Re: Data transfer between serial port and USB port in single PC - C / C++ / MFC Discussion Boards

Re: FILETIME, is the unit correct?

Rajesh R Subramanian12-Aug-09 21:25

Rajesh R Subramanian

12-Aug-09 21:25

My head asplode, sir. Smile | :)

It is a crappy thing, but it's life -^ Carlo Pallini

Re: FILETIME, is the unit correct?

Stuart Dootson12-Aug-09 21:27

Stuart Dootson

12-Aug-09 21:27

Too much Vista - take a Weven pill and all will be well with you! Laugh | :laugh:

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: FILETIME, is the unit correct?

Rajesh R Subramanian12-Aug-09 22:03

Rajesh R Subramanian

12-Aug-09 22:03

Actually yes. Scraped Vista off my home PC (running the 7 pill now) I'm a happy man. I work with XP at office, and there's no trace of Vista, any more in my life. Happy man, me. Smile | :)

Did I mention that I'm a happy man?

It is a crappy thing, but it's life -^ Carlo Pallini

Re: FILETIME, is the unit correct?

Stuart Dootson12-Aug-09 22:09

Stuart Dootson

12-Aug-09 22:09

Whereas soon I'm going to start using Vista for the first time Frown | :-(

I have two PCs on my desk @ work. One's my 'corporate network' PC...that I use for e-mail and....well, e-mail really. That currently runs Windows 2000 (yep, you read that right) like the thousands of other employees here. We got an e-mail yesterday basically saying that over the next 3-6 months, Vista and Office 2007 would be rolled out to our PC estate. I have to say I'm really looking forward to using Vista on a poxy old Pentium 4 PC with 1GB of RAM. My co-worker, with a 2.2GHz Celeron and 512MB of RAM is looking forward to it even more Smile | :)

My second PC @ work currently runs XP. If I could be bothered, I'd upgrade to Weven. But it works, so I probably won't...for a while. Got a Weven VM, though.

At home, it's OS X all the way, apart from my Weven VM that I use to run Visual Studio (and Office on the rare occasion that iWork isn't enough for working with Office docs).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: FILETIME, is the unit correct?

Rajesh R Subramanian12-Aug-09 23:25

Rajesh R Subramanian

12-Aug-09 23:25

Stuart Dootson wrote:
My co-worker, with a 2.2GHz Celeron and 512MB of RAM is looking forward to it even more

Good luck with your new endeavour. It's going to be one hell of a ride. Poke tongue | ;-P

It is a crappy thing, but it's life -^ Carlo Pallini

Re: FILETIME, is the unit correct?

Stuart Dootson13-Aug-09 0:06

Stuart Dootson

13-Aug-09 0:06

I'm thinking of a little wager on how far through the boot process it gets before the machine gives up under the strain of the unfair challenge

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Data transfer between serial port and USB port in single PC

praben12-Aug-09 5:36

praben

12-Aug-09 5:36

I am implementing MODBUS protocol. I want to try my C/C++ program between serial port and USB port on single PC before executing code in microcontrollers. Please give me some hint!!!

Re: Data transfer between serial port and USB port in single PC

CPallini12-Aug-09 6:30

CPallini

12-Aug-09 6:30

There are many many MODBUS resources on the web, see, for instance, here.
CodeProject has some MODBUS related articles too [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
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[My articles]

Re: Data transfer between serial port and USB port in single PC

Rick York12-Aug-09 7:03

Rick York

12-Aug-09 7:03

here's one : use a serial to USB converter.

C++ library for Three Dimensional data visualisation

su_marvel12-Aug-09 5:23

su_marvel

12-Aug-09 5:23

Hi,

I am looking for a C++ library for 3D data visualisation. The main features that I'm looking for are
1. Capability to handle large data sets(MB's to few GBs)
2. Interactive 3D visualisation
3. Slicing through the data cube
4. Real time visualisation from buffer without having to save data to hard disk

Could anyone please suggest me some good libraries(both Open source or non open source)?

Thanks in advance.

