//---------------------------------------------
// FREQUENCY COUNTER
// www.circuit-projects.com	
// Y.Erol
//---------------------------------------------



#include <pic.h>
#include <delay.c>

__CONFIG(WDTDIS&PWRTEN&LVPDIS&XT);

unsigned char kontrol;

//---------------------------------------------
//	     CCP1 INTERRUPT
//---------------------------------------------
void interrupt interrupt(void){
TMR1H=0; TMR1L=0;
GIE=0;

control=1; 

CCP1IF=0;
GIE=1;
}

//---------------------------------------------
//		MAIN PROGRAM
//---------------------------------------------
main(void)
{
unsigned const char number[10]={0x3F,0x06,0x5B,
  	    0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};	
unsigned char select[4]={1,2,4,8};
unsigned int counter,value,remainder1,remainder2;
float frekans;
unsigned char a,i,display[5],data;

TRISA=0x00;
TRISB=0x08;
CMCON=0x07;

cont=0;
PORTA=0; PORTB=0

CCP1IE=1;

CCP1CON=0b00000110; 

T1CON=0b00100001;
		  
GIE=1;
PEIE=1;

for(;;){


counter=256*CCPR1H+CCPR1L;

if(control==1)frequency=100000000/counter;
if(kontrol==0)frequency=0;

if(counter<10000)frequency=0; 

control=0;

for(a=0;a<25;a++){ 

	value=(int)frequency;

	display[1]=value/1000;
	remainder1=value-display[1]*1000;

	display[2]=remainder1/100;
	remainder2=remainder1-display[2]*100;

	display[3]=remainder2/10;
	display[4]=remainder2-display[3]*10;

	
	for(i=0;i<4;i++){
		PORTB=0;
		PORTA=0;

		data=number[display[i+1]];
		PORTB=data&0x07;
		data=data<<1;
		PORTB=PORTB|(data&0xF0);

		PORTA=select[i];
		DelayMs(3);
	}
} 
}
}