function?BackData?=?ReadTDMSData（ChanNumStartNumNumToGetfilefolderfilepath）
%參數(shù)依次為：通道號/開始數(shù)據(jù)號/結(jié)束數(shù)據(jù)號/文件路徑/文件名
%導(dǎo)入庫和文件
%NilibddcLibInit（filefolderfilepath）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%調(diào)nilibddc庫文件，讀入數(shù)據(jù)文件%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%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‘）;
????dllfile=‘nilibddc.dll‘;
????dllfolder=‘F:\MATLAB?Program\Program\MATLAB_TDM_Example\dev\bin\64-bit‘;
????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‘）;
????hfile=‘nilibddc_m.h‘;
????hfolder?=‘F:\MATLAB?Program\Program\MATLAB_TDM_Example\dev\include\64-bit‘;
????NI_TDM_H_Path=fullfile（hfolderhfile）;
end

%Prompt?the?user?to?browse?to?the?path?of?the?TDM?or?TDMS?file?to?read
if?isa（filepath‘numeric‘）?&&?isa（filefolder‘numeric‘）
????if?filepath?==?0?&&?filefolder?==?0
????????[filepathfilefolder]=uigetfile（{‘*.tdms‘;‘*.tdm‘}‘Select?a?TDM?or?TDMS?file‘）;
????end
end
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）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%獲取組數(shù)，并對組賦句柄值%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Get?channel?groups
%Get?the?number?of?channel?groups
numgrpsIn?=?0;
[errnumgrps]=calllib（libname‘DDC_GetNumChannelGroups‘filenumgrpsIn）;
%Get?channel?groups?only?if?the?number?of?channel?groups?is?greater?than?zero
if?numgrps>0
	%Initialize?an?array?to?hold?the?desired?number?of?groups
????pgrps=libpointer（‘int64Ptr‘zeros（1numgrps））;
????[errgrps]=calllib（libname‘DDC_GetChannelGroups‘filepgrpsnumgrps）;??%得到不同組的句柄值
end??
%%%%%%%%%這段為了獲取numchans%%%%%%%%%%%
?numchansIn?=?0;
[errnumchans]=calllib（libname‘DDC_GetNumChannels‘grps（1）numchansIn）;
numgv?=?zeros（numgrpsnumchans）;
fo