ardupilot/libraries/AP_OpticalFlow/AP_OpticalFlow_MSP.h

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#pragma once
#include "AP_OpticalFlow.h"
#include <AP_HAL/utility/OwnPtr.h>
#if HAL_MSP_OPTICALFLOW_ENABLED
class AP_OpticalFlow_MSP : public OpticalFlow_backend
{
public:
/// constructor
using OpticalFlow_backend::OpticalFlow_backend;
// initialise the sensor
void init() override {}
// read latest values from sensor and fill in x,y and totals.
void update(void) override;
// get update from msp
void handle_msp(const MSP::msp_opflow_data_message_t &pkt) override;
// detect if the sensor is available
static AP_OpticalFlow_MSP *detect(AP_OpticalFlow &_frontend);
private:
uint64_t prev_frame_us; // system time of last message when update was last called
uint64_t latest_frame_us; // system time of most recent messages processed
Vector2l flow_sum; // sum of sensor's flow_x and flow_y values since last call to update
uint16_t quality_sum; // sum of sensor's quality values since last call to update
uint16_t count; // number of sensor readings since last call to update
Vector2f gyro_sum; // sum of gyro sensor values since last frame from flow sensor
uint16_t gyro_sum_count; // number of gyro sensor values in sum
};
#endif // HAL_MSP_OPTICALFLOW_ENABLED