Re: C++ library for Three Dimensional data visualisation

Stuart Dootson12-Aug-09 6:35

Stuart Dootson

12-Aug-09 6:35

I believe VTK[^] (or one of the open-source libraries related to it[^]) might be a good match for your requirements.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CAsyncSocket::Close Crashes

staticv12-Aug-09 2:26

staticv

12-Aug-09 2:26

Hey, im doing some client/server stuff in a windows service. Pretty much new to this stuff using Visual C++ 6

The problem I'm encountering is that when I try to stop the service through Service Manager, it crashes. I added some MessageBoxes code, to trace where they are crashing and I found that when it closes the listener socket it crashes!!!

I tried to run the service as a console application, and by myself called the function which is called SERVICE__CONTROL__STOP event is received so that I may reproduce the bug and debug easily. But it is working fine. The windows service is only crashing when I stop it through Service Manager

Here is some code

The main function

int main(int argc, char* argv[])
{   
 // Create the service object
    CTestService CustomServiceObject;

    if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
    {
        std::cerr << "MFC failed to initialize!" << std::endl;
        return 1;
    }

    // Parse for standard arguments (install, uninstall, version etc.)
    if (! CustomServiceObject.ParseStandardArgs(argc, argv)) 
    {
        // StartService() calls ::StartServiceCtrlDispatcher() 
    // with the ServiceMain func and stuff
        CustomServiceObject.StartService();
    }

    // When we get here, the service has been stopped
    return CustomServiceObject.m_Status.dwWin32ExitCode;
}

The Service Handler callback function

// static member function (callback) to handle commands from the
// service control manager
void CNTService::Handler(DWORD dwOpcode)
{
    // Get a pointer to the object
    CNTService* pService = m_pThis;

    pService->DebugMsg("CNTService::Handler(%lu)", dwOpcode);
    switch (dwOpcode) {
    case SERVICE_CONTROL_STOP: // 1
        pService->SetStatus(SERVICE_STOP_PENDING);
        pService->OnStop();

    // ..
    // .. 
    // other event handling
    // ..
    // ..
}

the OnStop() function

void CTestService::OnStop()
{
    m_sListener.ShutDown(2);
    m_sConnected.ShutDown(2);

    MessageBox(NULL, "After Shutdown", NULL, IDOK); 

    m_sConnected.Close();

    MessageBox(NULL, "Closed connected socket", NULL, IDOK); 

    // crashes here when I try to stop through service manager
    // but if I run as console application works fine and terminates successfully
    m_sListener.Close();

    MessageBox(NULL, "Closed listener socket", NULL, IDOK); 

    ::PostThreadMessage(m_dwThreadID, WM_QUIT, NULL, NULL);

    MessageBox(NULL, "After PostThreadMessage", NULL, IDOK);
}

Moreover, I compiled the code in in VC2008, compiled fine, without any changes and the above code was running fine as expected but only in Release build. In Debug build, I couldn't even start the service, instead got an error that the service does not respond to control requests in a timely fashion Laugh | :laugh:

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Re: CAsyncSocket::Close Crashes

includeh1012-Aug-09 7:50

includeh10

12-Aug-09 7:50

many many my programs are running excellent in release but crashes at once in debug (I even can't see any interface) - I think this is microsoft's problem, we do not need to take responsibilities for it, I never worry about it at all.

So take it easy.

Re: CAsyncSocket::Close Crashes

staticv12-Aug-09 19:59

staticv

12-Aug-09 19:59

Well, if it crashes then there is a problem Smile | :)

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Re: CAsyncSocket::Close Crashes

Moak13-Aug-09 13:30

Moak

13-Aug-09 13:30

Could you provide more information where it crashes in the debug build, including a stack trace? Is it your code or which line of the MFC source code causes the problem, perhaps it's an ASSERT?

/M

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Re: CAsyncSocket::Close Crashes

staticv13-Aug-09 19:55

staticv

13-Aug-09 19:55

Since, it is a Windows Service, and I'm using MSVC6, I'm really unable to debug it.

When I call the Close method for CAsyncSocket class, the program crashes. So it seems that there is some problem in MFC's code.

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Re: CAsyncSocket::Close Crashes

Moak13-Aug-09 21:44

Moak

13-Aug-09 21:44

If you are not able to attach a debugger to the process, how about a simulated stop of the service handler? Maybe write a mockup framework that would trigger your code under similar conditions. Just a guess, you are not using CAsyncSocket in multiple worker threads, everything is one thread context?

