N K / Mbed 2 deprecated priustroller_2

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Dependencies:   mbed

Fork of priustroller by Bayley Wang

currentsensors.cpp

Committer:
nki
Date:
2015-03-04
Revision:
6:99ee0ce47fb2
Parent:
1:1f58bdcf2956
Child:
7:76d6ceb23e0d

File content as of revision 6:99ee0ce47fb2:

#include "includes.h"
#include "sensors.h"

AnalogCurrentSensor::AnalogCurrentSensor(PinName pin, float volts_per_amp) {
    _in = new AnalogIn(pin);
    _volts_per_amp = volts_per_amp;
    Zero();
}

void AnalogCurrentSensor::Zero() {
    float mean = 0;
    for(int i = 1; i<=1000; i++){
        mean = 0.1f*((float) *_in) + 0.9f*mean;
    }
    _zero_level = mean;
}

float AnalogCurrentSensor::GetCurrent() {
    return ((float) *_in - _zero_level) * 3.3f / _volts_per_amp;
}