Convert binary file from hex little endian to decimal

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Daniel Carlson
Daniel Carlson 2019-10-9
回答： Daniel Carlson 2019-10-14
Hi- my first post so go easy.
I get data from a sensor via a RockBlock Iridium Modem. The data come in 50 byte messages. I get an email with the data in Hex (little endian) - here is an example
85cd0a0084a7f6ff884027000b27e5cc0a0031a6f6ff885026000d427acc0a0096a4f6ff886026000c322900605a0002003c
I also get a binary file with the data.
I would like to read the binary file and decode it in matlab. I tried to attach my binary data file but it was not a supported file format so I've included a link to it here
For example, the first 8 bytes correspond to the latitude. I need to convert from little endian to big endian and then to decimal.
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Stephen23
Stephen23 2019-10-9
编辑：Stephen23 2019-10-9
@Daniel Carlson : changing the file extension to .txt is preferred, not everyone wishes to download binary files with MS Office (i.e. trojan and virus-carrying) file extensions, which can trigger all sorts of responses from the OS, virus blockers, etc.
dpb
dpb 2019-10-10
"changing the file extension to .txt is preferred, not everyone wishes to download binary files "
OK, so choose to download or not or have the same content with (purposely) misleading name? It's not like coders don't write stream files as the case here...

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采纳的回答

Daniel Carlson
Daniel Carlson 2019-10-14
So, I think I figured it out.
fname = '300434063383360-608.bin';
fid = fopen(fname);
A = fread(fid);
H = lower(dec2hex(A));
hxstr = [];
for i = 1:length(H)
hxstr = [hxstr H(i,:)];
end
fclose(fid);

更多回答（1 个）

Steven Lord
Steven Lord 2019-10-9
The fopen function allows you to specify a machine format when you open the file for reading. Then you can read the data in using the low-level file I/O functions.
If you've already read your data into MATLAB, the swapbytes, typecast, and hex2dec functions may be of use to you.
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Daniel Carlson
Daniel Carlson 2019-10-10
Yes, familiar with fopen, but not getting the results that I need. I have this excel worksheet, but having trouble replicating it in Matlab.

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