Digilent WaveForms - Manual (Page 10)

WaveForms™ SDK Reference Manual
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Page 10 of 85
4 Device Control
FDwfDeviceOpen(
int idxDevice, HDWF *phdwf)
Parameters:
-
idxDevice – Zero based index of the enumerated device.
- phdwf – Pointer to HDWF variable to receive opened interface handle by reference.
The function above opens a device identified by the enumeration index and retrieves a handle. To automatically
enumerate all connected devices and open the first discovered device, use index -1.
FDwfDeviceConfigOpen(
int idxDevice, int idxCfg, HDWF *phdwf)
Parameters:
-
idxDevice – Index of the enumerated device.
- idxCfg – Index of the device configuration.
- phdwf – Pointer to HDWF variable to receive opened interface handle by reference.
The function above opens a device identified by the enumeration index with the selected configuration and
retrieves a handle.
FDwfDeviceClose(HDWF hdwf)
Parameters:
-
hdwf – Interface handle to be closed.
The function above is used to close an interface handle when access to the device is no longer needed. Once the
function above has returned, the specified interface handle can no longer be used to access the device.
FDwfDeviceCloseAll()
Parameters: None.
The function above is used to close all opened devices by the calling process. It does not close all devices across all
processes.