ad799x.h

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/***************************************************************************/
#ifndef __AD799X_H__
#define __AD799X_H__
 
/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/
#include <stdint.h>
#include "no_os_i2c.h"
 
/******************************************************************************/
/******************************** AD799x **************************************/
/******************************************************************************/
 
/* Configuration Register definition. */
#define AD799X_CHANNEL(ch)        ((1 << ch) << 4)
#define AD799X_REF_SEL            (1 << 3)
#define AD799X_FLTR       (1 << 2)
#define AD799X_BIT_TRIAL_DELAY    (1 << 1)
#define AD799X_SAMPLE_DELAY   (1 << 0)
 
/******************************************************************************/
/*************************** Types Declarations *******************************/
/******************************************************************************/
 
/* Supported devices */
enum ad799x_type {
    AD7991,
    AD7995,
    AD7999
};
 
struct ad799x_dev {
    /* I2C */
    struct no_os_i2c_desc   *i2c_desc;
    /* Device Settings */
    uint8_t         bits_number;
};
 
struct ad799x_init_param {
    /* I2C */
    struct no_os_i2c_init_param     i2c_init;
    /* Device Settings */
    enum ad799x_type    part_number;
};
 
/******************************************************************************/
/************************ Functions Declarations ******************************/
/******************************************************************************/
 
int8_t ad799x_init(struct ad799x_dev **device,
           struct ad799x_init_param init_param);
 
int32_t ad799x_remove(struct ad799x_dev *dev);
 
void ad799x_set_configuration_reg(struct ad799x_dev *dev,
                  uint8_t register_value);
 
void ad799x_get_conversion_result(struct ad799x_dev *dev,
                  int16_t* conv_value,
                  int8_t* channel);
 
float ad799x_convert_to_volts(struct ad799x_dev *dev,
                  int16_t raw_sample,
                  float v_ref);
 
#endif /* __AD799X_H__ */