char values[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7b,0x07,0x7f,0x6f};

volatile char *TRISD,*TRISA,*PORTTD,*PORTTA;

void init_ssd()
{
  TRISD =  0x30;
  *TRISD =  0xFF;

  TRISA = 0x107;
  *TRISA =  0xFF;

  PORTTD = 0x31;
  *PORTTD = 0x00;

  PORTTA = 0x108;
  *PORTTA = 0x00;  

}

void display_each(unsigned char data,char index)
{
    *PORTTD = data;
    *PORTTA = (*PORTTA & 0xF0) | (0x01 << index);
}

void display_all(unsigned char small_arr[],char *index,long *delay_2)
{
    display_each(small_arr[*index],*index);
    
    if(++(*delay_2) == 50000)
    {
        (*index)++;
        *delay_2 = 0;

        if(*index == 4)
        *index = 0;
    }
}

void setup() {
  init_ssd();
   volatile char index = 0,ind_1 = 0,ind_2 = 1,ind_3 = 2,ind_4 = 3;
   volatile long delay_2 = 0,delay_1 = 0;
    
    
    unsigned char large_array[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7b,0x07,0x7f,0x6f,0x00,0x00};
    unsigned char small_array[4];
    small_array[0] = large_array[ind_1];
        small_array[1] = large_array[ind_2];
        small_array[2] = large_array[ind_3];
        small_array[3] = large_array[ind_4];
    while(1)
    {
        

        for(int i = 0;i < 4;i++)
        {
          *PORTTD = small_array[i];
          *PORTTA = (*PORTTA & 0xF0) | (0x01 << i);
          for(volatile long k = 500000;k--;);
        }
        
        // display_all(small_array,&index,&delay_2);
        
        // if(index == 4)
        // {
        //     if(++delay_1 == 500000)
        //     {
        //         // Re-Initialization
        //         if(ind_1 == 12)
        //             ind_1 = -1;
        //         else if(ind_2 == 12)
        //             ind_2 = -1;
        //         else if(ind_3 == 12)
        //             ind_3 = -1;
        //         else if(ind_4 == 12)
        //             ind_4 = -1;

        //         //Incrementation
        //         ind_1++;
        //         ind_2++;
        //         ind_3++;
        //         ind_4++;
                
        //         //delay_1 re-assignment
        //         delay_1 = 0;
        //     }
            
        //     //index re-assignment
        //         index = 0;
        // }
    }
  
}