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How do i read binary file

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Hi guys,
I have to read from a binary file and transform to decimal for example the first 8 groups at 8 bit level and the folowing 7 groups at 56 bit level as integer.
I tried this :
fileID = fopen('test.bin');
precision = '1*uint8';
B = fread(fileID,[1,1],precision);
%% I know this read only the first group and its mean 0 but for example I want to skip the first 8 groups and read after them the following 7 at 56 bit level
%% And after that I want to read specific groups at the same 56 bit level
%% I think I made my self clear otherwise please ask me if something that you dont understand.
Thanks!

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Accepted Answer

Ameer Hamza
Ameer Hamza on 19 Oct 2020
Try this
fileID = fopen('test.bin');
precision = '1*uint8';
fseek(fileID, 8, 0); % skip 8 bytes
B = fread(fileID,[1,7],precision); % read 7 bytes

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Cristian Martin
Cristian Martin on 20 Oct 2020
Yes, for example I want to gather data from a file which data's are updated continuasly, let's say I want to run the above code for 20sec after that a pause of 5sec and runnit again, but would be preferable the code to run from the stopped point and not to run from the beginning of the file.
Ameer Hamza
Ameer Hamza on 20 Oct 2020
I haven't experimented with reading the file, which is also being updated. You need to do some tests whether it works correctly and next fread() will read the new data correctly. For periodic execution of the code, check timers.
Cristian Martin
Cristian Martin on 20 Oct 2020
It's working I already tried and it's OK, the result is updated every time I hit Run. But I guess I have Tu figure how is with the timers... Thanks...

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