hsc.h

#ifndef _AVRIO_HSC_H_
#define _AVRIO_HSC_H_
#include <avrio/defs.h>

__BEGIN_C_DECLS
/* ========================================================================== */

/* macros =================================================================== */
#define PSI_TO_PA(_psi) ((double)(_psi)*6894.76f)
#define PSI_TO_HPA(_psi) ((double)(_psi)*68.9476f)

/* constants ================================================================ */
typedef enum {
  HSC_SPI,  
  HSC_TWI   
} eHscBus;

typedef enum {
  HSC_SUCCESS = 0,  
  HSC_COMMAND_MODE = -1, 
  HSC_STALE_DATA = -2, 
  HSC_DIAGNOSTIC = -3,
  HSC_TWI_ERROR = -4
} eHscStatus;

#define HSC_DEFAULT_TWIADDR (0x28)

/* types ==================================================================== */
typedef void (*vHscSpiSelect)(bool);

typedef void (*vHscSpiInit)(void);

/* structures =============================================================== */
typedef struct xHscRaw {

  uint16_t usPress; 
  uint16_t usTemp;  
} xHscRaw;

typedef struct xHscValue {

  double dPress;  
  double dTemp;   
} xHscValue;

typedef struct xHscSensor {

  double dPressMin; 
  double dPressMax; 
  eHscBus eBus; 
  union {
    uint8_t ucTwiAddr;
    struct {
      vHscSpiInit vInit; 
      vHscSpiSelect vSelect; 
    };
  };
} xHscSensor;

/* internal public functions ================================================ */
int iHscGetValue (xHscSensor *pSensor, xHscValue *pValue);

void vHscRawToValue (xHscSensor *pSensor, const xHscRaw *pRaw, xHscValue *pValue);

int iHscGetRaw (xHscSensor *pSensor, xHscRaw *pRaw);

#  if defined(__DOXYGEN__)
/*
 * __DOXYGEN__ defined
 * Partie documentation ne devant pas être compilée.
 * =============================================================================
 */

int
iHscInitSpiSensor (xHscSensor *pSensor,  double dPressMin, double dPressMax,
                                vHscSpiInit vInit, vHscSpiSelect vSelect);
int
iHscInitTwiSensor (xHscSensor *pSensor,  double dPressMin, double dPressMax,
                                uint8_t ucTwiAddr);
#  else
/*
 * __DOXYGEN__ not defined
 * Partie ne devant pas être documentée.
 * =============================================================================
 */

/* internal inline functions ================================================ */

// -----------------------------------------------------------------------------
INLINE int
iHscInitSpiSensor (xHscSensor *pSensor,  double dPressMin, double dPressMax,
                                vHscSpiInit vInit, vHscSpiSelect vSelect) {

  pSensor->dPressMin = dPressMin;
  pSensor->dPressMax = dPressMax;
  pSensor->vInit = vInit;
  pSensor->vSelect = vSelect;
  pSensor->eBus = HSC_SPI;

  if (pSensor->vInit)
    pSensor->vInit();
  return 0;
}

// -----------------------------------------------------------------------------
INLINE int
iHscInitTwiSensor (xHscSensor *pSensor,  double dPressMin, double dPressMax,
                                uint8_t ucTwiAddr) {

  pSensor->dPressMin = dPressMin;
  pSensor->dPressMax = dPressMax;
  pSensor->eBus = HSC_TWI;
  pSensor->ucTwiAddr = ucTwiAddr;
  return 0;
}
// -----------------------------------------------------------------------------
#  endif /* __DOXYGEN__ not defined */

/* ========================================================================== */
__END_C_DECLS
#endif  /* _AVRIO_HSC_H_ not defined */