experchange > pocketpc.* > pocketpc.developer

Nisse Hulth (01-10-06, 11:25 AM)
Hi,

Does anyone know if there are a way to read a SD cards serial number in C#?

Nisse
buzz (01-10-06, 11:01 PM)
Here is how I do it in C/C++. Perhaps you could convert to C# (P/Invoke)

HEADER FILE
#ifndef _FLASHCARD_H
#define _FLASHCARD_H

class CFlashCard
{
public:
enum { MAX_CARD_PATH = 128 };

static BOOL isCardAvailable();
static BOOL getSerialNumber(TCHAR* buf, UINT bufLength);

static TCHAR* getCardPath() { return m_CardPath; }

protected:
static TCHAR m_CardPath[MAX_CARD_PATH];
};

#endif

CPP FILE
#include "stdafx.h"
#include "FlashCard.h"
#include <projects.h>
#include <winioctl.h>

// Include library Note_Prj.lib
#pragma comment (lib, "Note_Prj.lib")

//------------------------------------------------------------------------------
//
// Static data members
//
//------------------------------------------------------------------------------
TCHAR CFlashCard::m_CardPath[CFlashCard::MAX_CARD_PATH];

// The list of known on-board storage names
static const TCHAR* STORAGE[] =
{
_T("iPAQ File Store"),
_T("Built-in Storage")
};
static const ULONG STORAGE_COUNT = sizeof(STORAGE) / sizeof(TCHAR*);

//------------------------------------------------------------------------------
//
// Used to see if a flash card is inserted into a socket. Return true
if card
// is found, false otherwise. Also, if found, sets card's path
//
//------------------------------------------------------------------------------
BOOL CFlashCard::isCardAvailable()
{
BOOL res = TRUE;
HANDLE hFlashCard = NULL;
WIN32_FIND_DATA find;
BOOL loop = TRUE;
BOOL found = FALSE;
UINT flashCardCount = 0;

// Look for the SD card.
memset(&find, 0, sizeof(WIN32_FIND_DATA));

hFlashCard = ::FindFirstFlashCard(&find);

if(INVALID_HANDLE_VALUE != hFlashCard)
{
// We must enumerate the flash cards, since the dumb
// iPAQ file store is defined as a flash card
while(loop)
{
// Only look at the flash card if it is a directory and temporary
if(((find.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
FILE_ATTRIBUTE_DIRECTORY) &&
((find.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY) ==
FILE_ATTRIBUTE_TEMPORARY))
{
found = FALSE;

for(ULONG i=0; i<STORAGE_COUNT; i++)
{
if(_tcscmp(find.cFileName, STORAGE[i]) == 0)
{
found = TRUE;
}
}

// Only count the card if it is the correct size
if(found == FALSE)
{
// Save the name of the flash card
_tcsncpy(m_CardPath, find.cFileName, MAX_CARD_PATH);
flashCardCount++;
}
}

// Next flash card
loop = ::FindNextFlashCard(hFlashCard, &find);
}

::FindClose (hFlashCard);

// If no flash cards were found in the enumeration, then leave
if(flashCardCount == 0)
{
res = FALSE;
}
}
else
{
// No flash cards found
_stprintf(m_CardPath, _T("ERR: %d"), ::GetLastError());
res = FALSE;
}

return res;
}

//------------------------------------------------------------------------------
//
// Get the flash card serial number and save in passed in buffer.
//
//------------------------------------------------------------------------------
BOOL CFlashCard::getSerialNumber(TCHAR* buf, UINT bufLength)
{
// These values are only defined in Platform Builder, so we have to
// redefine them here
#define IOCTL_DISK_BASE FILE_DEVICE_DISK
#define IOCTL_DISK_GET_STORAGEID CTL_CODE(IOCTL_DISK_BASE, 0x709, \
METHOD_BUFFERED, FILE_ANY_ACCESS)
#define MANUFACTUREID_INVALID 0x01
#define SERIALNUM_INVALID 0x02

