File content as of revision 13:66c8e4ce4ff1:

#include "mbed.h"
#include "AD7791.h"

#ifndef CN0216_H_
#define CN0216_H_

class CN0216
{
public:
  typedef enum
  {
    ZERO_SCALE_CALIBRATION,
    FULL_SCALE_CALIBRATION,
    COMPUTE_GRAM_PER_BIT
  } CalibrationStep_t;

  CN0216(PinName CSAD7791 = D8, PinName MOSI = SPI_MOSI, PinName MISO = SPI_MISO, PinName SCK = SPI_SCK);
  void init(float cal_weight = _DEFAULT_CAL_WEIGHT, uint8_t mode_val = _DEFAULT_MODE_VAL, uint8_t filter_val = _DEFAULT_FILTER_VAL);
  void calibrate(CalibrationStep_t cal);
  float compute_weight(uint32_t data);
  uint32_t read_u32();
  float read_weight()  ;

private:

  const static int _DEFAULT_MODE_VAL = AD7791::MD1 | AD7791::MD0; // POWERDOWN MODE
  const static int _DEFAULT_FILTER_VAL = AD7791::FS0 | AD7791::FS1 | AD7791::FS2;
  const static int _NUMBER_OF_SAMPLES = 50;
  const static int _DEFAULT_CAL_WEIGHT = 1000.0;

  AD7791 ad7791;
  float _cal_weight;
  uint32_t _zero_scale_value;
  uint32_t _full_scale_value;
  float _grams_per_bit;
               
};

#endif