Hi, I’m really newb with NETMF and start facing strange problems >:( !
I wrote (with the help of the beginner guide) this code:
using System;
using System.IO;
using System.Threading;
using System.Text;
using Microsoft.SPOT;
using Microsoft.SPOT.IO;
using Microsoft.SPOT.Hardware;
using GHIElectronics.NETMF.FEZ;
using GHIElectronics.NETMF.IO;
using GHIElectronics.NETMF.Hardware;
namespace AutoMount
{
public class Program
{
static Boolean sdOK;
static InterruptPort IntButton;
static int nb;
static OutputPort LED;
public static void Main()
{
RemovableMedia.Insert += new InsertEventHandler(RemovableMedia_Insert);
RemovableMedia.Eject += new EjectEventHandler(RemovableMedia_Eject);
Debug.Print("START!!!");
sdOK = new Boolean();
sdOK = false;
nb = 0;
// Start auto mounting thread
LED = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.LED, false);
new Thread(SDMountThread).Start();
// Your program goes here
// ...
// la broche génèrera une interruption à chaque flanc haut et bas
IntButton = new InterruptPort((Cpu.Pin)FEZ_Pin.Interrupt.LDR, true,Port.ResistorMode.PullUp, Port.InterruptMode.InterruptEdgeLow);
// ajoute un gestionnaire d'interruption à la broche
IntButton.OnInterrupt += new NativeEventHandler(IntButton_OnInterrupt);
Thread.Sleep(Timeout.Infinite);
}
static void IntButton_OnInterrupt(uint port, uint state, DateTime time)
{
Debug.Print("LDR press!");
LED.Write(true);
if (sdOK)
{
// Considère qu'un périphérique de stockage est disponible et y accède à travers NETMF
string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;
FileStream FileHandle = new FileStream(rootDirectory + @ "\hello.txt", FileMode.Append);
byte[] data = Encoding.UTF8.GetBytes(nb+" Cette chaine ira dans le fichier !\r\n");
// Ecrit les données et ferme le fichier
FileHandle.Write(data, 0, data.Length);
FileHandle.Close();
//VolumeInfo.GetVolumes()[0].FlushAll();
Debug.Print("SD writting! "+nb+" Cette chaine ira dans le fichier !");
nb++;
}
else
{
Debug.Print("Pas de SD ou mauvais systeme de fichier (formater en FAT16/32)");
}
}
static void RemovableMedia_Eject(object sender, MediaEventArgs e)
{
Debug.Print("SD card ejected");
sdOK = false;
}
static void RemovableMedia_Insert(object sender, MediaEventArgs e)
{
Debug.Print("SD card inserted");
if (e.Volume.IsFormatted)
{
Debug.Print("SD card is OK and ready");
sdOK = true;
}
else
{
Debug.Print("SD card is not formatted");
sdOK = false;
}
}
public static void SDMountThread()
{
PersistentStorage sdPS = null;
const int POLL_TIME = 3000; // check every 3 second
bool sdExists;
while (true)
{
try // If SD card was removed while mounting, it may throw exceptions
{
sdExists = PersistentStorage.DetectSDCard();
// make sure it is fully inserted and stable
if (sdExists)
{
Thread.Sleep(50);
sdExists = PersistentStorage.DetectSDCard();
}
if (sdExists && (sdPS == null))
{
sdPS = new PersistentStorage("SD");
sdPS.MountFileSystem();
Thread.Sleep(250);
sdOK = true;
}
else if (!sdExists && (sdPS != null))
{
sdOK = false;
sdPS.UnmountFileSystem();
Thread.Sleep(250);
sdPS.Dispose();
Thread.Sleep(250);
sdPS = null;
}
}
catch
{
if (sdPS != null)
{
sdPS.Dispose();
Thread.Sleep(250);
sdPS = null;
}
}
Thread.Sleep(POLL_TIME);
}
}
}
}
Quickly, this code must turn the onboard LED on when I press the LDR key and write a new line (starting by a nomber i incremeent eatch time) in a file on the SDcart
But every time I reinsert the SD card, the Panda crash! ( the led shutdown, and If I press LDR the counter add in the beginning of my line restart from 0 in my file, and I lost the Debug.Print ability in VisualStudio)
An other fact, when I remove or insert a sd card, the onboard led seem to fadeaway like if theire is a short on the Panda board (is it possible?) but few sec later the led go back to full light…
So my question (finaly 
) WHAT I’M DOING WRONG!!! this turning me to mad! I only need to automount/unmount card (btw I already try with sdDetect pin it’s the same) and raise a flag (sdOK here) to know that a SDcard is in and I can write on it…
FInal point, I work on Panda 2 with 4.1.5.0 solution revision.
