dong ho bam giay

#include <main.h>
#define led PIN_A0
#define speak PIN_A1

CHAR phut,giay,phut1,giay1,i;
UNSIGNED char CONST ma[10] ={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xf8,0x80,0x90};


void hien_thi()
{
      output_d(0x01);
      output_c(ma[phut/10]);
      delay_ms(5);
      output_d(0x02);
      output_c(ma[(phut%10)]);
      delay_ms(5);
      output_d(0x04);
      output_c(ma[giay/10]);
      delay_ms(5);
      output_d(0x08);
      output_c(ma[giay%10]);
      delay_ms(5);
      output_d(0x10);
      output_c(ma[phut1/10]);
      delay_ms(5);
      output_d(0x20);
      output_c(ma[(phut1%10)]);
      delay_ms(5);
      output_d(0x40);
      output_c(ma[giay1/10]);
      delay_ms(5);
      output_d(0x80);
      output_c(ma[giay1%10]);
      delay_ms(5);
}
void dem(char time)
{
      giay=giay+1;
      IF (giay == 60)
      {
      phut= phut + 1;
      giay=0;
      }
      for(i=1;i<=time;i++)
      {
      hien_thi();
      if (!input (PIN_B3)) break;
      }
}
#INT_RB

void  RB_isr(VOID)
{
   IF (!input (PIN_B0))                      //tang led 1
   {  output_high(speak);                       // bat coi
      delay_ms (80);
      while(!input (PIN_B0))
      {giay1=giay1+1;
      IF (giay1 == 60)
      {
      phut1= phut1 + 1;
      giay1=0;
      if (phut1==61) phut1=0;
      }
      for(i=1;i<=10;i++)
      hien_thi();
      }
      output_low(speak);                        // tat coi
   }

   IF (!input (PIN_B1))                     // giam led 1
   {
      output_high(speak);                       // bat coi
      output_low(speak);                        // tat coi
      delay_ms (80);
      while(!input (PIN_B1))
      {giay1=giay1-1;
      IF (giay1 == -1)
      {
      phut1= phut1 - 1;
      giay1=59;
      if (phut1==-1) phut1=60;
      }
      for(i=1;i<=10;i++)
      hien_thi();
      }
   }

   IF (input (PIN_B2) == 0)                      // tang led 2
   {
      output_high(speak);
      for(i=1;i<=15;i++)  hien_thi();
      output_low(speak);
      phut=giay=0;
      output_low(led);

   }

   IF (input (PIN_B3) == 0)                        //giam led 2
   {
      output_high(speak);
      for(i=1;i<=10;i++)  hien_thi();
      output_low(speak);
      while(input(PIN_B3)==1)
      {
      if (phut < phut1) dem(20);
      else if ((phut==phut1)&&(giay < giay1)) dem(20);
      else {output_high(led); break;}
      }
   }
}
void main()
{
   //setup_comparator (NC_NC_NC_NC); // This device COMP currently not supported by the PICWizard
   ext_INT_edge (L_TO_H);          // Ngat canh len
   enable_interrupts (INT_RB) ;    // Cho phep ngat port B
   enable_interrupts (GLOBAL) ;    // Cho phep ngat toan cuc
   WHILE (TRUE)
   {
      hien_thi () ;
      //output_a(0xff);
   }
}