“指南针”的版本间的差异

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{{Language | Compass}}
 
{| style="width: 800px;"
 
{| style="width: 800px;"
 
|-
 
|-
 
|
 
|
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==Objective==
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==目的==
  
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The course will show you how to simulate a compass on Processing by presenting the data of magnetic field strength detected by Microduino-10DOF module.
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本教程将教大家如何用Microduino-10DOF模块测到的磁场强度数据在Processing中显示一个指南针。
  
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==Equipments==
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==设备==
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*'''[[Microduino-Core]]'''
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*'''[[Microduino-Core/zh]]'''
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*'''[[Microduino-FT232R]]'''
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*'''[[Microduino-USBTTL/zh]]'''
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*'''[[Microduino-10DOF]]'''
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*'''[[Microduino-10DOF/zh]]'''
  
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*Other Hardware Equipments
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*其他硬件设备
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**A USB cable
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**USB数据连接线  一根
  
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==Schematic Diagram==
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==原理图==
  
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The HMC5883L magnetic field strength sensor of Microduino-10DOF will be available.
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直接使用Microduino-10DOF上的HMC5883L磁场强度传感器
  
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==Program==
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==程序==
  
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Referring to  compassMicroduino
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[https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Processing/compassMicroduino compassMicroduino]
  
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compass_simulator
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[https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Processing/compass_simulator compass_simulator]
  
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==Debugging==
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==调试==
  
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Step 1：Building the hardware environment according to the schematic diagram, just like this:
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步骤一：按着原理图搭建硬件环境，像这样：
 
[[File:compass_simulatorConnectionDiagram.jpg|600px|center|thumb]]
 
[[File:compass_simulatorConnectionDiagram.jpg|600px|center|thumb]]
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下载这个HMC5883L的库函数：[https://github.com/manifestinteractive/arduino/tree/master/Libraries/HMC5883L HMC5883L]
  
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步骤二：解释一下代码：
  
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Step 2：Here is the code we need:
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本例需要两端的代码，Processing端和Microduino端
  
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The code of the two ends (Processing and Microduino) 
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Microduino:
  
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Microduino:
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在setup()中主要是初始化HMC5883L
  
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//The data of the magnetic field strength will be exported into the serial port to be displayed on Processing 
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在loop()中计算出周围磁感应的角度
  
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   void loop()
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//Output()用来输出计算出的角度到串口
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  // Output the data down the serial port.
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   void Output(int RoundDegreeInt)
 
   {
 
   {
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     mag.getHeading(&mx, &my, &mz);
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     //Serial.println();
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    Serial.print(mx);
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     Serial.println(RoundDegreeInt);
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     Serial.print(",");
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     delay(150);
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     Serial.println(my);  
 
 
   }
 
   }
  
 
Processing:
 
Processing:
  
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//After getting the data of the first serial port, defining them or caching them if there is a new line  // is always my  Arduino, so I open Serial.list()[0].
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//得到第一个串口的数据.
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  // Open whatever port is the one you're using.
 
 
   myPort = new Serial(this, Serial.list()[0], 9600);
 
   myPort = new Serial(this, Serial.list()[0], 9600);
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  myPort.bufferUntil('\n'); // Trigger a SerialEvent on new line
 
  
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//Presenting the data obtained from Microduino on the screen in the form of curves with different color and then marking them
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//在draw()函数中，第一步得到串口传来的数据
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  while (myPort.available() > 0) {
 +
    myString = myPort.readStringUntil(lf);
 +
    if (myString != null) {
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  //print(myString);  // Prints String
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    angle=float(myString);  // Converts and prints float
 +
    println(angle);
 +
    }
 +
  }
 +
  translate(160, 50);
 +
 
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//绘制指南针的背景
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  // draw the compass background
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  ellipseMode(CENTER);
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  fill(50);
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  stroke(10);
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  strokeWeight(2);
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  ellipse(150,150,300,300);
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 +
 
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//绘制线和点
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  // draw the lines and dots
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  translate(150,150);  // translate the lines and dots to the middle of the compass
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  float CompassX = -angle;
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  rotate(radians(CompassX));
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  noStroke();
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  fill(51, 255, 51);
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  int radius = 120;
 +
  for( int degC = 5; degC < 360; degC += 10) //Compass dots
 +
  {
 +
    float angleC = radians(degC);
 +
    float xC = 0 + (cos(angleC)* radius);
 +
    float yC = 0 + (sin(angleC)* radius);
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    ellipse(xC,yC, 3, 3);
 +
  }
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  for( int degL = 10; degL < 370; degL += 10) //Compass lines
 +
  {
 +
    float angleL = radians(degL);
 +
    float x = 0 + (cos(angleL)* 145);
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    float y = 0 + (sin(angleL)* 145);
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    if( degL==90 || degL==180 || degL==270 || degL==360) {
 +
    stroke(51, 255, 51);
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    strokeWeight(4);
 +
    }
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    else {
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      stroke(234,144,7);
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      strokeWeight(2);
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    }
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    line(0,0, x,y);
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  }
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  fill(102, 102, 102);
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  noStroke();
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  ellipseMode(CENTER);
 +
  ellipse(0,0, 228,228); //draw a filled circle to hide the lines in the middle
 +
 
  
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Function Description:
 
