File content as of revision 1:189d6f2b0612:

#ifndef _SPTEPSensor_H_
#define _SPTEPSensor_H_

#include "mbed.h"
/**
 * Reading and nulling the SPTE pressure sensor made by festo (analog input)
 */

class SPTEPressureSensor {
public:

    /**
     * @param pin_a_in PinName of analog input
     * @param offset of analog value (calibration data)
     * @param factor multiplication factor for analog value (calibration data)
     */
    SPTEPressureSensor(PinName pin_a_in, float offset, float factor) :
        analog_in_(pin_a_in),
        kOffset_(offset),
        kFactor_(factor)
    {
    }

    /**
     * @return unscaled analog input value
     */
    float getPressureRaw() 
    {
        return analog_in_.read();
    }

    /**
     * @return force value kOffset_ + kFactor_ * getPressureRaw();
     */
    float getPressure() 
    {
        return kOffset_ + kFactor_ * getPressureRaw();
    }
    
    /**
     * sets pressure scaling offset so that current output is pressure zero
     */
    void nullPressure()
    {
        kOffset_ = kOffset_ - getPressure();
        return;        
    }
    
    /**
     * @return ffset of analog value
     */
    float get_offset() { return kOffset_; }
    
    /**
     * @return factor multiplication factor for analog value
     */
    float get_factor() { return kFactor_; }


private:
    AnalogIn analog_in_;
    
    float kOffset_;
    const float kFactor_;
};

#endif