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37 lines
725 B
C++
37 lines
725 B
C++
//
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// FILE: AnalogPin.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.00
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// PURPOSE: wrapper class for analogRead
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// URL:
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//
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// Released to the public domain
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//
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#include "AnalogPin.h"
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AnalogPin::AnalogPin(uint8_t pin)
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{
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_pin = pin;
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_prevValue = analogRead(pin);
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}
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uint16_t AnalogPin::read(uint8_t noise)
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{
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uint16_t value = analogRead(_pin);
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if (noise == 0 || abs(value - _prevValue) > noise)
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{
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_prevValue = value;
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}
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return _prevValue;
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}
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uint16_t AnalogPin::readSmoothed(uint8_t alpha)
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{
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alpha = constrain(alpha, 0, 32);
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uint16_t value = analogRead(_pin);
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value = (alpha*_prevValue + (32-alpha)*value)/32;
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_prevValue = value;
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return value;
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}
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// -- END OF FILE --
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