pic16f frq counter in .asm

include <p16F690.inc>

    counter EQU 0x20
    counter2 EQU 0x22

    cblock  0x24
    ;counter
    ;counter2
    counter3
    frequency
    status_temp
    w_temp
    endc


    org     0x00
    goto    SETUP

    org     0x04
    movwf   w_temp
    movf    STATUS, w
    movwf   status_temp

    banksel PIR1
    btfss   PIR1, TMR1IF
    goto    CK_CAP

    bcf     PIR1, TMR1IF
    movlw   0x0B
    movwf   TMR1H
    movlw   0xDC
    movwf   TMR1L

    movf    counter2, w
    movwf   frequency
    clrf    counter2
    retfie

    CK_CAP:
    btfss   PIR1, CCP1IF
    goto    END_ISR

    bcf     PIR1, CCP1IF
    incf    counter2

    END_ISR:
    movf    status_temp, w
    movwf   STATUS
    swapf   w_temp, f
    swapf   w_temp, w
    retfie


    SETUP:
    banksel OSCCON
    movlw   0x70
    movwf   OSCCON
    ;   TMR1 Initialization
    banksel T1CON
    movlw   0x21
    movwf   T1CON
    bcf     PIR1, TMR1IF
    movlw   0x0B
    movwf   TMR1H
    movlw   0xDC
    movwf   TMR1L
    banksel PIE1
    bsf     PIE1, TMR1IE
    movlw   0xC0
    movwf   INTCON

    banksel CCP1CON
    bcf     CCP1CON, CCP1M3
    bsf     CCP1CON, CCP1M2
    bcf     CCP1CON, CCP1M1
    bsf     CCP1CON, CCP1M0

    clrf    counter
    clrf    counter2
    clrf    counter3

    banksel PIE1
    bsf     PIE1, CCP1IE
    bsf     INTCON, GIE
    bsf     INTCON, PEIE
    movlw   0xC0
    movwf   INTCON

    clrf    PORTB
    clrf    PORTC
    banksel TRISB
    clrf    TRISB
    movlw   0x04
    movwf   TRISC

    banksel ANSEL
    clrf    ANSEL
    clrf    ANSELH

    MAIN:

    goto    MAIN

    end