34 lines
621 B
C++
34 lines
621 B
C++
// Copyright 2017 David Conran
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#include "IRtimer.h"
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#ifndef UNIT_TEST
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#include <Arduino.h>
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#endif
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// This class performs a simple time in useconds since instantiated.
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// Handles when the system timer wraps around (once).
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IRtimer::IRtimer() {
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reset();
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}
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void IRtimer::reset() {
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#ifndef UNIT_TEST
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start = micros();
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#else
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start = 0;
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#endif
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}
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uint32_t IRtimer::elapsed() {
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#ifndef UNIT_TEST
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uint32_t now = micros();
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#else
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uint32_t now = 0;
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#endif
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if (start <= now) // Check if the system timer has wrapped.
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return now - start; // No wrap.
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else
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return UINT32_MAX - start + now; // Has wrapped.
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}
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