//Peter Greczner - pag42@cornell.edu
//Matthew Rosoff - msr53@cornell.edu

#define wr_adcref 0x76
#define wr_drivc 0x75
#define rd_sensor 0x11
#define rd_spidata 0x20
#define rd_spistat 0x21
#define rd_regs 0x50
#define wr_sensm 0x77
#define wr_xsense 0x7F
#define wr_ysense 0x81
#define wr_xshift 0x82
#define wr_yshift 0x83
#define wr_xreads 0x84
#define wr_fifo_th 0x7C

#define dummy_byte 0xFF
#define dummy_byte_n 0x00


void initSPI(void){
        
        unsigned char i;
        DDRB=0xB0;//MOSI,SCK,SS' are output
        PORTB.4=0;//Set CS'=0
        i=SPSR;
        i=SPDR;//This resets the SPI regs
  

        PORTB.4=0;//Set CS'=0
        PORTA.7=0;
        
        //SPI commands to set up the fingerprint readers correct parameters
        SPDR=wr_drivc;
        while(!(SPSR&0x80));
        SPDR=127;


        while(!(SPSR&0x80));
        SPDR=wr_adcref;

        while(!(SPSR&0x80));
        SPDR=2;

        while(!(SPSR&0x80));
        SPDR=wr_sensm;

        while(!(SPSR&0x80));
        SPDR=0;


        while(!(SPSR&0x80));
        SPDR=wr_xshift;

        while(!(SPSR&0x80));
        SPDR=18;

        while(!(SPSR&0x80));
        SPDR=wr_yshift;

        while(!(SPSR&0x80));
        SPDR=199;

        while(!(SPSR&0x80));
        SPDR=wr_fifo_th;

        while(!(SPSR&0x80));
        SPDR=0;

        while(!(SPSR&0x80));
        SPDR=wr_xreads;

        while(!(SPSR&0x80));
        SPDR=1;
        
        //PORTB.4=1;//Set CS'=0
        //PORTA.7=1;
        
        return;
}