查看“Servo Control”的源代码

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==Objective==

The course will show you how to control the turning of a steering engine by using Processing. 

==Equipment==
*'''[[Microduino-Core]]'''
*'''[[Microduino-FT232R]]'''

*Other Hardware Equipment
**A USB cable 
**A steering engine 

==Schematic==

[[File:processingServoControlSchematics.jpg|600px|center|thumb]]

==Program==

Referring to processingServoControl


==Debugging==

Step 1: Build the hardware environment according to the schematic, as follows: 

[[File:processingServoControlConnectionDiagram.jpg|600px|center|thumb]]


Step 2：Here the code needed: 

The code of the two ends (Processing and Microduino) 

Microduino:

Using firmata StandardFirmata’s program since it achieves the method of how to control a steering engine 


Processing:

//Define serial communication in “Setup” and set “pinMode”  arduino = new Arduino(this, Arduino.list()[0], 57600); //your offset may vary
  arduino.pinMode(9, 5);

//Read the value of the mouse on the x-coordinate to set the angle of the steering engine 
  void draw()
  {
    // read mouseX coordinate
    int newPos = constrain(mouseX/2, 0, 180); // update bg & servo position if mouseX changed
    if (newPos != pos)
    {
      background(0);
      stroke(255);  
      line(mouseX, 0, mouseX, 160);   
      text (newPos, mouseX, 180); 
      arduino.analogWrite(9, newPos);
      println (" newPos = " + newPos );
      pos=newPos; //update servo position storage variable
    }
  } 


Step 3：Download the code and pass the compiling. 

Step 4：Move the mouse around to see how the steering changes after the system goes well. 

==Result==

In Processing, an indicator will be displayed. Along with the change of the mouse on the x-coordinate, the steering engine will also rotate: 
[[File:processingServoControlResult.jpg|600px|center|thumb]]


==Video==


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