Embedded C program for Timer programming ISR based buzzer on/off using PIC18F in MPLAB IDE

Program:

#include <xc.h>
int c=0;
void __interrupt() tmr1_isr(){
    c++;
    if(c==1000){
        c=0;
        LATAbits.LATA5=~LATAbits.LATA5;
    }
    TMR1IF=0;
    TMR1=53536;
}
void main(void) {
    T1CON = 0x80;         
    
    TRISAbits.TRISA5=0;
    LATAbits.LATA5=0;
    TMR1IE=1;
    TMR1IF=0;
    GIE=1;        
    PEIE=1;
  
   
        TMR1=53536;
        TMR1ON=1;
        while(1);

    return;
}

Output:

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