Helpful change for frequency counter using PIC 16F877A in ccs c compiler

[john120]

Can some body plz help me to modify the following codes for counting the frequency up to 2Mhz of a square wave and sine wave:

#include <16f877a.h>
#use delay(clock=20M)
#include <lcd420.c>
#include <LCD_D.h>
#fuses hs,nowdt,nocpd,nolvp,noprotect

#byte portc=0x07
#bit led=portc.4

void LCD_D();
unsigned int16 value;

void main()
{
set_tris_c(0x00);
led=1;
delay_ms(500);
LCD_D();
delay_ms(50);
while(1)
{
set_timer1(0);
setup_timer_1(t1_external | T1_DIV_BY_1);
delay_ms(1000); // in protues, should be 1000/3

setup_timer_1(T1_DISABLED);
value=get_timer1();
lcd_gotoxy(11,4);
printf(lcd_putc,"%LU HZ ",value);
led=!led;
}
}

I got those codes from http://www.pic-tronics.com/Frequency-Counter-Using-PIC16F877A.php

Thanks

 

[jayanth.devarayanadurga]

Timer1 is a 16-bit timer. Max value is 65535. Try using CCP1 pin in Capture mode to find the period and frequency of square wave.

 

[john120]

Timer1 is a 16-bit timer. Max value is 65535. Try using CCP1 pin in Capture mode to find the period and frequency of square wave.

Yeah the Maximum with Timer1 is 65535 but;I solved the problem buy chaning the delay time and the prescaler for Timer1 see the following:
setup_timer_1(T1_EXTERNAL|T1_DIV_8)

then the delay has been changed to 250ms.