Advantech SPC-57 Manuel d'utilisateur télécharger pdf (Page 79)

HANDLE m_hWDT=NULL;

TCHAR szClassName[60];

...

// assign the WDT driver name

wsprintf(szClassName, TEXT("WDT1:"));

// Open the WDT driver

m_hWDT = CreateFile(szClassName, GENERIC_READ | GENERIC_WRITE, 0,

NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

if ( m_hWDT == INVALID_HANDLE_VALUE )

{

DebugMsg(CString("WDT driver fail"));

return;

}

...

DWORD dwTemp;

DWORD nPeriod=10000;

// Set the Watchdog Timer as 10 seconds (10000 mini-seconds)

DeviceIoControl(m_hWDT, IOCTL_SET_WDTPERIOD, &nPeriod, 4, NULL, 0, &dwTemp, NULL);

// Enable the Watchdog timer

DeviceIoControl(m_hWDT, IOCTL_ENABLE_WDT, NULL, NULL, NULL, 0, &dwTemp, NULL);

While (1)

{

// do your job here...

Sleep(8000);

DeviceIoControl(m_hWDT, IOCTL_ACCESS_WDT, NULL, NULL, NULL, 0, &dwTemp, NULL);

}

DeviceIoControl(m_hWDT, IOCTL_DISABLE_WDT, NULL, NULL, NULL, 0, NULL, NULL);

CloseHandle(m_hWDT);

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Advantech SPC-57 Manuel d'utilisateur Page 79