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21 lines
436 B
21 lines
436 B
#include "utils.h" |
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#include <Arduino.h> |
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namespace utils |
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{ |
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unsigned long IRAM_ATTR elapsed(unsigned long from, unsigned long to) |
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{ |
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if(to >= from) |
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{ |
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return to - from; |
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} |
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else |
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{ |
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// if the counter overflowed, this computes the real duration |
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// of course it won't work if the counter made a "full turn" or more |
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const unsigned long biggestValue = (unsigned long)-1; |
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return (biggestValue - from) + to + 1; |
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} |
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} |
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}
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