#include <mega48.h>

// SPI functions
#include <spi.h>

// Declare your global variables here
#define	LOAD  	PORTB.2 // connect to pin 12 of all 74HC595
flash unsigned int power[8]={1,2,4,8,16,32,64,128};

void main(void)
{
// Declare your local variables here
unsigned char i,row,frame[24][5];

// Input/Output Ports initialization
// Port B initialization
// Func7=In Func6=In Func5=Out Func4=In Func3=Out Func2=Out Func1=Out Func0=In 
// State7=T State6=T State5=0 State4=T State3=0 State2=0 State1=0 State0=T 
PORTB=0x00;
DDRB=0x2E;


// SPI initialization
// SPI Type: Master
// SPI Clock Rate: 2*5000.000 kHz
// SPI Clock Phase: Cycle Start
// SPI Clock Polarity: Low
// SPI Data Order: MSB First
SPCR=0x54;
SPSR=0x01;

while (1)
      {
      // Place your code here
      //load 1 frame from memory
      for(row=0;row<24;row++)
        { 
        for(i=0;i<5;i++) 
            {
            spi(frame[i][0]);
            };  
        if(row<8)
            {
            spi(0);
            spi(0);
            spi(power[row]);
            }
        else
            {
            if(row<16)
                {
                spi(0);
                spi(power[row-8]);
                spi(0);
                }
            else
                {      
                spi(power[row-16]);
                spi(0);
                spi(0);
                };
            };
         };
      LOAD=1;
      LOAD=0;   
      };
}