Hi,

Please have a look at the below code. The chip is 16f84a. The osilator is
selected as xt and the wdt is disabled. There is a button on RB0 to trigger
the interrupt and there is a motor driver on pins RB1 and RB2.
What I want to do is to count the button presses and change the direction of
the motor when It reaches to the specified values (max and min)
I will be very happy if someone can help me in the project.
The hi-tech C code (lite version):

#include <pic.h>
#define PIC_CLK 4000000
#include <delay.c>
#define CP_off|=0x3FFF//copy protect off

#define OUTPUT 0;
#define INPUT 1;

unsigned char max;
unsigned char min;
unsigned char pos=9;
unsigned char dir=1;


main(){

// init
        TRISB=49;
        PORTB=0;

        max=20;
        min=10;

        INTE=1;
        GIE=1;

        for(;;){
                if (pos>max) {
                        dir=0;
                        RB1=0;//motor left
                        RB2=1;//motor left
                }
                if (pos<min) {
                        dir=1;
                        RB1=1;//motor right
                        RB2=0;//motor right
                }


        }//for

}//main

static void interrupt isr(void){

if (INTF) {
        if (dir==0){pos--;}
        if (dir==1){pos++;}
        INTF=0;
}//if

}

Regards,
Nuri Erginer

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