Packed structs in CCE

Hi

Searching the MSP430 Optimizing C/C++ Compiler User's Guide I do not find any reference to the pragma pack directive. So, I think it is not supported (is this true?!)

I also like to know how to pack a structure with CCE.

Searching the web I find this nice article.

AES

After reading the previously article I search and find that we can enable the –gcc compiler option. This option allows us to use the GNU C Compiler Extensions, like specify the attributes of variables. Here you can find useful information about this subject.

So, after you active the –gcc option (in Properties > C/C++ Build > MSP430 Compiler 3.0 > Runtime Model Option) you will be allowed to make declarations like

int x __attribute__ ((aligned (16))) = 0;

or

short array[3] __attribute__ ((aligned));

Unfortunately, when I try to use the packed keyword compiler tells me that  this is an invalid attribute for field.

AES