bmp280.h

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#ifndef NEXUS_COMPONENTS_BMP280_H
#define NEXUS_COMPONENTS_BMP280_H
#include "nexus/core/time.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    void* context;
    nx_result_t (*exchange)(void*, const uint8_t*, uint8_t*, size_t,
                            nx_time_us_t deadline);
    nx_clock_t clock;
} nx_bmp280_transport_port_t;

typedef struct {
    uint16_t t1;
    int16_t t2;
    int16_t t3;
    uint16_t p1;
    int16_t p2;
    int16_t p3;
    int16_t p4;
    int16_t p5;
    int16_t p6;
    int16_t p7;
    int16_t p8;
    int16_t p9;
} nx_bmp280_calibration_t;

typedef struct {
    int32_t centi_celsius;
    uint32_t pressure_pa;
} nx_bmp280_sample_t;

typedef struct {
    nx_bmp280_transport_port_t transport;
    nx_bmp280_calibration_t calibration;
    nx_time_us_t deadline;
    nx_time_us_t earliest_ready;
    bool initialized;
    bool measuring;
} nx_bmp280_t;

nx_result_t nx_bmp280_parse_calibration(const uint8_t* bytes, size_t length,
                                        nx_bmp280_calibration_t* calibration);
nx_result_t nx_bmp280_compensate(const nx_bmp280_calibration_t* calibration,
                                 uint32_t raw_temperature,
                                 uint32_t raw_pressure,
                                 nx_bmp280_sample_t* sample);
nx_result_t nx_bmp280_init(nx_bmp280_t* device,
                           nx_bmp280_transport_port_t transport,
                           nx_time_us_t deadline);
nx_result_t nx_bmp280_begin(nx_bmp280_t* device, nx_time_us_t deadline);
nx_result_t nx_bmp280_poll(nx_bmp280_t* device, nx_bmp280_sample_t* sample);
void nx_bmp280_stop(nx_bmp280_t* device);
 
#ifdef __cplusplus
}
#endif
 
#endif /* NEXUS_COMPONENTS_BMP280_H */