ardupilot/libraries/AP_RangeFinder/AP_RangeFinder_analog.h

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/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
#ifndef __AP_RangeFinder_analog_H__
#define __AP_RangeFinder_analog_H__
#include "RangeFinder.h"
#include <Filter.h>
class AP_RangeFinder_analog
{
public:
// constructor
AP_RangeFinder_analog();
// initialise the rangefinder
void Init(void *adc);
// return distance in centimeters
float distance_cm(void);
// return raw voltage. Used for calibration
float voltage(void);
// return true if the sonar is in the configured range
bool in_range(void);
// return true if enabled
bool enabled(void) { return (bool)_enabled.get(); }
enum RangeFinder_Function {
FUNCTION_LINEAR = 0,
FUNCTION_INVERTED = 1,
FUNCTION_HYPERBOLA = 2
};
static const struct AP_Param::GroupInfo var_info[];
private:
AP_HAL::AnalogSource *_source;
AP_Int8 _pin;
AP_Int8 _stop_pin;
AP_Int16 _settle_time_ms;
AP_Float _scaling;
AP_Float _offset;
AP_Int8 _function;
AP_Int16 _min_distance_cm;
AP_Int16 _max_distance_cm;
AP_Int8 _enabled;
};
#endif // __AP_RangeFinder_analog_H__