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How do i interpret a data received serial ?

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Constantin
Constantin 2013-5-15
关闭： MATLAB Answer Bot 2021-8-20
I receive from serial a message(60 bytes) divided in 17 data types.I need to extract 1 data of 4 bytes.I tried to get it byte with byte,and using shifting operation I fused those 4 bytes together.The problem is that those bytes represent a signed int number and I don't know how to convert that binary number into a signed int.

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回答（1 个）

Walter Roberson
Walter Roberson 2013-5-15
You do not need to use shifting.
t = [byte1, byte2, byte3, byte4];
t_as_signed = typecast(t, 'int32');

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