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Altera_Forum's avatar
Altera_Forum
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12 years ago

#pragma pack doesn't work correctly

NIOSII, eclipse For a serial communication (TCP/UDP) I use pragma pack in order to simply copy incoming bytes from the interface and map a structure on it. Long time, it worked fine, but now ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Try using __attribute__((aligned(1))) instead.

Although it really is best to align the data structures.

To access misaligned data the compiler has to generate code to do byte memory cycles and shifts.