I tried to create a new Gadgeteer project for MF4.3 and Raptor board with an SD Card module. An exception is thrown on this statement in the Designer generated code, program_generated.cs:
private void InitializeModules() {
this.sdCard = new GTM.GHIElectronics.SDCard(9);
}
In my Program.cs, an exception is thrown when I call sdCard.Mount(). A FAT32 formatted card is already inserted. This same card worked using MF4.2 on Raptor. It has files on it that are readable on a PC SD card reader.
using System;
using System.Collections;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Presentation;
using Microsoft.SPOT.Presentation.Controls;
using Microsoft.SPOT.Presentation.Media;
using Microsoft.SPOT.Presentation.Shapes;
using Microsoft.SPOT.Touch;
using Gadgeteer.Networking;
using GT = Gadgeteer;
using GTM = Gadgeteer.Modules;
using Gadgeteer.Modules.GHIElectronics;
namespace SDCardTest
{
public partial class Program
{
// This method is run when the mainboard is powered up or reset.
void ProgramStarted()
{
/*******************************************************************************************
Modules added in the Program.gadgeteer designer view are used by typing
their name followed by a period, e.g. button. or camera.
Many modules generate useful events. Type +=<tab><tab> to add a handler to an event, e.g.:
button.ButtonPressed +=<tab><tab>
If you want to do something periodically, use a GT.Timer and handle its Tick event, e.g.:
GT.Timer timer = new GT.Timer(1000); // every second (1000ms)
timer.Tick +=<tab><tab>
timer.Start();
*******************************************************************************************/
// Use Debug.Print to show messages in Visual Studio's "Output" window during debugging.
sdCard.Mounted += sdCard_Mounted;
sdCard.Unmounted += sdCard_Unmounted;
Debug.Print("SD Card is inserted = " + sdCard.IsCardInserted.ToString());
Debug.Print("SD Card is mounted = " + sdCard.IsCardMounted.ToString());
if (!sdCard.IsCardMounted)
new Thread(MySDCardMounter).Start();
Debug.Print("Program Started");
}
void MySDCardMounter()
{
sdCard.Mount();
}
void sdCard_Unmounted(SDCard sender, EventArgs e)
{
Debug.Print("SD Card was un-mounted");
}
void sdCard_Mounted(SDCard sender, GT.StorageDevice device)
{
Debug.Print("SD Card was mounted");
}
}
}
A first chance exception of type âSystem.Exceptionâ occurred in GHI.Hardware.dll
The thread ââ (0x4) has exited with code 0 (0x0).
Program Started
The thread ââ (0x3) has exited with code 0 (0x0).
Using mainboard GHI Electronics FEZ Raptor version 1.0
#### Exception System.Exception - 0xffffffff (1) ####
#### Message:
#### GHI.IO.Storage.SDCard::NativeConstructor [IP: 0000] ####
#### GHI.IO.Storage.SDCard::.ctor [IP: 0017] ####
#### SDCardTest.Program::InitializeModules [IP: 0005] ####
A first chance exception of type âSystem.Exceptionâ occurred in GHI.Hardware.dll
An unhandled exception of type âSystem.Exceptionâ occurred in GHI.Hardware.dll
public partial class Program
{
// This method is run when the mainboard is powered up or reset.
void ProgramStarted()
{
/*******************************************************************************************
Modules added in the Program.gadgeteer designer view are used by typing
their name followed by a period, e.g. button. or camera.
Many modules generate useful events. Type +=<tab><tab> to add a handler to an event, e.g.:
button.ButtonPressed +=<tab><tab>
If you want to do something periodically, use a GT.Timer and handle its Tick event, e.g.:
GT.Timer timer = new GT.Timer(1000); // every second (1000ms)
timer.Tick +=<tab><tab>
timer.Start();
*******************************************************************************************/
new Thread(sdCardTest).Start();
// Use Debug.Print to show messages in Visual Studio's "Output" window during debugging.
Debug.Print("Program Started");
}
void sdCardTest()
{
// if necessary, check that SD is present here...
SDCard sd_card = new SDCard();
sd_card.Mount();
bool fs_ready = false;
RemovableMedia.Insert += (a, b) =>
{
fs_ready = true;
};
while (! fs_ready ) {
System.Threading.Thread.Sleep(1);
}
// Assume only one storage device is available
// and that the media is formatted
string rootDirectory = VolumeInfo.GetVolumes()[0].RootDirectory;
FileStream FileHandle = new FileStream(rootDirectory +
@ "\hello.txt", FileMode.Create);
byte[] data =
Encoding.UTF8.GetBytes("This string will go in the file!");
FileHandle.Write(data, 0, data.Length);
FileHandle.Close();
sd_card.Unmount();
}
}
I think itâs telling you what your problem is (like all exceptions tend to )
Invalid Driver.
IMHO that means youâre doing it all wrong and the driver youâre invoking is not the one that is meant to leverage the SD card. I suspect that this is an artefact of the way youâve done things earlier to work around whatever other issue you were having. You probably need the SD Card object to be created outside the thread so it doesnât get GCâed
)