FEZ Mounting a USB Drive Example

This code example demonstrates how to mount a mass storage USB device from a GHI Electronics FEZ board. Take note that some of the code contained herein is similar to code used on a PC while working with the local file system. Therefore, some of this code may be familiar if you have worked with the System.IO namespace in .NET.

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

using System;
using System.IO;
using System.Threading;

using Microsoft.SPOT;
using Microsoft.SPOT.IO;

using GHIElectronics.NETMF.IO;
using GHIElectronics.NETMF.USBHost;
 
namespace Test
{
    class Program
    {
        static PersistentStorage ps;
 
        public static void Main()
        {
            RemovableMedia.Insert += RemovableMedia_Insert;
            RemovableMedia.Eject += RemovableMedia_Eject;
 
            USBHostController.DeviceConnectedEvent += DeviceConnectedEvent;
 
            Thread.Sleep(Timeout.Infinite);
        }
 
        static void DeviceConnectedEvent(USBH_Device device)
        {
            if (device.TYPE == USBH_DeviceType.MassStorage)
            {
                Debug.Print("USB Mass Storage detected...");
                ps = new PersistentStorage(device);
                ps.MountFileSystem();
            }
        }
 
        static void RemovableMedia_Insert(object sender, MediaEventArgs e)
        {
            Debug.Print("Storage "" + e.Volume.RootDirectory +  "" is inserted.");
            Debug.Print("Getting files and folders:");

            if (e.Volume.IsFormatted)
            {
                string[] files = Directory.GetFiles(e.Volume.RootDirectory);
                string[] folders = Directory.GetDirectories(e.Volume.RootDirectory);
 
                Debug.Print("Files available on " +  e.Volume.RootDirectory + ":");
                for (int i = 0; i < files.Length; i++)
                    Debug.Print(files[i]);
 
                Debug.Print("Folders available on " +  e.Volume.RootDirectory + ":");
                for (int i = 0; i < folders.Length; i++)
                    Debug.Print(folders[i]);
            }
            else
            {
                Debug.Print("Storage is not formatted. Format on PC with  FAT32/FAT16 first.");
            }
        }
 
        static void RemovableMedia_Eject(object sender, MediaEventArgs e)
        {
            Debug.Print("Storage "" + e.Volume.RootDirectory +  "" is ejected.");
        }
    }
}

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

Need more help or Can’t find the code you need?