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Re: CAsyncSocket::Close Crashes

staticv14-Aug-09 5:12

staticv

14-Aug-09 5:12

I call the function which is called when the SERVICE_CONTROL_STOP event is fired by myself. But I'm unable to reproduce that crash. It only occurs when it is stopped by Service Manager. No I'm not using CAsyncSocket in multiple threads

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How get the CPU information ?

bzsolt9112-Aug-09 2:11

bzsolt91

12-Aug-09 2:11

Hello,
How can i get the CPU information under VC++ (cpu modelname,cpu speed).
THNX for help!

Re: How get the CPU information ?

Garth J Lancaster12-Aug-09 2:28

Garth J Lancaster

12-Aug-09 2:28

this gives you some of the info - not sure if speed is in there ...

http://msdn.microsoft.com/en-us/library/hskdteyh(VS.80).aspx[^]

[edit]
this from gamedev shows some interesting things - Ive seen the same method for getting the speed used before ...

#include <windows.h>
#include <intrin.h>

//============================================================================
// Read the CPU speed from the registry
//============================================================================
DWORD ReadCPUSpeedFromRegistry(DWORD dwCPU)
{
HKEY hKey;
DWORD dwSpeed;

	// Get the key name
	wchar_t szKey[256];
	_snwprintf(szKey, sizeof(szKey)/sizeof(wchar_t),
		L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\%d\\", dwCPU);

	// Open the key
	if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,szKey, 0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
	{
		return 0;
	}

	// Read the value
	DWORD dwLen = 4;
	if(RegQueryValueEx(hKey, L"~MHz", NULL, NULL, (LPBYTE)&dwSpeed, &dwLen) != ERROR_SUCCESS)
	{
		RegCloseKey(hKey);
		return 0;
	}

	// Cleanup and return
	RegCloseKey(hKey);
    return dwSpeed;
}

//============================================================================
// Calculate and log the CPU speed and features
//============================================================================
void LogCPU()
{
unsigned nHighestFeature;
unsigned nHighestFeatureEx;
int nBuff[4];
char szMan[13];
char szFeatures[256];
unsigned nProcessorType;

	// Get CPU manufacturer and highest CPUID
	__cpuid(nBuff, 0);
	nHighestFeature = (unsigned)nBuff[0];
	*(int*)&szMan[0] = nBuff[1];
	*(int*)&szMan[4] = nBuff[3];
	*(int*)&szMan[8] = nBuff[2];
	szMan[12] = 0;
	if(strcmp(szMan, "AuthenticAMD") == 0)
		nProcessorType = PROCESSOR_AMD;
	else if(strcmp(szMan, "GenuineIntel") == 0)
		nProcessorType = PROCESSOR_INTEL;
	else
		nProcessorType = PROCESSOR_UNKNOWN;

	// Get highest extended feature
	__cpuid(nBuff, 0x80000000);
	nHighestFeatureEx = (unsigned)nBuff[0];

	// Get processor brand name
	if(nHighestFeatureEx >= 0x80000004)
	{
		char szCPUName[49];
		szCPUName[0] = 0;
		__cpuid((int*)&szCPUName[0], 0x80000002);
		__cpuid((int*)&szCPUName[16], 0x80000003);
		__cpuid((int*)&szCPUName[32], 0x80000004);
		szCPUName[48] = 0;
		for(int i=(int)strlen(szCPUName)-1; i>=0; --i)
		{
			if(szCPUName[i] == ' ')
				szCPUName[i] = '\0';
			else
				break;
		}

		ELog::Get().SystemFormat(L"PERF    : CPU: %S (%S)\n", szCPUName, szMan);
	}
	else
		ELog::Get().SystemFormat(L"PERF    : CPU: %S\n", szMan);

	// Get CPU features
	szFeatures[0] = 0;
	if(nHighestFeature >= 1)
	{
		__cpuid(nBuff, 1);
		if(nBuff[3] & 1<<0)
			strcat(szFeatures, "FPU ");
		if(nBuff[3] & 1<<23)
			strcat(szFeatures, "MMX ");
		if(nBuff[3] & 1<<25)
			strcat(szFeatures, "SSE ");
		if(nBuff[3] & 1<<26)
			strcat(szFeatures, "SSE2 ");
		if(nBuff[2] & 1<<0)
			strcat(szFeatures, "SSE3 ");

