FEZ Communicating with multiple I2C Devices Example

This code example demonstrates how to connect to multiple sensor(s) and/or device(s) connected to an I2C (IIC) port on a GHI Electronics FEZ board.

This code is written in C# and assumes the development workstation has all required software installed.

using System;

using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
 
public class Program
{
    public static void Main()
    {
        I2CDevice.Configuration conDeviceA = new I2CDevice.Configuration(0x38, 400);
        I2CDevice.Configuration conDeviceB = new I2CDevice.Configuration(0x48, 400);
 
        I2CDevice MyI2C = new I2CDevice(conDeviceA);
 
        I2CDevice.I2CTransaction[] xActions = new I2CDevice.I2CTransaction[2];
 
        byte[] RegisterNum = new byte[1] { 2 };
        xActions[0] = I2CDevice.CreateWriteTransaction(RegisterNum);
		
        byte[] RegisterValue = new byte[1];
        xActions[1] = I2CDevice.CreateReadTransaction(RegisterValue);
 
        MyI2C.Config = conDeviceA;
        if (MyI2C.Execute(xActions, 1000) == 0)
        {
            Debug.Print("Failed to perform I2C transaction");
        }
        else
        {
            Debug.Print("Register value: " + RegisterValue[0].ToString());
        }
 
        MyI2C.Config = conDeviceB;
        if (MyI2C.Execute(xActions, 1000) == 0)
        {
            Debug.Print("Failed to perform I2C transaction");
        }
        else
        {
            Debug.Print("Register value: " + RegisterValue[0].ToString());
        }
    }
}

For more information on specific namespaces please refer to the following resources:

• System Namespace
• Microsoft.SPOT Namespace
• Microsoft.SPOT.Hardware Namespace

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