RE: [avr-gcc-list] port access with avr-gdb

[Theodore A. Roth]

On Wed, 16 Jun 2004, Larry Barello wrote:

> I put this header together for the mega8...  I checked out accesses via a
> zero pointer and, indeed, the compiler did the right thing for all accesses:
> LDS/STS, IN, OUT and SBI/CBI when appropriate.
>
> Maybe GCC should consider replacing the archaic #define headers with
> structs, like this one?  Being able to do direct bit access is pretty nice
> (rather than PORTB |= BV(PORTB1);) Or, maybe just adding this struct to the
> current headers so either way could be used.
>
> Cheers!
>
> P.S. if attachments are stripped, I'll stick this somewhere public...

Looks like it got stripped. I'm interested in seeing what you've done...

>
> -----Original Message-----
> From:  Dave Hylands
>
> One way to get the registers to show up symbolically, is to create a
> structure which has the same layout as the registers. Then you can access
> through a null pointer. This would allow you to see the registers in GDB.
> They still wouldn't show up I nthe linker map though.
>
> There are ways of making them show up in the linker map too. Just create an
> asm file which has each of the registers named. On the C side you'd have
> appropriate externs decalred.
>
> -
>

---
Ted Roth
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