Color sensor using I2C device - Detect color through I2C device


1. Download and open C# project file
  1. Download source code.

    Color.Sample1.zip



2. C# source code for Color.Sample1
  1. Program.cs

      
    
    using System;
    
    using Microsoft.SPOT;
    using Microsoft.SPOT.Input;
    using Microsoft.SPOT.Presentation;
    using Microsoft.SPOT.Presentation.Controls;
    using Microsoft.SPOT.Hardware;
    
    using SPL.Script.Engine;
    
    namespace SPLMFConsoleWindow1
    {
        public class Program : Microsoft.SPOT.Application
        {
            public static void Main()
            {
                Program myApplication = new Program();
    
                Window mainWindow = myApplication.CreateWindow();
    
                GPIOButtonInputProvider inputProvider = new GPIOButtonInputProvider(null);
    
                myApplication.Run(mainWindow);
            }
    
            private Window mainWindow;
    
            //##########################  Sample Code  #################################
            private ConsoleWindow _consoleWindow;
    
            private I2CDevice _device = null;
            private I2CDevice _i2c2 = null;
            //##########################################################################
    
            public Window CreateWindow()
            {
                mainWindow = new Window();
                mainWindow.Height = SystemMetrics.ScreenHeight;
                mainWindow.Width = SystemMetrics.ScreenWidth;
    
                //##########################  Sample Code  #################################
                Font font = Resources.GetFont(Resources.FontResources.small);
                _consoleWindow = new ConsoleWindow(font);
    
                mainWindow.Child = _consoleWindow;
                //##########################################################################
    
                mainWindow.AddHandler(Buttons.ButtonUpEvent, new ButtonEventHandler(OnButtonUp), false);
    
                mainWindow.Visibility = Visibility.Visible;
    
                Buttons.Focus(mainWindow);
    
                //##########################  Sample Code  #################################
                _consoleWindow.WriteLine("Push Select-Button to make a robot turn.");
                //##########################################################################
    
    
                //##########################  Sample Code  #################################
                I2CDevice.Configuration config = new I2CDevice.Configuration(
                                58,
                                100
                                );
    
                _device = new I2CDevice(config);
    
    
                I2CDevice.Configuration i2c2_config = new I2CDevice.Configuration(
                                60,
                                100
                                );
    
                _i2c2 = new I2CDevice(i2c2_config);
    
                System.Threading.Thread serialReaderThread = new System.Threading.Thread(i2c2_Reader);
                serialReaderThread.Start();
    
                //##########################################################################
    
                return mainWindow;
            }
    
            private void OnButtonUp(object sender, ButtonEventArgs e)
            {
                //##########################  Sample Code  #################################
                if (e.Button == Microsoft.SPOT.Hardware.Button.VK_SELECT)
                {
                    byte[] wBuff = new byte[3];
                    wBuff[0] = 4;
                    wBuff[1] = 90;     //-0.1
                    wBuff[2] = 110;     //0.1
    
                    I2CDevice.I2CWriteTransaction wTr = _device.CreateWriteTransaction(wBuff);
                    I2CDevice.I2CTransaction[] wTrArr = new I2CDevice.I2CTransaction[] { wTr };
    
                    //Go Forwards
                    int count = _device.Execute(wTrArr, 1000);
    
                    _consoleWindow.WriteLine("Turn left");
                }
                //##########################################################################
            }
    
    
            //##########################  Sample Code  #################################
            private void i2c2_Reader()
            {
                byte[] rBuff = new byte[3];
    
                while (true)
                {
                    try
                    {
                        I2CDevice.I2CReadTransaction rTr = _device.CreateReadTransaction(rBuff);
                        I2CDevice.I2CTransaction[] rTrArr = new I2CDevice.I2CTransaction[] { rTr };
    
                        int count = _i2c2.Execute(rTrArr, 1000);
    
                        if (rBuff != null)
                        {
                            int r = rBuff[0];
                            int g = rBuff[1];
                            int b = rBuff[2];
    
                            LogInfo("Detected color : " + r.ToString() + " / " + g.ToString() + " / " + b.ToString());
                        }
                    }
                    catch { }
    
