void SPI_INIT()
{
  volatile char *dir_b,*outB,*spcr;  // initialization of portb and control register
  dir_b=0x24;// address of data direction port B 
  outB=0x25;  // Address of output port B
  spcr=0x4c;  // Address of control register 
  *dir_b=0x07; // output mode - DIN, SCK
  *outB=0x01;  // SS= 1;
  *spcr=0x51; 
}
void SPI_TRANSMIT(char ch)
{
 volatile char *spdr,*spsr;
 spsr=0x4d;
 *spsr=0x00;
 spdr=0x4e;
 *spdr=ch;

 while(!*spsr);
 delay(5);

}
void setup() {
  // put your setup code here, to run once:
  SPI_INIT();
}

void loop() 
{
  volatile char Row_select=0x01,k=0,f=0,l=0,z=0;
  volatile short Column_select[]=
  { 
    0b0110000110000000, 
    0b0110000110000000,
    0b0110000110000000,
    0b0110000110000000,
    0b0110110110000000,
    0b0111111110000000,
    0b0111001110000000,
    0b0110000110000000, // W

    0b0000000000000000,
    0b0000000000000000,
     0b0000000000000000,
    0b0011110000000000,
    0b0110011000000000,
   0b0111111000000000,
     0b0000011000000000,
   0b0011110000000000, // e 

    0b0000011000000000,
  0b0000011000000000,
    0b0000011000000000,
   0b0000011000000000,
    0b0000011000000000,
   0b0000011000000000,
   0b0000011000000000,
    0b0000110000000000, // l

0b0000000000000000,
  0b0000000000000000,
    0b0000000000000000,
       0b0011110000000000,
          0b0011011000000000,
           0b0000011000000000,
            0b0000011000000000,
                0b0011110000000000,
                // c
 0b0000000000000000,
    0b0000000000000000,
    0b0000000000000000,
   0b0011110000000000,
    0b0110011000000000,
     0b0110011000000000,
    0b0110011000000000,
   0b0011110000000000,
     // o

     
   0b0000000000000000, 
    0b0000000000000000, 
     0b0111011110000000,
     0b0110110110000000,
    0b0110110110000000,
   0b0110110110000000,
0b0110110110000000,
0b0110110110000000,
    // m

    0b0000000000000000,
    0b0000000000000000,
     0b0000000000000000,
    0b0011110000000000,
    0b0110011000000000,
   0b0111111000000000,
     0b0000011000000000,
   0b0011110000000000, // e
   
    };
    
  volatile char *dir_b,*outB;
  dir_b=0x24;
  outB=0x25;
  *dir_b=0x01;
  while(1)
  {
    f=0;
   for(k=0;k<7;k++)
   {
    for(int j=0;j<16;j++)
  {
    Row_select=0x01; 
    for(int i=f;i<f+8;i++)
    {
     *outB=0x00;
     SPI_TRANSMIT(Row_select++);
     SPI_TRANSMIT(Column_select[i]>>j);
     *outB=0x01;
    }
   }
   f=f+8;
   }
}
}