File content as of revision 4:82cd644fef51:

#include "mbed.h"
#include "Stepper.h"
#include "string"
DigitalIn optic(D5);
Stepper mot(D3,D2); //(PUL+,DIR+)
DigitalOut en(D4);
Serial pc(USBTX, USBRX);
DigitalOut myled(LED1);
DigitalOut myled2(LED2);
DigitalOut myled3(LED3);
DigitalOut myled4(LED4);
int main(){
    int count = 0;
    int old_optic=0;
    int new_optic;
    optic.mode(PullDown);
    wait(0.01);
//int positionnum = 0;
//int slot = 0;
//en = 1; // stepper motor off
    while(1) {
        new_optic = optic;
        //if (new_optic!= old_optic){ 
        pc.printf("\new optic:%ld",new_optic);
        wait(.5);
        if ((new_optic==1) && (old_optic==0)){
        myled4 = count & 0x01;
        myled3 = (count & 0x02)>>1;
        myled2 = (count & 0x04)>>2;
        myled = (count & 0x08)>>3;
        count++;
        pc.printf("\ncount:%ld",count);
        }
          
        old_optic = new_optic;
        wait(.5);
        pc.printf("\ncount:%ld",count);
    
   }
}

/*while(1)
  {
        pc.printf("\n\n\nEnter desired position: ");
        pc.scanf("%d",&slot); 
        
        new_optic = optic;
        while (slot!=positionnum){
        
        if (slot>positionnum){
        en = 0;
        mot.setSpeed(500);
        mot.rotate(1);
        }
        
        
        //while(optic == 0)
        //{
        //wait(1);
        //mot.goesTo(steps+25); //go to absolute step position
        //while(!mot.stopped());
        //steps = mot.getPosition();
        //pc.printf("\nNot in Position", steps);
        //}
        pc.printf("\nIn Position");
        en = 1; //disable the motor and driver
        //if (tickcount<steps)
        //{
        //mot.goesTo(steps+25);
        //while(!mot.stopped());
        //steps = mot.getPosition();
        //pc.printf("\nNot in Position", steps);
        //}
        //if (tickcount>steps)
        //{
        //mot.goesTo(steps-25);
        //while(!mot.stopped());
        //steps = mot.getPosition();
        //pc.printf("\nNot in Position", steps);
        //}
    }
}*/