                    System.Threading.Thread.Sleep(300);
                }
            }
    
            private void LogInfo(string log)
            {
                this.Dispatcher.BeginInvoke(
                    new DispatcherOperationCallback(
                        delegate(object report)
                        {
                            _consoleWindow.WriteLine(log);
                            return null;
                        }
                        ), null
                    );
            }
            //##########################################################################
        }
    }
    
    
      



3. Execute C# project
  1. Open "Properties" page of C# project.

  2. Choose ".NET Micro Framework" tab.

  3. Select "SPLMFConsoleEmulator" from the emulator list.



  4. Press "F5" key to run sample code.




4. Launch simulation environment
  1. Start "SPL script editor for MSRDS" and add SPL simulation script.

  2. Add script on the editor as follows.



      
    MFEmulator    emul1
    	/Procedure_I2CWrite:proc_i2c_write
    
    StartSimulationEngine  "SimState/basicsim.xml"
    
    AddNewEntity    ent1  	/Position:1.5  0.3  0
    AddBoxShape  	/Dimensions:0.6  0.8  2.0  	/Mass:100
    	/DiffuseColor:1  0  0  1
    
    AddNewEntity    ent2  	/Position:0  0.4  -1.5
    AddBoxShape  	/Dimensions:2.0  0.8  0.6  	/Mass:100
    	/DiffuseColor:1  1  1  1
    
    AddNewEntity    ent3  	/Position:-1.5  0.4  0
    AddBoxShape  	/Dimensions:0.6  0.8  2.0  	/Mass:100
    	/DiffuseColor:0  0  0.627451  1
    
    AddDifferentialDriveEntity    base1
    
    AddColorSensorEntity    color1
    	/Position:0  0.4  -0.3
    	/ParentEntity:base1
    	/Procedure_SensorNotify:proc_color
    
    FlushScript  
    
    procedure  proc_color
    
    	r = value.NormalizedAverageRed	//0.0 ~ 1.0
    	g = value.NormalizedAverageGreen	//0.0 ~ 1.0
    	b = value.NormalizedAverageBlue	//0.0 ~ 1.0
    	
    	r = r * 255	//convert to 0 ~ 255
    	g = g * 255	//convert to 0 ~ 255
    	b = b * 255	//convert to 0 ~ 255
    	
    	//convert type as byte
    	sendBytes = Util.CreateArrayByte(3)
    	sendBytes[0] = Util.ToByte(r)	
    	sendBytes[1] = Util.ToByte(g)	
    	sendBytes[2] = Util.ToByte(b)	
    		
    	emul1.SetI2CReadBuffer("i2c2", sendBytes)
    		
    end 
    
    procedure  proc_i2c_write
    	
    	if (value.Id == "i2c1")
    	{
    		command_type = value.ReceivedBytes[0]
    		
    		if (command_type == 1)
    		{		
    			distance = value.ReceivedBytes[1]
    			power = value.ReceivedBytes[2]
    	
    			power = power - 100
    
    			distance = Util.ToDouble(distance / 10.0)
    			power = Util.ToDouble(power / 100.0)
    
    			print "Distance -> " + distance.ToString() + " m / Power -> " + power.ToString()
    			
    			base1.GoTo(distance, power)
    		}
    		else if (command_type == 2)
    		{		
    			degrees = value.ReceivedBytes[1]
    			power = value.ReceivedBytes[2]
    	
    			degrees = degrees -100
    			power = power - 100
    
    			degrees = Util.ToDouble(degrees)
    			power = Util.ToDouble(power / 100.0)
    
    			print "Degrees -> " + degrees.ToString() + " / Power -> " + power.ToString()
    			
    			base1.Turn(degrees, power)
    		}
    		else if (command_type == 4)
    		{		
    			left_power = value.ReceivedBytes[1]
    			right_power = value.ReceivedBytes[2]
    	
    			left_power = left_power - 100
    			right_power = right_power - 100
    
    			left_power = Util.ToDouble(left_power / 100.0)
    			right_power = Util.ToDouble(right_power / 100.0)
    
    			print "Left -> " + left_power.ToString() + " / Right -> " + right_power.ToString()
    			
    			base1.Go(left_power, right_power)
    		}
    	}
    
    end 
    
      


  3. Save script.

  4. Press "F5" key or click "Run" icon.



5. Start demo
  1. Click Select-Button to start demo.



  2. You can see that the color values are printed on the log as robot turns.