Measurement Computing TempBook rev.3.0 - Manual (Page 144)

11-20 daqCommand Reference (Enhanced API) TempBook User’s Manual
daqClose
DLL Function daqClose(DaqHandleT handle);
C daqClose(DaqHandleT handle);
Visual BASIC VBdaqClose&(ByVal handle&)
Delphi daqClose(handle:DaqHandleT)
Parameters
handle Handle to the device to be closed
Returns DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqOpen
Program References ADCEX1.C, DACEX1.C, DIGEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ADCEX.PAS, ERREX.PAS (Delphi)
Used With All devices
daqClose is used to close a Daq* device. Once the specified device has been closed, no
subsequent communication with the device can be performed. In order to re-establish
communications with a closed device, the device must be re-opened with the daqOpen function.
daqCvtRawDataFormat
DLL Function daqCvtRawDataFormat(PWORD buf , DaqAdcCvtAction action, DWORD lastRetCount, DWORD
scanCount, DWORD chanCount);
C daqCvtRawDataFormat(PWORD buf , DaqAdcCvtAction action, DWORD lastRetCount, DWORD
scanCount, DWORD chanCount);
Visual BASIC VBdaqCvtRawDataFormat&(buf%, ByVal action&, ByVal lastRetCount&,ByVal
scanCount&, ByVal chanCount&)
Delphi daqCvtRawDataFormat(PWORD buf, action:DaqAdcCvtAction; lastRetCount:DWORD ;
scanCount:DWORD: chanCount:DWORD);
Parameters
buf Pointer to the buffer containing the raw data
action The type of conversion action to perform on the raw data
lastRetCount The last retCount returned from daqAdcTransferGetStat
scanCount The length of the raw data buffer in scans
chanCount The number of channels per scan in the raw data buffer
Returns DerrNoError - No error (also, refer to API Error Codes on page 11-39)
See Also daqAdcSetDataFormat
Program References None
Used With All devices
daqCvtRawDataFormat allows the conversion of raw data to a specified format. This function
should be called after the raw data has been acquired. See the transfer data functions
(daqAdcTransfer…) for more details on the actual collection of raw data.
The buf parameter specifies the pointer to the data buffer containing the raw data. Prior to calling
this function, this user-allocated buffer should already contain the entire raw data transfer. Upon
completion, this data buffer will contain the converted data (the buffer must be able to contain all the
converted data).
The action parameter specifies the type of conversion to perform. The DacaUnpack value can
be used de-compress raw data. The DacaRotate can be used to reformat a circular buffer into a
linear buffer.
The scanCount parameter specifies the length of the raw buffer in scans. Since the converted data
will overwrite the raw data in the buffer, make sure the specified buffer is large enough, physically,
to contain all of the converted data.
The chanCount parameter specifies the number of channels in each scan.