Marcus Brown wrote:
>Hi guys,
>
>I very much doubt your conclusions,
>I cannot see any reason why full bandwidth cannot be achieved;
>however, don't forget that some of the protocols you may be using
>could be affecting measurement.
>Also, there is no guarantee that the BTUART serial port on the h2210
>is (yet) configured for full throughput.
>As I've also suggested in the past: the BT system allows for an additional
>3 voice channels which are capable of carrying 56Kb each.
>Combining all these channels together should give a theoretical throughput
>of 891Kb. (I forget the software to do this but mppp rings a bell:).
>
>
I think the problem is probably that PPC2003 is not setting the BTUART
to full speed. Jamey says the schematics show the bluetooth chip to be
connected to the pxa255's BTUART, so the UART is not the bottleneck like
some older ipaqs. If I'm using haret correctly, PocketPC is setting the
divisor to 2, which would mean a baud rate something like 460.6kbps,
which is close to the throughput I was getting. I tried once to set it
to one, but then I couldn't get it to work at all. Hopefully that's just
because I'm disturbing PPC2003, not a hardware flaw.
Once linux is running well on here I can take Microsoft out of the
equation. :-)
Matt
Received on Thu Feb 19 14:17:35 2004
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