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Dependencies:   ESP8266 Servo TextLCD mbed

Fork of ACS712HelloWorldDemo by m b

ACS712.h

Committer:
nyengele
Date:
2016-03-13
Revision:
2:2b5233355986
Parent:
1:4f9effb20c29
Child:
3:9cae7baf7ccd

File content as of revision 2:2b5233355986:

#include <mbed.h>

class ACS712 { 
    
    public:
        ACS712(PinName _pin, float voltDivRatio = 1, short type = 5);
        
        float read();
        float operator=(ACS712&);
        operator float() { return read(); }
        
    private:
        AnalogIn sensor;
        float translate(float);
        float ratio;
        short type;

};

ACS712::ACS712(PinName _pin, float voltDivRatio, short type) : sensor(_pin){
    ratio = voltDivRatio;
    this.type = type;    
}

float ACS712::translate(float val){
    switch(type){
        case 5: 
            return (val*ratio - 2.5*ratio)/(.185*ratio);
        break;
        case 20:
            return (val*ratio - 2.5*ratio)/(.1*ratio);
        break;
        case 30:
            return (val*ratio - 2.5*ratio)/(.066*ratio);
        break;
        default:
            return 999;
        break;

    }
}


float ACS712::read(){
    return ACS712::translate(sensor * 3.3);   
}

ACS712& ACS712::operator=(ACS712& rhs){
    sensor = rhs.sensor;
    ratio = rhs.ratio;
    type = rhs.type;
    return this;
}