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39 lines
727 B
C++
39 lines
727 B
C++
#ifndef RATEMETER_H
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#define RATEMETER_H
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#include <cstdint>
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#include "debouncer.h"
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class RateMeter {
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public:
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RateMeter();
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void onInterrupt();
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void tick(millis_t delta);
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void expire();
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uint16_t delta() const;
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// Hall sensor edges per seconds.
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// stopped: 0
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// really slow => ~3
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// medium => ~30
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// fast => < 300
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// max => 1000
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float rate() const;
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private:
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uint32_t lastTime;
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// really Range, emperically:
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// fast => < 5_000 us,
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// medium => 20_000 - 40_000 us
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// really slow => 250_000 us
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uint32_t averageDelta;
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static const uint16_t CUTOFF_MS = 1000;
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// Cut off after some seconds to prevent multiple timestamp overflow (~70 mins)
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Timeout<uint16_t, CUTOFF_MS> cutoff;
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};
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#endif
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