package com.henrypump.io;

import mraa.Dir;
import mraa.Gpio;

import java.io.IOException;
import java.time.Instant;

/**
 * Created by patrickjmcd on 6/19/17.
 */
public class AnalogOut {
    public int channel;
    public int rawValue;
    public double lastValue;
    public Instant lastStored = Instant.EPOCH;
    public double rawMax, rawMin, euMax, euMin;
    private double m, b;


    public AnalogOut(int channel, double rawMin, double rawMax, double euMin, double euMax){
        this.channel = channel;
        this.rawMin = rawMin;
        this.rawMax = rawMax;
        this.euMin = euMin;
        this.euMax = euMax;

        m = (rawMax - rawMin) / (euMax - euMin);
        b = rawMax - m * euMax;

    }


    public int write(MuxSetup mux, double writeVal){
        rawValue = (int) (writeVal * m + b);
        try {
            mux.writeAnalog(channel, rawValue);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return 0;
    }

    public static void main(String[] args){
        try {
            MuxSetup mux = new MuxSetup();
            AnalogOut anOut1 = new AnalogOut(2, 0, 65535, 0, 100);

            for (int i = 0; i < 10; i++) {
                anOut1.write(mux, (double) (i + 1) * 10.0);
                Thread.sleep(1000);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }


}