How can I cast 4 octets in 32bit signed integer type ?

2014 10 2
2 个回答
更新时间：2014 10 2
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Hi,
How can I cast a suite of 4 octet/char to obtain an 32 bit signed integer (sint32).
For instance [198 90 72 0] => -967161856 (and not +3327805439).
An equivalent operator to "y = &(type *)&x" in C or to "cast" in LabVIEW.
Thanks,
Benjamin

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回答（2 个）

Iain
Iain 2014-10-2
编辑：Iain 2014-10-2

0 个投票

typecast(uint8([1 2 3 4]),'int32')
Benjamin
Benjamin 2014-10-2

0 个投票

Thanks for your answer, it works but before it needs to swap the octets :
data = [198 90 72 0];
signed_integer_32 = typecast(uint8(data(end:-1:1)),'int32')
Benjamin

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Benjamin
Benjamin
2014-10-2

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Benjamin
Benjamin
2014-10-2

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