytes with SS asserted
                       | | | | | \________ 0 phase
                       | | | | \__________ 0 polarity
                       | | | \____________ Slave mode
                       | | \______________ not open drain
                       | \________________ Enable SPI
                       \__________________ No interrupts      
					*/

	SP0CR2 = 0;     /* Normal (not bi-directional) mode */
	/****************************************************************
	 * End of SPI Setup
	*****************************************************************/

	i = 0;

	while ((SP0SR & 0x80) == 0) ;  /* Wait for transfer to finish */
	s[i] = SP0DR;                  /* Read data from master */
	i = i + 1;

	while ((SP0SR & 0x80) == 0) ;  /* Wait for transfer to finish */
	s[i] = SP0DR;                  /* Read data from master */
	i = i + 1;

	while ((SP0SR & 0x80) == 0) ;  /* Wait for transfer to finish */
	s[i] = SP0DR;                  /* Read data from master */
	i = i + 1;

	while ((SP0SR & 0x80) == 0) ;  /* Wait for transfer to finish */
	s[i] = SP0DR;                  /* Read data from master */
	i = i + 1;

	while ((SP0SR & 0x80) == 0) ;  /* Wait for transfer to finish */
	s[i] = SP0DR;                  /* Read data from master */
	i = i + 1;

	s[i] = '\0';                   /* Terminate string */

    DBug12FNP->printf("%s\n",s);
}