File content as of revision 2:57c57267b1da:

#include "a4988.h"
#include "mbed.h"
Stepper::Stepper(PinName _en, PinName _stepPin, PinName _direction):en(_en),
    stepPin(_stepPin),
    direction(_direction)
{
    
}
 
void Stepper::step(int dir, int frequency ,volatile int _remain)
{
    if (dir == 1) {
        direction = 0;
    } else if (dir == 0) {
        direction = 1;
    }
    else 
    {
        return;
    }
    remain = _remain;
    step_ticker.attach(callback(this, &Stepper::step_control),0.5/frequency);
}
 
void Stepper::enable()
{
    en = 0;
}
 
void Stepper::disable()
{
    en = 1;
}

void Stepper::step_control()
{
        if(remain <= 0)
        {    
            step_ticker.detach();     
            return;
        }
        
                if(stepPin){
                        stepPin = 0; //STEP 1->0
                        remain--;
                }else{
                        stepPin = 1; //STEP 0->1
                }
}

void Stepper::longrun(int dir, int frequency)
{
    if (dir == 1) {
        direction = 0;
    } else if (dir == 0) {
        direction = 1;
    }
    else 
    {
        return;
    }
    step_ticker.attach(callback(this, &Stepper::run_control),0.5/frequency);
}

void Stepper::run_control()
{
                if(stepPin){
                        stepPin = 0; //STEP 1->0
                        remain--;
                }else{
                        stepPin = 1; //STEP 0->1
}
}
void Stepper::stoprun()
{
    step_ticker.detach();
}