First pulse is not counting

[ADGAN]

Hi! I wrote a program to count the pulses coming from an energy measurement IC. But I observed that the first pulse is not counted both in Proteus and in hardware. So I'm assuming that something must be wrong in the software. I'm using the timer1 for this task of PIC16F887. What I suspect is the T1CON. What is the mistake I have done?

void main()
{
     ANSEL = 0;
     ANSELH = 0;
     TRISA = 0;
     C1ON_bit = 0;                      // Disable comparators
     C2ON_bit = 0;
     PORTA.RA0 = 1;
     TRISB = 0;
     PORTB = 0;
     PORTC = 0;
     TRISC = 0x99;
     INTCON = 0xC0;

     PIE1.TMR1IE = 1;
     PIR1.TMR1IF = 0;

     T1CON = 0x03;
     TMR1L = 0;
     TMR1H = 0;
     I2C1_Init(100000);
     Lcd_Init();
     Delay_ms(100);                  // Delay 100ms
     Lcd_Cmd(_LCD_CURSOR_OFF);
     Lcd_Cmd(_LCD_CLEAR);
     
 

      while(1){

      pulses = (count*65536)+ (TMR1H<<8 | TMR1L);
     
      LongToStr(pulses,txt);
      Lcd_out(1,9,txt);



      }
   }

 

[paulfjujo]

see datasheet

After Timer1 is enabled in Counter mode, the module must first have
a falling edge before the counter begins to increment

are the following pulses on RC0 counted ?

 

[ADGAN]

Yes all the other pulses are counting correctly. How do I correct this?

 

[Ahmmed Razu]

Yes all the other pulses are counting correctly. How do I correct this?

you can apply an inverter gate between an energy measurement IC and T1CKI pin. I think it may solve your problem.

 

[ADGAN]

ok thanks !