matlab_tdm_example

用Matlab打开tdms文件，为后续数据处理奠定基础。

clc;

%Recreate needed property constants defined in nilibddc_m.h
DDC_FILE_NAME					=	‘name‘;
DDC_FILE_DEscriptION			=	‘description‘;
DDC_FILE_title					=	‘title‘;
DDC_FILE_AUTHOR					=	‘author‘;
DDC_FILE_DATETIME				=	‘datetime‘;
DDC_CHANNELGROUP_NAME			=	‘name‘;
DDC_CHANNELGROUP_DEscriptION	=	‘description‘;
DDC_CHANNEL_NAME				=	‘name‘;

%Check if the paths to ‘nilibddc.dll‘ and ‘nilibddc_m.h‘ have been
%selected. If not prompt the user to browse to each of the files.
if exist（‘NI_TDM_DLL_Path‘‘var‘）==0
    [dllfiledllfolder]=uigetfile（‘*dll‘‘Select nilibddc.dll‘）;
    libname=strtok（dllfile‘.‘）;
    NI_TDM_DLL_Path=fullfile（dllfolderdllfile）;
end
if exist（‘NI_TDM_H_Path‘‘var‘）==0
    [hfilehfolder]=uigetfile（‘*h‘‘Select nilibddc_m.h‘）;
    NI_TDM_H_Path=fullfile（hfolderhfile）;
end

%Prompt the user to browse to the path of the TDM or TDMS file to read
[filepathfilefolder]=uigetfile（{‘*.tdm‘;‘*.tdms‘}‘Select a TDM or TDMS file‘）;
Data_Path=fullfile（filefolderfilepath）;

%Load nilibddc.dll （Always call ‘unloadlibrary（libname）‘ after finished using the library）
loadlibrary（NI_TDM_DLL_PathNI_TDM_H_Path）;

%Open the file （Always call ‘DDC_CloseFile‘ when you are finished using a file）
fileIn = 0;
[errdummyVardummyVarfile]=calllib（libname‘DDC_OpenFileEx‘Data_Path‘‘1fileIn）;

%Read and display file name property
filenamelenIn = 0;
%Get the length of the ‘DDC_FILE_NAME‘ string property
[errdummyVarfilenamelen]=calllib（libname‘DDC_GetFileStringPropertyLength‘fileDDC_FILE_NAMEfilenamelenIn）;
if err==0 %Only proceed if the property is found
    %Initialize a string to the length of the property value
    pfilename=libpointer（‘stringPtr‘blanks（filenamelen））;
    [errdummyVarfilename]=calllib（libname‘DDC_GetFileProperty‘fileDDC_FILE_NAMEpfilenamefilenamelen+1）;
    setdatatype（filename‘int8Ptr‘1filenamelen）;
    disp（[‘File Name: ‘ char（filename.Value）]）;
end

%Read and display file description property
filedesclenIn = 0;
%Get the length of the ‘DDC_FILE_DEscriptION‘ string property
[errdummyVarfiledesclen]=calllib（libname‘DDC_GetFileStringPropertyLength‘fileDDC_FILE_DEscriptIONfiledesclenIn）;
if err==0 %Only proceed if the property is found
    %Initialize a string to the length of the property value
    pfiledesc=libpointer（‘stringPtr‘blanks（filedesclen））;
    [errdummyVarfiledesc]=calllib（libname‘DDC_GetFileProperty‘fileDDC_FILE_DEscriptIONpfiledescfiledesclen+1）;
    setdatatype（filedesc‘int8Ptr‘1filedesclen）;
    disp（[‘File Description: ‘ char（filedesc.Value）]）;
end

%Read and display file title property
filetitlelenIn = 0;
%Get the length of the ‘DDC_FILE_title‘ string property
[errdummyVarfiletitlelen]=calllib（libname‘DDC_GetFileStringPropertyLength‘fileDDC_FILE_titlefiletitlelenIn）;
if err==0 %Only proceed if the property is found
    %Initialize a string to the length of the property value
    pfiletitle=libpointer（‘strin

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\
     文件     2306048  2009-10-20 03:48  MATLAB TDM Example\dev\bin\32-bit\dacasr.dll
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\DataModels\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\1_0\
     文件       18725  2009-10-20 03:44  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\1_0\usi_1_0.xsd
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\TDM\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\TDM\1_0\
     文件        6032  2009-10-20 03:44  MATLAB TDM Example\dev\bin\32-bit\DataModels\USI\TDM\1_0\USI_TDM_1_0.xml
     文件       24470  2009-10-20 05:16  MATLAB TDM Example\dev\bin\32-bit\embeddedUSICopyrights.chm
     文件      839680  2008-10-15 17:03  MATLAB TDM Example\dev\bin\32-bit\hdf5dll.dll
     文件      143360  2010-01-29 17:51  MATLAB TDM Example\dev\bin\32-bit\nilibddc.dll
     文件      671744  2008-10-16 17:02  MATLAB TDM Example\dev\bin\32-bit\stlport.5.0.dll
     文件      516608  2009-05-25 04:32  MATLAB TDM Example\dev\bin\32-bit\tdms_ebd.dll
     文件      602112  2009-10-20 03:52  MATLAB TDM Example\dev\bin\32-bit\uds.dll
     文件        2591  2009-04-23 17:02  MATLAB TDM Example\dev\bin\32-bit\USI_STLport_Notice.txt
     文件       11560  2009-04-23 17:02  MATLAB TDM Example\dev\bin\32-bit\USI_Xerces_License.txt
     文件         570  2009-04-23 17:02  MATLAB TDM Example\dev\bin\32-bit\USI_Xerces_Notice.txt
     文件      880640  2009-10-20 03:53  MATLAB TDM Example\dev\bin\32-bit\usiEx.dll
     文件      655360  2009-10-20 03:51  MATLAB TDM Example\dev\bin\32-bit\usiPluginTDM.dll
     文件      786432  2009-10-20 03:54  MATLAB TDM Example\dev\bin\32-bit\uspTdms.dll
     文件     1888256  2008-10-15 17:08  MATLAB TDM Example\dev\bin\32-bit\xerces-c_2_8_usi.dll
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\64-bit\
     文件     3460096  2009-10-20 04:47  MATLAB TDM Example\dev\bin\64-bit\dacasr.dll
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\64-bit\DataModels\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\64-bit\DataModels\USI\
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\64-bit\DataModels\USI\1_0\
     文件       18725  2009-10-20 03:44  MATLAB TDM Example\dev\bin\64-bit\DataModels\USI\1_0\usi_1_0.xsd
     目录           0  2010-04-30 17:54  MATLAB TDM Example\dev\bin\64-bit\DataModels\USI\TDM\
............此处省略46个文件信息