sensor.h

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#ifndef SENSOR_SENSOR_H_
#define SENSOR_SENSOR_H_
 
#include <stdbool.h>
#include <stdint.h>
 
#include "../rl_file.h"
 
#define MAX_MESSAGE_LENGTH 1000
 
#ifndef I2C_BUS_FILENAME
#define I2C_BUS_FILENAME "/dev/i2c-2"
#endif
 
#define SENSOR_REGISTRY_SIZE 5
 
#define SENSOR_NAME_LENGTH (RL_FILE_CHANNEL_NAME_LENGTH)
 
struct rl_sensor {
    char name[SENSOR_NAME_LENGTH];
    int identifier;
    int channel;
    rl_unit_t unit;
    int32_t scale;
    int (*init)(int);
    void (*deinit)(int);
    int (*read)(int);
    int32_t (*get_value)(int, int);
};
 
typedef struct rl_sensor rl_sensor_t;
 
extern const rl_sensor_t SENSOR_REGISTRY[SENSOR_REGISTRY_SIZE];
 
int sensors_init(void);
 
void sensors_deinit(void);
 
int sensors_open_bus(void);
 
int sensors_close_bus(int bus);
 
int sensors_get_bus(void);
 
int sensors_init_comm(uint8_t device_address);
 
int sensors_scan(bool sensor_available[SENSOR_REGISTRY_SIZE]);
 
int sensors_read(int32_t *const sensor_data,
                 bool const sensor_available[SENSOR_REGISTRY_SIZE]);
 
void sensors_close(bool const sensor_available[SENSOR_REGISTRY_SIZE]);
 
#endif /* SENSOR_SENSOR_H_ */