How can I convert a hexadecimal string from two's complement to a signed int?
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Hello,
In a CCS code that i have produced, my data comes in two's complement, wich is stored as a hexadecimal number.
Than i send it to matlab by serial port, and it's read as a string (example: 'FFDF').
I know that FFDF is equal to -33, but how do i make that convertion in matlab?
Thank you,
Josué Jones
1 个评论
回答（2 个）
Jan
2012-8-18
Similar to Walter's method, but the builtin function hex2dec is slow, while sscanf converts hexadecimal values very fast:
typecast(uint16(sscanf('FFDF', '%x')), 'int16')
3 个评论
Jonathon
2014-12-29
This was tremendously useful for converting my fixed-point coefficients from fixed-point matlab objects to standard integers. Exactly what I needed. Thanks so much!
manoj hanu
2019-8-15
Is there a possibility of using the same on a complete column of 16bit Hex values in a table ?? DataType being 'cell array of character vectors'
Walter Roberson
2019-8-15
typecast(uint16(cellfun(@(S) sscanf(S, '%x'), YourCell)), 'int16')
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