Appendix C Watchdog Timer Program- ming on WinCE
There is a built-in watchdog timer in Windows CE 4.2 for TPC-1261H. You can access it through the WIN32 API. TPC-1261H provides a WDT driver to allow users to enable/disable the watchdog timer. The driver name is “WDT1:”. Programmers must open this driver before using the resources. Then programmers can use DeviceIOControl functions to enable/disable the watchdog timer. The introduction below includes DeviceIOControl, the definition of the parameter and an example.
C.1 DeviceIOControl
This function sends a control code directly to a specified device driver, causing the corresponding device to perform the specified operation.
BOOL DeviceIoControl(
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped );
