Lpc2000

Robert Adsett wrote:
> At 06:18 PM 4/29/06 +0200, Jan Thogersen wrote:
> >It makes a lot of sense what you are saying. What I was trying to do was
> >moving bytes from a SD card into the structure.
> >The structure was made to follow the format of which the bytes was
> >aligned on the SD card. I thought that this was a very beautiful way of
> >doing it. I have seen code grabbing the struct byte by byte. However,
> >when I ran this code on a HCS12 CPU then I could just make a memcpy into
> >the struct and that was it. It was way more code size effective and much
> >nicer to look at.
> >
> >But I get your point about the portability! So there is two ways I can
> >solve this problem... Right? Either give the compiler a pragma to pack
> >the struct and live with the portability problems or rewrite my code to
> >grab the protocol byte by byte.
>
> That's about the size of it.  You take a performance hit either way.  
> With
> the pragma you get lower performance and larger code when you access the
> structure elements later in the code.  When you use  cracking routines to
> load and unload the structure in place of a memcpy you get the obvious
> time/size hit at the interface.
Ok. Tanks everyone!

I went for the quick fix... The pragma packed worked just fine!

Have a nice day.

Best regards
   Jan