ardupilot/libraries/AP_TemperatureSensor/TSYS01.h

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/*
* I2C driver for Measurement Specialties MEAS TSYS01 digital temperature sensor
*/
#pragma once
#include <AP_HAL/AP_HAL.h>
#include <AP_HAL/Semaphores.h>
#include <AP_HAL/Device.h>
#define TSYS01_ADDR 0x77
class TSYS01 {
public:
bool init(uint8_t bus);
float temperature(void) { return _temperature; } // temperature in degrees C
bool healthy(void) { // do we have a valid temperature reading?
#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
return true;
#endif
return _healthy;
}
AP_HAL::OwnPtr<AP_HAL::Device> _dev;
private:
#if CONFIG_HAL_BOARD == HAL_BOARD_SITL
float _temperature = 42.42; // degrees C
#else
float _temperature; // degrees C
#endif
bool _healthy; // we have a valid temperature reading to report
uint16_t _k[5]; // internal calibration for temperature calculation
bool _reset(void); // reset device
bool _read_prom(void); // read (relevant) internal calibration registers into _k
bool _convert(void); // begin an ADC conversion (min:7.40ms typ:8.22ms max:9.04ms)
uint32_t _read_adc(void);
uint16_t _read_prom_word(uint8_t word);
void _timer(void); // update the temperature, called at 20Hz
void _calculate(uint32_t adc); // calculate temperature using adc reading and internal calibration
};