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Re: [bluetooth-dev] Open BT stack on ARM7TDMI
Bill Pringlemeir wrote:
> >>>>> "JN" == Jenny Nyberg <email@example.com> writes:
> JN> Hi, I am beginner with the axis bluetooth stack and would like to
> JN> know whether there is a guideline for porting the stack to an
> JN> ARM7TDMI environment. Is there any script/makefile which I could
> JN> directly use
> Since the ARM7TDMI is an ARM without an MMU, you would need to use a
> version of Linux that runs without an MMU. For instance, uCLinux.
> Some people have done work to make the stack run with an SA110 (which
> is a `netwinder' that is available from www.rebel.com). This work
> would take care of most ARM specific problems, such as alignement
> However, if you use uCLinux there will be more problems porting.
> Perhaps a newer version will merge uCLinux support.
We've used the stack with some success on a uCLinux platform without too many
porting problems. Trying to remember if we used a later version or the older
8/99 version... I think the later version because that's when we added the
Config.in to CVS so we could compile it into the kernel.
We used the bleeding-edge 2.4 uCLinux kernel for an ARM7. The porting issues
I found were some race conditions because our processor was so slow. Can't
remember if I checked in the fixes or not...
Not much help! But I can verify that it did work well enough to exchange some
data. Eventually we found that somehow we were dropping packets so we had to
ditch the project to meet a deadline. It could work if you use small data
transfers, or a reliable protocol above RFCOMM, or fix the bug ;).
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