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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
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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!!!
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There are many many MODBUS resources on the web, see, for instance, here.
CodeProject has some MODBUS related articles too [^].
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.
-- Iain Clarke
[My articles]
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here's one : use a serial to USB converter.
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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.
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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[])
{
CTestService CustomServiceObject;
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
std::cerr << "MFC failed to initialize!" << std::endl;
return 1;
}
if (! CustomServiceObject.ParseStandardArgs(argc, argv))
{
CustomServiceObject.StartService();
}
return CustomServiceObject.m_Status.dwWin32ExitCode;
}
The Service Handler callback function
void CNTService::Handler(DWORD dwOpcode)
{
CNTService* pService = m_pThis;
pService->DebugMsg("CNTService::Handler(%lu)", dwOpcode);
switch (dwOpcode) {
case SERVICE_CONTROL_STOP:
pService->SetStatus(SERVICE_STOP_PENDING);
pService->OnStop();
}
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);
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 
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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.
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Well, if it crashes then there is a problem
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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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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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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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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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Hello,
How can i get the CPU information under VC++ (cpu modelname,cpu speed).
THNX for help!
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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>
DWORD ReadCPUSpeedFromRegistry(DWORD dwCPU)
{
HKEY hKey;
DWORD dwSpeed;
wchar_t szKey[256];
_snwprintf(szKey, sizeof(szKey)/sizeof(wchar_t),
L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\%d\\", dwCPU);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,szKey, 0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
{
return 0;
}
DWORD dwLen = 4;
if(RegQueryValueEx(hKey, L"~MHz", NULL, NULL, (LPBYTE)&dwSpeed, &dwLen) != ERROR_SUCCESS)
{
RegCloseKey(hKey);
return 0;
}
RegCloseKey(hKey);
return dwSpeed;
}
void LogCPU()
{
unsigned nHighestFeature;
unsigned nHighestFeatureEx;
int nBuff[4];
char szMan[13];
char szFeatures[256];
unsigned nProcessorType;
__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;
__cpuid(nBuff, 0x80000000);
nHighestFeatureEx = (unsigned)nBuff[0];
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);
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 ");
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 ");
}
if(nProcessorType == PROCESSOR_AMD)
{
__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 ");
}
if(nHighestFeatureEx >= 0x80000005)
{
__cpuid(nBuff, 0x80000005);
ELog::Get().SystemFormat(L"PERF : L1 cache size: %dK\n", ((unsigned)nBuff[2])>>24);
}
}
if(nHighestFeatureEx >= 0x80000006)
{
__cpuid(nBuff, 0x80000006);
ELog::Get().SystemFormat(L"PERF : L2 cache size: %dK\n", ((unsigned)nBuff[2])>>16);
}
ELog::Get().SystemFormat(L"PERF : CPU Features: %S\n", szFeatures);
SYSTEM_INFO theInfo;
GetSystemInfo(&theInfo);
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);
}
}
void LogRAM()
{
MEMORYSTATUS theStatus;
ZeroMemory(&theStatus,sizeof(theStatus));
theStatus.dwLength = sizeof(theStatus);
GlobalMemoryStatus(&theStatus);
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);
}
void LogOS()
{
wchar_t szOS[256];
OSVERSIONINFOEX osInfo;
SYSTEM_INFO sysInfo;
ZeroMemory(&sysInfo, sizeof(sysInfo));
GetSystemInfo(&sysInfo);
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);
}
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 ");
}
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))
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 ");
}
else
wcscat(szOS, L"Unknown Operating System ");
wcscat(szOS, osInfo.szCSDVersion);
wcscat(szOS, L"\n");
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]
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In vc++ got some error.
For example error C2653: 'ELog' : is not a class or namespace name.
I can't compile it.
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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
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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 
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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
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
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Hai!
Is there any key in the registry which changes its value each time i install and uninstall the driver for a smart card reader!!
Thanks!
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There are many registry settings changing. What is the purpose of this question? Why do you need to know registry modifications?
There are too many to list and some are vendor specific. Locate the driver installation package for your smartcard device and open the INF file. Registry modifications are located in the 'AddReg' sections. You can also install an installation monitor and log the registry changes.
Best Wishes,
-David Delaune
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Hallo,
I have the following problem with the Thread:
I create the Thread first as SUSPENDED, but it does not start at the expectetd time.
First the Program calls this function:
ThreadStart();
///////////////////////////////
ThreadStart()
{
if (m_pSelThread != NULL)
{
if (::WaitForSingleObject(m_pSelThread->m_hThread, 0) != WAIT_OBJECT_0)
return;
delete m_pSelThread;
m_pSelThread = NULL;
}
::WaitForSingleObject(m_SEl_Start_Event, 0);
m_SEl_Start_Event.SetEvent (); // CEvent Object
CWinThread* m_pSelThread = AfxBeginThread(ThreadFunktion, this, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);
m_pSelThread->m_bAutoDelete = FALSE;
m_pSelThread->ResumeThread();
}
UINT ThreadFunktion
(
LPVOID param
)
{
if (param == NULL)
return -1;
DoSomeThing();
return 0;
}
The Thread does not come to the UINT ThreadFunktion(LPVOID param).
Any help would be appriciated.
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susanne1 wrote: CWinThread* m_pSelThread = AfxBeginThread(ThreadFunktion, this, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);
Shouldn't that be:
m_pSelThread = AfxBeginThread(ThreadFunktion, this, THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);
i.e. you're hiding the class member variable with the local one.
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.
-- Iain Clarke
[My articles]
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Okay i did it like that defining the Thread Pointer in the header File, but this deos not help.
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