PCM-7130 User’s Manual 50
Examples:
#define IOCTL_ENABLE_WDT 0x1001
#define IOCTL_DISABLE_WDT 0x1002
#define IOCTL_GET_WDTPERIOD 0x1003
#define IOCTL_SET_WDTPERIOD 0x1004
#define IOCTL_ACCESS_WDT 0x1005
#define IOCTL_GET_SCREENOFFTIME 0x1006
#define IOCTL_SET_SCREENOFFTIME 0x1007
HANDLE m_hWDT=NULL;
TCHAR szClassName[60];
...
// assign the WDT driver name
wsprintf(szClassName, TEXT("WDT1:"));
// Open the DIO 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);
