如何结合Java的情节code和Java串行code阅读Arduino的传感器值？ [英] How to combine Java plot code and Java serial code to read Arduino sensor value?

问题描述

进展：code我使用的可以在这里找到：的https：/ /dl.dropbox.com/u/2108381/MyArduinoPlot.java
我希望这有助于理解我的挑战。在此先感谢您的时间。

UPDATE: The code I am using can be found here: https://dl.dropbox.com/u/2108381/MyArduinoPlot.java I hope this helps to understand my challenge. Thanks in advance for your time.

我想从一个Arduino读出传感器值和使用Java库的JFreeChart图表它们。

I would like to read sensor values from an Arduino and chart them using the Java library JFreeChart.

我发现在互联网上的一些code（见下文），现在，我想在code结合起来，绘制一个动态折线图和code在Arduino的值来读取。无论codeS分别做工作，但我被困在结合他们两个。

I found some code on the internet (see below) and now, I would like to combine the code for plotting a dynamic line chart and the code for reading in the Arduino values. Both codes do work separately, but I got stuck in combining them both.

在code密谋动态折线图就是从这里开始（图随机数据）：
的http://dirtyhandsphp.blogspot.in/2012/07/how-to-draw-dynamic-line-or-timeseries.html

The code for plotting a dynamic line chart is from here (plots random data): http://dirtyhandsphp.blogspot.in/2012/07/how-to-draw-dynamic-line-or-timeseries.html

在code在Java中的Arduino读取值就是从这里开始：
http://arduino.cc/playground/Interfacing/Java

The code to read in Arduino values in Java is from here: http://arduino.cc/playground/Interfacing/Java

我认为（在Java中的新手，虽然）的相关部分是在这里：

I assume (newbie in Java, though) that the relevant part is here:

/**
 * Handle an event on the serial port. Read the data and print it.
 */
public synchronized void serialEvent(SerialPortEvent oEvent) {
    if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
        try {
            int available = input.available();
            byte chunk[] = new byte[available];
            input.read(chunk, 0, available);

            // Displayed results are codepage dependent
            System.out.print(new String(chunk));

//              the code I tried

//              String MyValue = new String(chunk);
//              Double Value = Double.valueOf(MyValue); 

        } catch (Exception e) {
            System.err.println(e.toString());
        }
    }
    // Ignore all the other eventTypes, but you should consider the other ones.
}

在这里：

public void actionPerformed(final ActionEvent e) {


//      Original Code

    final double factor = 0.9 + 0.2*Math.random();
    this.lastValue = this.lastValue * factor;

    final Millisecond now = new Millisecond();
    this.series.add(new Millisecond(), this.lastValue);

    System.out.println("Current Time in Milliseconds = " + now.toString()+", Current Value : "+this.lastValue);

//        my code
//        this.series.add(new Millisecond(), Value);


}

我怎样才能让公共同步无效的serialEvent 返回传感器值以及如何将它添加到 this.series.add 部分？

How can I make the public synchronized void serialEvent return the sensor value and how can I add it to the this.series.add part?

我在Java中的新手。

I am a newbie in Java.

任何直接的帮助或联系到其他网站/职位大大AP preciated。感谢您的时间。

Any direct help or linkage to other websites/posts is greatly appreciated. Thanks for your time.

推荐答案

在此例如，一个 javax.swing.Timer中的定期增加了一个新值集在定时器中的的ActionListener 。你会想从外面去做。下面是如何进行的大纲：

In this example, a javax.swing.Timer periodically adds a new value to the dataset in the timer's ActionListener. You'll want to do it from outside. Here's an outline of how to proceed:

1. 移动集和 newData 起来，成为的 的实例变量的：

1. Move dataset and newData up to become instance variables:

DynamicTimeSeriesCollection dataset;
float[] newData = new float[1];

添加了附加数据以图表的集方法：

public synchronized void addData(byte[] chunk) {
    for (int i = 0; i < chunk.length; i++) {
        newData[0] = chunk[i];
        dataset.advanceTime();
        dataset.appendData(newData);
    }
}

从调用方法的serialEvent（）：

demo.addChunk(chunk);

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