// This structure is only defined in Platform Builder, so we have to
// redefine it here
typedef struct _STORAGE_IDENTIFICATION
{
DWORD dwSize;
DWORD dwFlags;
DWORD dwManufactureIDOffest;
DWORD dwSerialNumOffset;
} STORAGE_IDENTIFICATION, *PSTORAGE_IDENTIFICATION;

const UINT BBUF_LENGTH = 256;
const UINT STR_LENGTH = 256;
const UINT SERIAL_NUMBER_LENGTH = 8;
BOOL res = TRUE;
byte bbuf[BBUF_LENGTH];
TCHAR str[STR_LENGTH];
STORAGE_IDENTIFICATION* si;
HANDLE hCard = NULL;
ULONG dwNumReturned = 0;
ULONG err = 0;

// Make sure a card is inserted and found before attempting to read
// the serial number
if(isCardAvailable() == TRUE)
{
// Clear the buffer
memset(bbuf, 0, BBUF_LENGTH);

// Clear the buffer
memset(buf, 0, bufLength * sizeof(TCHAR));

// Set a STORAGE_IDENTIFICATION pointer to the buffer (overlaying the
structure)
si = (STORAGE_IDENTIFICATION*)bbuf;

// Create the volume name of the flash card
_stprintf(str, _T("\\%s\\Vol:"), m_CardPath);

// Get a handle to the flash card (drive) volume
hCard = ::CreateFile(str, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);

// Set the size element of the STORAGE_IDENTIFICATION structure
si->dwSize = BBUF_LENGTH;

// Fill the STORAGE_IDENTIFICATION structure with the flash card info
if(::DeviceIoControl(hCard, IOCTL_DISK_GET_STORAGEID, (LPVOID)NULL, 0,
si, BBUF_LENGTH, &dwNumReturned, NULL) == FALSE)
{
err = ::GetLastError();
res = FALSE;
}

// Close the handle
::CloseHandle (hCard);

// See if the serial number is valid. If not, return false, otherwise
get
// the serial number
if((si->dwFlags & SERIALNUM_INVALID) != SERIALNUM_INVALID)
{
// Get a char pointer to the serial number in the byte array
CHAR* sn = (CHAR*)((UINT)si + si->dwSerialNumOffset);

// Covert the CHAR serial number to a TCHAR string
mbstowcs(buf, sn, SERIAL_NUMBER_LENGTH);
buf[SERIAL_NUMBER_LENGTH] = 0;
}
else
{
// Serial number is not available
_tcscpy(buf, _T("! NONE !"));
res = FALSE;
}
}
else
{
// No card
_tcscpy(buf, _T("NO CARD"));
res = FALSE;
}

return res;
}

Nisse Hulth wrote:
Joe (02-09-06, 07:22 PM)
Dear all,

Unfortunately I don't know C/C++, could someone give me some hint how to do
the same in VB

Many thanks

"buzz" wrote:
[..]
news.carnet.hr (02-24-06, 01:56 AM)
// 1. DECLARE NEEDED FUNCTION

[DllImport("coredll.dll")]
private static extern bool KernelIoControl(Int32 IoControlCode, IntPtr
InputBuffer, Int32 InputBufferSize, byte[] OutputBuffer, Int32
OutputBufferSize, ref Int32 BytesReturned);

// 2. SOMEWHERE, (e.g. ON BUTTON CLICK) DO THIS

byte[] OutputBuffer = new byte[256];
uint OutputBufferSize = OutputBuffer.Length;
uint bre=0;
KernelIoControl(IOCTL_DISK_GET_STORAGEID,IntPtr.Ze ro,0,OutputBuffer,OutputBufferSize,ref
BytesReturned);

// 3. DO SOMETHING WITH OutputBuffer

funny part : I don't have evc++4.0, so if someone can send me/followup VALUE
of IOCTL_DISK_GET_STORAGEID (or heder file containing same), thanks
shilla
nlrbsucks (01-03-17, 03:14 AM)
On Tuesday, January 10, 2006 at 4:01:15 PM UTC-5, buzz wrote:
[..]
> return res;
> }
> Nisse Hulth wrote:


Buzz,
Can you provide missing header files and functions that do not appear in this text? I have been looking for a way to identify SD card vendors and model numbers.Any help you can provide will be greatly appreciated. I have beenlooking all over the WWW for a solution. Thanks,
Ken
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