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105 lines
1.7 KiB
C++
105 lines
1.7 KiB
C++
//
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// FILE: MAX471.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.1
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// DATE: 2024-01-30
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// PURPOSE: Arduino library for MAX471 current sensor.
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// URL: https://github.com/RobTillaart/MAX471_RT
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#include "MAX471.h"
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/////////////////////////////////////////////////////////////////////////////
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//
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// CONSTRUCTOR
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//
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MAX471::MAX471(uint8_t currentPin, uint8_t voltagePin)
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{
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_currentPin = currentPin;
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_voltagePin = voltagePin;
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_signPin = 255;
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_current = 0;
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_voltage = 0;
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}
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MAX471::MAX471(uint8_t currentPin, uint8_t voltagePin, uint8_t signPin)
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{
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_currentPin = currentPin;
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_voltagePin = voltagePin;
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_signPin = signPin;
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_current = 0;
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_voltage = 0;
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pinMode(_signPin, INPUT_PULLUP);
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}
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void MAX471::begin(float maxVoltage, uint16_t maxSteps)
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{
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_units = maxVoltage / maxSteps;
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}
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float MAX471::readCurrent(uint8_t times)
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{
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if (times == 0) times = 1;
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uint8_t _times = times;
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float sum = 0;
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while (_times--)
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{
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sum += analogRead(_currentPin) ;
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}
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_current = sum * _units / times;
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if (_signPin != 255)
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{
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if (digitalRead(_signPin) == HIGH)
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{
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_current *= -1;
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}
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}
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return _current;
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}
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float MAX471::readCurrentMilliAmpere(uint8_t times)
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{
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return readCurrent(times) * 1000;
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}
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float MAX471::readVoltage(uint8_t times)
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{
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if (times == 0) times = 1;
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uint8_t _times = times;
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float sum = 0;
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while (_times--)
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{
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sum += analogRead(_voltagePin);
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}
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_voltage = sum * _units / times;
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return _voltage;
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}
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float MAX471::readVoltageMilliVolts(uint8_t times)
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{
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return readVoltage(times) * 1000;
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}
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float MAX471::calcPower()
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{
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return _current * _voltage;
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}
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float MAX471::calcPowerMilliWatt()
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{
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return _current * _voltage * 1000;
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}
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// -- END OF FILE --
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