Hello,
I am using the Socket Communications CF Card Rev. G with the CSR chipset=20
and the bcsp protocol in my Zaurus C750 with Kernel 2.4.18.
It is working fine (thank you, guys).
hicattach opens the card with a speed of 230 KBit/s. This is the speed=20
the CSR chipset is initialized after reset. I am using PAN, and I get a=20
file transfer rate of about 150 KBit/s. With other bluetooth devices=20
(USB dongle) I get about 550-600 KBit/s.
I have asked Socket Communications if the card is limited to slow=20
baudrates, and they have answered me that this card is able to perform=20
about 730 KBit/s under ideal conditions.
Obviously, this is not possible with a serial UART and 230 KBit/s.
So there must be a speed change command, and I want to use it.
Can anybody give me some usefull advice how to proceed?=20
I am able to write/change kernel drivers, but I have no hint where to=20
start and how to get the speed change information in the bcsp protocol.
best regards
Wolfgang M=FCes
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Hi Wolfgang,
> > this is simple. Try "hciattach <dev> socket 460800".
>
> Been there - done that.
>
> "BCSP initalisation timed out"
>
> 230400 Baud is the only baud rate which is working. Do I need a special
> version of the hciattach utility?
check the mailing list archives for a thread about BCSP and changing the
baud rate. This is not very easy and the CSR guys explained it in very
details.
Regards
Marcel
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Hello Marcel,
Am Samstag, 29. Mai 2004 11:00 schrieb Marcel Holtmann:
> this is simple. Try "hciattach <dev> socket 460800".
Been there - done that.
"BCSP initalisation timed out"
230400 Baud is the only baud rate which is working. Do I need a special
version of the hciattach utility?
best regards
Wolfgang M=FCes
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Hi Wolfgang,
> I am using the Socket Communications CF Card Rev. G with the CSR chipset
> and the bcsp protocol in my Zaurus C750 with Kernel 2.4.18.
> It is working fine (thank you, guys).
>
> hicattach opens the card with a speed of 230 KBit/s. This is the speed
> the CSR chipset is initialized after reset. I am using PAN, and I get a
> file transfer rate of about 150 KBit/s. With other bluetooth devices
> (USB dongle) I get about 550-600 KBit/s.
>
> I have asked Socket Communications if the card is limited to slow
> baudrates, and they have answered me that this card is able to perform
> about 730 KBit/s under ideal conditions.
>
> Obviously, this is not possible with a serial UART and 230 KBit/s.
> So there must be a speed change command, and I want to use it.
>
> Can anybody give me some usefull advice how to proceed?
> I am able to write/change kernel drivers, but I have no hint where to
> start and how to get the speed change information in the bcsp protocol.
this is simple. Try "hciattach <dev> socket 460800".
Look at the manpage and the source code of hcitattch, because the kernel
hasn't really to do anything with it.
Regards
Marcel
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