		// Intel specific:
		if(nProcessorType == PROCESSOR_INTEL)
		{
			if(nBuff[2] & 1<<9)
				strcat(szFeatures, "SSSE3 ");
			if(nBuff[2] & 1<<7)
				strcat(szFeatures, "EST ");
		}

		if(nBuff[3] & 1<<28)
			strcat(szFeatures, "HTT ");
	}

	// AMD specific:
	if(nProcessorType == PROCESSOR_AMD)
	{
		// Get extended features
		__cpuid(nBuff, 0x80000000);
		if(nHighestFeatureEx >= 0x80000001)
		{
			__cpuid(nBuff, 0x80000001);
			if(nBuff[3] & 1<<31)
				strcat(szFeatures, "3DNow! ");
			if(nBuff[3] & 1<<30)
				strcat(szFeatures, "Ex3DNow! ");
			if(nBuff[3] & 1<<22)
				strcat(szFeatures, "MmxExt ");
		}

		// Get level 1 cache size
		if(nHighestFeatureEx >= 0x80000005)
		{
			__cpuid(nBuff, 0x80000005);
			ELog::Get().SystemFormat(L"PERF    : L1 cache size: %dK\n", ((unsigned)nBuff[2])>>24);
		}
	}

	// Get cache size
	if(nHighestFeatureEx >= 0x80000006)
	{
		__cpuid(nBuff, 0x80000006);
		ELog::Get().SystemFormat(L"PERF    : L2 cache size: %dK\n", ((unsigned)nBuff[2])>>16);
	}

	// Log features
	ELog::Get().SystemFormat(L"PERF    : CPU Features: %S\n", szFeatures);

	// Get misc system info
	SYSTEM_INFO theInfo;
	GetSystemInfo(&theInfo);

	// Log number of CPUs and speeds
	ELog::Get().SystemFormat(L"PERF    : Number of CPUs: %d\n", theInfo.dwNumberOfProcessors);
	for(DWORD i=0; i<theInfo.dwNumberOfProcessors; ++i)
	{
		DWORD dwCPUSpeed = ReadCPUSpeedFromRegistry(i);
		ELog::Get().SystemFormat(L"PERF    : * CPU %d speed: ~%dMHz\n", i, dwCPUSpeed);
	}
}

//============================================================================
// Calculate and log the amount of RAM in the machine
//============================================================================
void LogRAM()
{
	// Get memory status
	MEMORYSTATUS theStatus;
	ZeroMemory(&theStatus,sizeof(theStatus));
	theStatus.dwLength = sizeof(theStatus);
	GlobalMemoryStatus(&theStatus);

	// Log it
	DWORD dwRAM = (DWORD)(theStatus.dwTotalPhys/(1024*1024));
	if(theStatus.dwTotalPhys != dwRAM*1024*1024)
		++dwRAM;
	ELog::Get().SystemFormat(L"PERF    : Available physical RAM: %dMB/%dMB\n",
		theStatus.dwAvailPhys/(1024*1024), dwRAM);
}

//============================================================================
// Cetermine OS type
//============================================================================
void LogOS()
{
wchar_t szOS[256];
OSVERSIONINFOEX osInfo;
SYSTEM_INFO sysInfo;

	// Get system info
	ZeroMemory(&sysInfo, sizeof(sysInfo));
	GetSystemInfo(&sysInfo);

	// Get OS version
	wcscpy(szOS, L"PERF    : OS: ");
	ZeroMemory(&osInfo, sizeof(osInfo));
	osInfo.dwOSVersionInfoSize = sizeof(osInfo);
	if(!GetVersionEx((OSVERSIONINFO*)&osInfo))
	{
		ZeroMemory(&osInfo, sizeof(osInfo));
		osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
		GetVersionEx((OSVERSIONINFO*)&osInfo);
	}

	// Win 9x
	if(osInfo.dwPlatformId == 1)
	{
		if((osInfo.dwMajorVersion == 4) && (osInfo.dwMinorVersion == 0))
			wcscat(szOS, L"Windows 95 ");
		else if((osInfo.dwMajorVersion == 4) && (osInfo.dwMinorVersion == 10))
			wcscat(szOS, L"Windows 98 ");
		else if((osInfo.dwMajorVersion == 4) && (osInfo.dwMinorVersion == 90))
			wcscat(szOS, L"Windows ME ");
		else
			wcscat(szOS, L"Unknown Windows OS ");
	}

