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;
  volatile char Column_select[]=
  {
    0b11000011, 
    0b11000011,
    0b11000011,
    0b11000011,
    0b11011011,
    0b11111111,
    0b11100111,
    0b11000011, // W
// aabbb                  jjjjjjjjjjjjjjjjjjjjjjjjjjj
    0b00000000,
    0b00000000,
     0b00000000,
    0b00111100,
    0b01100110,
   0b01111110,
     0b00000110,
   0b00111100, // e

    0b00000110,
  0b00000110,
    0b00000110,
   0b00000110,
    0b00000110,
   0b00000110,
   0b00000110,
    0b00001100, // l

0b00000000,
  0b00000000,
    0b00000000,
       0b00111100,
          0b00110110,
           0b00000110,
            0b00000110,
                0b00111100,
                // c
 0b00000000,
    0b00000000,
    0b00000000,
   0b00111100,
    0b01100110,
     0b01100110,
    0b01100110,
   0b00111100,
     // o

     
   0b00000000, 
    0b00000000, 
     0b01101110,
     0b11011011,
    0b11011011,
   0b11011011,
0b11011011,
0b11011011,
    // m

    0b00000000,
    0b00000000,
     0b00000000,
    0b00111100,
    0b01100110,
   0b01111110,
     0b00000110,
   0b00111100, // e
    };
  volatile char *dir_b,*outB;
  dir_b=0x24;
  outB=0x25;
  *dir_b=0x01;
  while(1)
  {
    f=0;
    Row_select=0x01;
   for(k=0;k<7;k++)
   {
    l=0;
   while(l<20)
   {
   Row_select=0x01; 
  for(int i=f;i<f+8;i++)
  {
     *outB=0x00;
     SPI_TRANSMIT(Row_select++);
     SPI_TRANSMIT(Column_select[i]);
     *outB=0x01;
  }
  l++;
   }
   f=f+8;
   }
}
}