  
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//Drawing a magnetic field pointer
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//绘制指南针的方向表示，东西南北
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arrow(int x1, int y1, int x2, int y2, color c)
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  b = loadFont("Arial-BoldMT-48.vlw");
 +
  textAlign(CENTER);
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  // Draw the letters
 +
  fill(250);
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  textFont(b, 32);
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  text("N", 1, -90);
 +
  rotate(radians(90));
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  text("E", 0, -90);
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  rotate(radians(90));
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  text("S", 0, -90);
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  rotate(radians(90));
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  text("W", 0, -90);
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  rotate(radians(90));
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  textFont(b,40);
 +
  textAlign(CENTER);
 +
  //text((angle), 20, 20);
 +
  println(angle);
  
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//Judging whether can convert them into numbers
 
−
isNumeric(String str)
 
  
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Step 3：Uploading the code and compiling them successfully.
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//绘制指南针
 +
  //draw the needle
 +
  rotate(radians(-CompassX)); //make it stationary
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  stroke(234,144,7);
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  strokeWeight(3);
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  triangle(-10, 0, 10, 0, 0, -85);
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  fill(234,144,7);
 +
  triangle(-10, 0, 10, 0, 0, 60);
  
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Step 4：After the system goes smoothly, you can use a magnet to change the magnetic field and see if there is any change.
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步骤三：下载代码并编译通过。
  
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==Result==
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步骤四：运行后，用一块磁铁改变一下磁场，看看指针是否变化。
  
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There will be a simple compass displayed on the screen and the pointer will change along with the magnetic field. As follows:
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==结果==
−
[[File:compass_simulatorResult.jpg|600px|center|thumb]]
 
  
 +
屏幕上会显示一个简单的指南针，指针会随着磁场走，像这样：
 +
[[File:compass_simulatorResult1.jpg|600px|center|thumb]]
  
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==Video==
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==视频==
  
  
 
|}
 
|}

2014年10月29日 (三) 07:20的最新版本

Language English

目的

本教程将教大家如何用Microduino-10DOF模块测到的磁场强度数据在Processing中显示一个指南针。

设备

  • 其他硬件设备
    • USB数据连接线 一根

原理图

直接使用Microduino-10DOF上的HMC5883L磁场强度传感器

程序

compassMicroduino

compass_simulator

调试

步骤一：按着原理图搭建硬件环境，像这样：

Compass simulatorConnectionDiagram.jpg

下载这个HMC5883L的库函数：HMC5883L

步骤二：解释一下代码：

本例需要两端的代码，Processing端和Microduino端

Microduino:

在setup()中主要是初始化HMC5883L

在loop()中计算出周围磁感应的角度

//Output()用来输出计算出的角度到串口 

 // Output the data down the serial port.
 void Output(int RoundDegreeInt)
 {
   //Serial.println();
   Serial.println(RoundDegreeInt);
   delay(150);
 }

Processing:

//得到第一个串口的数据. 

 myPort = new Serial(this, Serial.list()[0], 9600);

//在draw()函数中，第一步得到串口传来的数据 

 while (myPort.available() > 0) {
   myString = myPort.readStringUntil(lf);
   if (myString != null) {
 //print(myString);  // Prints String
   angle=float(myString);  // Converts and prints float
   println(angle);
   }
 }
 translate(160, 50);

//绘制指南针的背景 

 // draw the compass background
 ellipseMode(CENTER);
 fill(50);
 stroke(10);
 strokeWeight(2);
 ellipse(150,150,300,300);


//绘制线和点 

 // draw the lines and dots
 translate(150,150);  // translate the lines and dots to the middle of the compass
 float CompassX = -angle;
 rotate(radians(CompassX));
 noStroke();
 fill(51, 255, 51);
 int radius = 120;
 for( int degC = 5; degC < 360; degC += 10) //Compass dots
 {
   float angleC = radians(degC);
   float xC = 0 + (cos(angleC)* radius);
   float yC = 0 + (sin(angleC)* radius);
   ellipse(xC,yC, 3, 3);
 }
 for( int degL = 10; degL < 370; degL += 10) //Compass lines
 {
   float angleL = radians(degL);
   float x = 0 + (cos(angleL)* 145);
   float y = 0 + (sin(angleL)* 145);
   if( degL==90 || degL==180 || degL==270 || degL==360) {
    stroke(51, 255, 51);
    strokeWeight(4);
   }
   else {
     stroke(234,144,7);
     strokeWeight(2);
   }
   line(0,0, x,y);
 }
 fill(102, 102, 102);
 noStroke();
 ellipseMode(CENTER);
 ellipse(0,0, 228,228); //draw a filled circle to hide the lines in the middle


//绘制指南针的方向表示，东西南北 

 b = loadFont("Arial-BoldMT-48.vlw");
 textAlign(CENTER);
 // Draw the letters
 fill(250);
 textFont(b, 32);
 text("N", 1, -90);
 rotate(radians(90));
 text("E", 0, -90);
 rotate(radians(90));
 text("S", 0, -90);
 rotate(radians(90));
 text("W", 0, -90);
 rotate(radians(90));
 textFont(b,40);
 textAlign(CENTER);
 //text((angle), 20, 20);
 println(angle);


//绘制指南针 

 //draw the needle
 rotate(radians(-CompassX)); //make it stationary
 stroke(234,144,7);
 strokeWeight(3);
 triangle(-10, 0, 10, 0, 0, -85);
 fill(234,144,7);
 triangle(-10, 0, 10, 0, 0, 60);

步骤三：下载代码并编译通过。

步骤四：运行后，用一块磁铁改变一下磁场，看看指针是否变化。

结果

屏幕上会显示一个简单的指南针，指针会随着磁场走，像这样：

Compass simulatorResult1.jpg

视频

取自“http:///https//wiki.microduino.cn/index.php?title=指南针&oldid=5395”