Hi, I was wondering why you haven't set the STRICT_ALIGNMENT macro to 1 in the msp430.h header file. (gcc-version/gcc/config/msp430/msp430.h) The gcc documentation on this flag says:
<quote> STRICT_ALIGNMENT Define this macro to be the value 1 if instructions will fail to work if given data not on the nominal alignment. If instructions will merely go slower in that case, define this macro as 0. </quote> The msp430's documentation mentions that this is the case. The documentation for the msp430 libc mentions a problem with memcpy where you copy 2 bytes. This problem is caused because the compiler does not take the alignment into account when using a builtin for this function. Also, when you use structs with the attribute 'packed' (causing the data to be misaligned) you get problems. These can all be solved by setting the STRICT_ALIGNMENT flag. True, your code does get about 8% bigger and is probably a bit slower, but the gcc output is correct more often. It might also be an idea to make it a command line switch that can turn off the strict alignment when it is not necessary, although I don't know how easy it is to do this in gcc. G. Halkes __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/