	// Win NT
	else if(osInfo.dwPlatformId == 2)
	{
		if((osInfo.dwMajorVersion == 4) && (osInfo.dwMinorVersion == 0))
			wcscat(szOS, L"Windows NT 4.0 ");
		else if((osInfo.dwMajorVersion == 5) && (osInfo.dwMinorVersion == 0))
			wcscat(szOS, L"Windows 2000 ");
		else if((osInfo.dwMajorVersion == 5) && (osInfo.dwMinorVersion == 1))
			wcscat(szOS, L"Windows XP ");
		else if((osInfo.dwMajorVersion == 5) && (osInfo.dwMinorVersion == 2))
		{
			if(GetSystemMetrics(89))	// SM_SERVERR2 == 89
				wcscat(szOS, L"Windows Server 2003 R2 ");
			else if((osInfo.wProductType == VER_NT_WORKSTATION) &&
				(sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64))
			{
				wcscat(szOS, L"Windows XP Professional x64 Edition ");
			}
			else
				wcscat(szOS, L"Windows Server 2003 ");
		}
		else if((osInfo.dwMajorVersion == 6) && (osInfo.dwMinorVersion == 0))
			wcscat(szOS, L"Windows Vista ");
		else
			wcscat(szOS, L"Unknown WinNT OS ");
	}

	// Unknown
	else
		wcscat(szOS, L"Unknown Operating System ");

	wcscat(szOS, osInfo.szCSDVersion);
	wcscat(szOS, L"\n");

	// Log
	ELog::Get().SystemLog(szOS);
#if defined(BUILD_X64)
	ELog::Get().SystemLog(L"PERF    : Win64 version\n");
#elif defined(_WIN32)
	ELog::Get().SystemLog(L"PERF    : Win32 version\n");
#else
	ELog::Get().SystemLog(L"PERF    : Unknown version\n");
#endif
}

[/edit]

Re: How get the CPU information ?

bzsolt9112-Aug-09 13:15

bzsolt91

12-Aug-09 13:15

In vc++ got some error.

For example error C2653: 'ELog' : is not a class or namespace name.

I can't compile it.

Re: How get the CPU information ?

Rajesh R Subramanian12-Aug-09 2:42

Rajesh R Subramanian

12-Aug-09 2:42

You might try the Win32_Processor[^] class. Also, take a look at this page: Retrieving current CPU clock speed under Windows[^]

It is a crappy thing, but it's life -^ Carlo Pallini

CSocket Problem on Windows Mobile with WLAN

Member 224636612-Aug-09 1:58

Member 2246366

12-Aug-09 1:58

Hi,

I'm working on a Windows Mobile application that connects to a server on a PC.
The problem with the following lines:

CSocket as;
if(!as.Create())
MessageBox(_T("creation failed"));
if(as.Connect(_T("192.168.1.24"), 110))
MessageBox(_T("connected"));
else
MessageBox(_T("failed to connect"));

is, that Connect(...) allways returns TRUE, even if the server isn't started and even if the PC with the IP address 192.168.1.24 is switched off.
This error only occures with Windows Mobile and a WLAN connection. On Windows XP/Vista connected via WLAN/LAN or Windows Mobile connected via USB Connect(...) returns FALSE when there's no server.

Any hints?

Thanks,

Thomas

ps.: to be a bit more precise - the problematic connection is from a PDA via WLAN to a Netgear internet router and the PC is connected via LAN

Doubleclick on MDI Frame

baerten12-Aug-09 1:34

baerten

12-Aug-09 1:34

Hi everybody,

I like to catch the doubleclick on the MDI Frame.
Not somewhere into the Frame, rather on the titlebar of the frame itself.

In PreTranslateMessage of the MDIChildWnd I tried already to catch the message
WM_LBUTTONDBLCLK, but it seems that this message is never handled to this frame.

Has anyone an idea?

Big thanks Smile | :)

Re: Doubleclick on MDI Frame

Stuart Dootson12-Aug-09 6:32

Stuart Dootson

12-Aug-09 6:32

Knowing how frames work for normal windows, I suspect you want to look for WM_NCLBUTTONDBLCLK, i.e. the non-client area equivalent of WM_LBUTTONDBLCLK

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