File content as of revision 2:1af13a8a8275:

/**
 * @brief       HX711.h
 * @details     24-Bit Analog-to-Digital Converter (ADC) for Weigh Scales.
 *              Header file.
 *
 *
 * @return      NA
 *
 * @author      Manuel Caballero
 * @date        11/September/2017
 * @version     11/September/2017    The ORIGIN
 * @pre         NaN.
 * @warning     NaN
 * @pre         This code belongs to Nimbus Centre ( http://www.nimbus.cit.ie ).
 */
#ifndef HX711_H
#define HX711_H

#include "mbed.h"


/**
    Example:

[todo]
*/


/*!
 Library for the HX711 24-Bit Analog-to-Digital Converter (ADC) for Weigh Scales.
*/
class HX711
{
public:
    /**
      * @brief   CHANNELS & GAIN
      */
    typedef enum {
        CHANNEL_A_GAIN_128      =   0,              /*!<  Channel A 128 Gain.                                               */
        CHANNEL_B_GAIN_32       =   1,              /*!<  Channel B 32 Gain.                                                */
        CHANNEL_A_GAIN_64       =   2               /*!<  Channel A 64 Gain.                                                */
    } HX711_channel_gain_t;



    /**
      * @brief   READY/BUSY DATA
      */
    typedef enum {
        HX711_DATA_BUSY         =   0,              /*!<  HX711 data is NOT ready to be read.                                */
        HX711_DATA_READY        =   1               /*!<  HX711 data is ready to be read.                                    */
    } HX711_data_output_status_t;



    /**
      * @brief   SCALE
      */
    typedef enum {
        HX711_SCALE_kg          =   0,              /*!<  HX711 Scale in kg.                                                 */
        HX711_SCALE_g           =   1,              /*!<  HX711 Scale in  g.                                                 */
        HX711_SCALE_mg          =   2,              /*!<  HX711 Scale in mg.                                                 */
        HX711_SCALE_ug          =   3               /*!<  HX711 Scale in ug.                                                 */
    } HX711_scale_t;




#ifndef VECTOR_STRUCT_H
#define VECTOR_STRUCT_H
    typedef struct {
        float myRawValue_WithCalibratedMass;
        float myRawValue_WithoutCalibratedMass;
        float myRawValue_TareWeight;
        uint32_t myRawValue;
    } Vector_count_t;
    
    typedef struct {
        float myMass;
    } Vector_mass_t;
#endif



    /**
      * @brief   INTERNAL CONSTANTS
      */
#define HX711_PIN_HIGH           0x01               /*!<   Pin 'HIGH'                                                       */
#define HX711_PIN_LOW            0x00               /*!<   Pin 'LOW'                                                        */
      
    typedef enum {
        HX711_SUCCESS     =       0,
        HX711_FAILURE     =       1,
    } HX711_status_t;




    /** Create an HX711 object connected to the specified pins.
      *
      * @param pd_sck           HX711 Power down control (high active) and serial clock input
      * @param dout             HX711 Serial data output
      */
    HX711 ( PinName PD_SCK, PinName DOUT );

    /** Delete HX711 object.
     */
    ~HX711();

    /** It performs an internal reset.
     */
    HX711_status_t  HX711_Reset                         ( void );
    
    /** It puts the device into power-down mode.
     */
    HX711_status_t  HX711_PowerDown                     ( void );
    
    /** It sets both the channel and the gain for the next measurement.
     */
    HX711_status_t  HX711_SetChannelAndGain             ( HX711_channel_gain_t myChannel_Gain );
    
    /** It gets both the channel and the gain for the current measurement.
     */
    HX711_channel_gain_t  HX711_GetChannelAndGain       ( void );
    
    /** It reads raw data from the device.
     */
    HX711_status_t  HX711_ReadRawData                   ( HX711_channel_gain_t myChannel_Gain, Vector_count_t* myNewRawData, uint32_t myAverage );
    
    /** It reads raw data with an user-specified calibrated mass.
     */
    HX711_status_t  HX711_ReadData_WithCalibratedMass   ( HX711_channel_gain_t myChannel_Gain, Vector_count_t* myNewRawData, uint32_t myAverage );
    
    /** It reads raw data without any mass.
     */
    HX711_status_t  HX711_ReadData_WithoutMass          ( HX711_channel_gain_t myChannel_Gain, Vector_count_t* myNewRawData, uint32_t myAverage );
    
    /** It reads raw data without any mass after the system is calibrated.
     */
    HX711_status_t  HX711_SetAutoTare                   ( HX711_channel_gain_t myChannel_Gain, Vector_count_t* myNewRawData, float myTime );
    
    /** It calculates scaled data.
     */
    Vector_mass_t  HX711_CalculateMass                  ( Vector_count_t* myNewRawData, float myCalibratedMass, HX711_scale_t myScaleCalibratedMass );




private:    
    DigitalOut              _PD_SCK;
    DigitalIn               _DOUT;
    HX711_channel_gain_t    _HX711_CHANNEL_GAIN;
    HX711_scale_t           _HX711_SCALE;
    float                   _HX711_USER_CALIBATED_MASS;
};

#endif