Chris, On Fri, Apr 8, 2011 at 5:02 PM, Chris Vine <chris@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 8 Apr 2011 18:36:41 -0500 > "Mikhail Titov" <mlt@xxxxxx> wrote: >> Just use something like __attribute__ ((__packed__)) for your >> structure and you can always cast back and forth from the pointer to >> your structure to an array of bytes (char*). Just make sure that both >> systems have same ending (little or big) and that members' order is >> correct. Otherwise you'll have to swap data within let's say >> m_voltageMask . > > This attribute is compiler specific. He would also have to be careful > to avoid breaking strict aliasing with his casting, or he could have the > compiler "optimize" away some of his code. It is relatively easy to > avoid that (make sure you start with the type you finish with), but I > am not convinced the OP is necessarily up to speed on how to do it > defensively. Yes, this is my first project with an Embedded development. ;-) > > Because this provides unaligned access (on gcc) it can also be > significantly inefficient on particular architectures. So, what is the best course of action? I just tested the program on the device and on x86. On x86 it produced correct results, whereas on the ARM device it didn't. So it looks like I will have to switch the endianess when running on the ARM? No, Chris, what is the best way to do it? Thank you. > > Chris > > > _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
