seven_seg_comAnode_keypad_ccs_pic.c

#include <16F887.h>



#fuses HS,NOWDT,NOPROTECT,NOLVP

#use delay(crystal=4000000)

#define keypad_port PORTD
#define keypad_tris TRISD
#define init_segments() set_tris_b(0x00);

#define init_keypad() set_tris_d(0x0F);

#define c4 PIN_D7
#define c3 PIN_D6
#define c2 PIN_D5
#define c1 PIN_D4

#define r1 PIN_D3
#define r2 PIN_D2
#define r3 PIN_D1
#define r4 PIN_D0

unsigned char seg_code[]=
   {0x03,0x9F,0x25,0x0D,0x99,0x49,0x41,0x1F,0x01,0x09,0xFF};//a=pin7,g=pin1,dp=pin0

#define disp1  PIN_C0
#define disp2  PIN_C1
#define disp3  PIN_C2
#define disp4  PIN_C3



unsigned char digit4=0,digit3=0,digit2=0,digit1=0;
unsigned char bac_d1=0,bac_d2=0,bac_d3=0,bac_d4=0;


void backup_digits()
{

bac_d1=digit1;
bac_d2=digit2;
bac_d3=digit3;
bac_d4=digit4;
}

void restore_digits()
{
   digit1=bac_d1;
   digit2=bac_d2;
   digit3=bac_d3;
   digit4=bac_d4;



}
void off_all_digits()
{

   digit1=10;
   digit2=10;
   digit3=10;
   digit4=10;


}


void reset_digits()
{

   digit1=0;digit2=0;digit3=0;digit4=0;


}

void rotate_digits(unsigned char new_val)
{
   digit4=digit3;
   digit3=digit2;
   digit2=digit1;
   digit1=new_val;
}

void mux4()
{
   output_b(seg_code[digit4]);
   output_low(disp4);
   delay_ms(1);
   output_high(disp4);
   
   output_b(seg_code[digit3]);
   output_low(disp3);
   delay_ms(1);
   output_high(disp3);
   
   output_b(seg_code[digit2]);
   output_low(disp2);
   delay_ms(1);
   output_high(disp2);
   
   output_b(seg_code[digit1]);
   output_low(disp1);
   delay_ms(1);
   output_high(disp1);
   





}


void mdelay()
{
int i=0;
   for(i=0;i<13;i++)
    {
      mux4();
      delay_ms(5);  
    
    }



}



int readkeypad (void)
{
 output_bit (r1, 0);
 output_bit (r2, 0);
 output_bit (r3, 0);
 output_bit (r4, 0);
 output_bit (r1, 1);//activate 1st row and scan for column
mdelay();
//mdelay();
 IF (input (c1)) {while(input(c1)){mdelay();} RETURN 10;};
 IF (input (c2)) {while(input(c2)){mdelay();} RETURN 0;};
 IF (input (c3)) {while(input(c3)){mdelay();} RETURN 11;};
 IF (input (c4)) {while(input(c4)){mdelay();} RETURN 12;};
 output_bit (r1, 0);//Deactivate 1st row
 output_bit (r2, 1);//activate 2nd row and scan for column
mdelay();
//mdelay();
 IF (input (c1)) {while(input(c1)){mdelay();} RETURN 7;};
 IF (input (c2)) {while(input(c2)){mdelay();} RETURN 8;};
 IF (input (c3)) {while(input(c3)){mdelay();} RETURN 9;};
 IF (input (c4)) {while(input(c4)){mdelay();} RETURN 13;};
 output_bit (r2, 0);//Deactivate 2nd row
 output_bit (r3, 1);//activate 3rd row and scan for column
mdelay();
//mdelay();
 IF (input (c1)) {while(input(c1)){mdelay();} RETURN 4;};
 IF (input (c2)) {while(input(c2)){mdelay();} RETURN 5;};
 IF (input (c3)) {while(input(c3)){mdelay();} RETURN 6;};
 IF (input (c4)) {while(input(c4)){mdelay();} RETURN 14;};
 output_bit (r3, 0);//Deactivate 3rd row
 output_bit (r4, 1);//activate 4th row and scan for column
mdelay();
//mdelay();
 IF (input (c1)) {while(input(c1)){mdelay();} RETURN 1;};
 IF (input (c2)) {while(input(c2)){mdelay();} RETURN 2;};
 IF (input (c3)) {while(input(c3)){mdelay();} RETURN 3;};
 IF (input (c4)) {while(input(c4)){mdelay();} RETURN 15;};
 output_bit (r4, 0);//Deactivate 4th row
 RETURN 255;
}

void count4_up()
{

   digit1++;
   if(digit1>9)
   {
      digit1=0;
      digit2++;
      if(digit2>9)
      {
         digit2=0;
         digit3++;
         if(digit3>9)
          {
            digit3=0;   
             digit4++;
            if(digit4>9)
             {
               digit4=0;             
             }
          }
   
      }
   }



}
void count4_down()
{
   
   digit1--;
   if(digit1==255)
    {
      digit1=9;
      digit2--;
      if(digit2==255)
       {
         digit2=9;
         digit3--;
         if(digit3==255)
          {
            digit3=9;
            digit4--;
            if(digit4==255)
             {
               digit4=9;               
             
             }
          
          
          }
         
       
       }
      
    
    }



}
//-------------------------------------------------
void flash_all()
{
 char i=0;
 for(i=0;i<3;i++)
 {
   backup_digits();
   off_all_digits();
   mdelay();
   mdelay();
   mdelay();
   restore_digits();
   mdelay();
   mdelay();
   mdelay();
   
 }

}
//--------------------------------
void main()
{
int k=0;
init_segments();


   while(TRUE)
   {
   k=readkeypad();
   if(k>-1 && k<10)
    {
      
      rotate_digits(k);
    
    
    }
    else if(k==15)
     {
         count4_up();
         flash_all();
     
     }
     else if(k==14)
     {
         
         count4_down();
         flash_all();
     
     
     }
     else if(k==11)
     {
         reset_digits();
     
     }
     else if(k==12)
     {
         flash_all();
     
     }
     mdelay();
   }

}