从示波器中捕获的波形处理，此代码源于https://ww2.mathworks.cn/matlabcentral/fileexchange/14918-tektronix-wfm-file-reader

function:

1 function [out_descript, outdata, timedata] = wfm_ascii_dpo(fname, data_start, data_stop)

2 % Converts TSD5/6/7k and DPO7k/70k .wfm file to ASCII format

3 % with time array

4 %

5 % data_start and data_stop input arguments are optional

6 % and can be used to read parts of file

7 %

8 % To do: implement fast frame, pixel maps

9 %

10 out = [];

11 if nargin==0

12 fname='';

13 end

14 if isempty(fname)

15 [filename,pname]=uigetfile({'*.wfm', 'Tektronix Waveform Files (*.wfm)';'*.*', 'All Files (*.*)'},'Choose Tektronix WFM file');

16 fname=[pname filename];

17 end

18 %---Open file

19 fd = fopen(fname,'r');

20 if fd==-1

21 error('Problem opening file "%s"',fname)

22 end

23 %---Determine byte ordering, then close and reopen with proper byte ordering

24 ByteOrder = fread(fd,1,'ushort');

25 if ByteOrder==61680

26 fclose(fd);

27 fd = fopen(fname,'r','ieee-be');

28 else

29 fclose(fd);

30 fd = fopen(fname,'r','ieee-le');

31 end

32 %---WFM static file information

33 out.ByteOrder = fread(fd, 1,'ushort' );

34 out.