adc.h

#ifndef _CHIPIO_ADC_H_
#define _CHIPIO_ADC_H_

#include <chipio/chipio.h>

#ifdef __cplusplus
  extern "C" {
#endif
/* ========================================================================== */

/* constants ================================================================ */
typedef enum {
  eAdcRefExternal  = 0x00, 
  eAdcRefVcc       = 0x01, 
  eAdcRefInternal  = 0x03, 
  eAdcRefUnknown   = -1,
} eAdcRef;

typedef enum {
  eAdcDiv2        = 2, 
  eAdcDiv4        = 4, 
  eAdcDiv8        = 8, 
  eAdcDiv16       = 16, 
  eAdcDiv32       = 32, 
  eAdcDiv64       = 64, 
  eAdcDiv128      = 128, 
  eAdcDivUnknown  = -1
} eAdcDiv;


/* structures =============================================================== */

typedef struct xChipIoAdc xChipIoAdc;

/* internal public functions ================================================ */

xChipIoAdc * xChipIoAdcOpen (xChipIo * xChip);

void vChipIoAdcClose (xChipIoAdc * xAdc);

int iChipIoAdcRead (unsigned input, xChipIoAdc * xAdc);

eAdcRef eChipIoAdcRef (xChipIoAdc * xAdc);

eAdcRef eChipIoAdcSetRef (eAdcRef eRef, xChipIoAdc * xAdc);

eAdcDiv eChipIoAdcDiv (xChipIoAdc * xAdc);

eAdcDiv eChipIoAdcSetDiv (eAdcDiv eDiv, xChipIoAdc * xAdc);


#if defined(__DOXYGEN__)
/* macros =================================================================== */
#define ADC_VALUE(MEASUREMENT,FULL_SCALE)

#define ADC_MEASUREMENT(VALUE,FULL_SCALE)

#else /* __DOXYGEN__ not defined */
/* ========================================================================== */

/* macros =================================================================== */
#define ADC_VALUE(_MEASUREMENT,_FULL_SCALE) \
  ((uint16_t)(((_MEASUREMENT)*1024.0)/(_FULL_SCALE)))

#define ADC_MEASUREMENT(_VALUE,_FULL_SCALE) \
  ((((double)(_VALUE))*((double)(_FULL_SCALE)))/1024.0)

#endif /* __DOXYGEN__ not defined */

/* ========================================================================== */
#ifdef __cplusplus
  }
#endif
#endif /* _CHIPIO_ADC_H_ */