Thanks,
Also for the serJTAG stuff. My thanks as well to TI.
Chris Liechti wrote:
>
> Am 06.09.2002 23:35:14, schrieb "Garst R. Reese" <[email protected]>:
>
> >Can someone enlighten me on the meaning of sfrb in the following ?
> >#define ME1_ 0x0004 /* Module Enable 1 */
> >sfrb(ME1,ME1_);
>
> noooo dont ask ;-)
>
> the macro is defined in <iomacros.h> it's a rather tricky macro to convince
> GCC that it can access that address as variable and that it's
> volatile (must not be cached in a register). (just defining a volatile
> variable at address x does generate less efficient code, e.g. "bic"
> and "bis" asm insn are not used directly, rather a its a read, modify, store
> sequence)
>
> i don't know the real the reason that it's split in two parts, a define and
> ans sfrb(), our files are just based on the TI ones, and those had
> this like that. maybe they thought that you could use the underline verison
> if you use the address for calculations or so.
>
> chris
