sensor_dev.h

#ifndef SENSORDEV_H
#define SENSORDEV_H
 
typedef int (*SENSORCALL)(uint8_t sensorindex);
typedef int (*SENSORREADCALL)(uint8_t sensorindex, uint8_t *error);   //error=0: OK
typedef void (*SENSORSTATUS) (uint8_t sensorindex, char *buf, int bufsize, int *status);
typedef struct sensordev {
  uint8_t                       cfg_flags;              /* see SENSOR_CONFIG_FLAG_XXX below */
  SENSORCALL            power_on;               /* power up the sensor. return 0 if ok */
  SENSORCALL            power_down;             /* power down the sensor. return 0 if ok */
  SENSORCALL            get_reading_size;       /* return size in uint8_ts [1..2] of a single measurement */
  SENSORREADCALL        get_reading;            /* return a reading (mandatory) - called within an IRQ! (see notes above) */
  SENSORSTATUS          get_status;             /* status to buf in human-readable format plus status value specific to this sensor. status==0 defined as OK */
  const char *const     name;                   /* ow1:ds18b20 etc.. (mandatory, unique)*/
  const char *const     type;                   /* temperature, current, ... */
  const char *const     unit;                   /* celsius, ampere, volt... */
  const char *const     unit_prefix;            /* deci, milli, micro etc.. */
  uint8_t                       sensorindex;            /* some sensors might be called several times with different index. This is specific to the sensor */
  uint8_t                       pad;
} _sensordev;
 
typedef struct sensorruntime {
  const struct sensordev *      sensor;         /* pointer to the sensor in question */
  uint8_t *                     buf;            /* pointer to data buf */
  uint16_t                      bufsize;        /* size of buf */
  uint16_t                      bytesinbuf;     /* byte used */
  uint16_t                      values;         /* counts how many values have been read */
  uint16_t                      valuesize;      /* size of each value, as determined when runtime was created */
  int                           runctr;         /* counts how many millis have actually passed between reads */
  long                          runsecs;        /* secondctr for submission */
  uint8_t                       flags;          /* current internal flags for this device */
  union {
    uint32_t last_value_uint32;
    uint16_t last_value_uint16;
    uint8_t last_value_uint8;
  };
} _sensorruntime;
 
 
#endif