void SPI_MasterInit(void) {
        /* Set MOSI and SCK output, all others input */
        DDR_SPI = (1<<DD_MOSI) | (1<<DD_SCK);
        /* Enable SPI, Master, set clock rate fck/16 */
	SPCR = (1<<SPE) | (1<<MSTR) | (1<<SPR0);
}

void SPI_MasterTransmit(char cData) {
        /* Start transmission */
        SPDR = cData;
        /* Wait for transmission complete */
        while (!(SPSR & (1<<SPIF))) ;
}