kopia lustrzana https://github.com/ogre/pizero_tracker
98 wiersze
1.9 KiB
C++
98 wiersze
1.9 KiB
C++
#pragma once
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#include <string>
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#include <chrono>
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#include <limits>
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#include <algorithm>
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// record value, min, max, dV/dT, averaged dV/dT
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//
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// average value
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template<typename T>
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class average_t
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{
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public:
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average_t(size_t max_count, T init_val=0) : sum_(0), count_(0), max_count_(std::max(size_t(1),max_count))
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{
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add(init_val);
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};
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T add(const T& val)
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{
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T diff = get() - val;
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if(count_ == max_count_)
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{
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sum_ = get() * (max_count_-1) + val;
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}
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else
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{
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++count_;
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sum_ += val;
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}
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return diff;
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}
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T get() const
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{
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if(!count_)
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return sum_;
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return T(sum_)/count_;
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}
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// operator double() const { T val = get(); return val; }
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void reset(const T& val)
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{
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sum_ = val;
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count_ = 1;
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}
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private:
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T sum_;
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size_t count_;
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size_t max_count_;
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};
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class dynamics_t
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{
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public:
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using tp = std::chrono::steady_clock::time_point;
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private:
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bool initialised_ = false;
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float val_ = 0; // updated on every add()
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float val_prev_ = 0; // updated after min_dT_
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tp val_prev_timestamp_; // timestamp of val_prev_ update
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float val_min_ = std::numeric_limits<float>::max();
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float val_max_ = -std::numeric_limits<float>::min();
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float dVdT_ = 0;
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average_t<float> dVdT_avg_ = average_t<float>(5);
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public:
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int min_dT_ = 10; // minimum time difference to compute dV/dT. Sample too close to previous will be rejected
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bool initialised() const { return initialised_; }
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void add(const tp timestamp, const float val);
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float val() const { return val_; }
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float min() const { return val_min_; }
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float max() const { return val_max_; }
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float dVdT() const { return dVdT_; }
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float dVdT_avg() const { return dVdT_avg_.get(); }
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std::string str() const;
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std::string json() const;
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};
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