[Bluez-devel] tcsendbreak and flow control on hciattach (csr chip)

[Bluez-devel] tcsendbreak and flow control on hciattach (csr chip)

[Rognlien Dag Kristian]

Hello,

If I enable both flow control and send break with hciattach:
hciattach -b ttyS1 csr 921600 flow

The unit fails to initialize. This does not happen if I disable flow
control, or send break.
The problem is also solved by setting a sleep of 0.5 seconds after the
tcsendbreak command in the hciattach.c code.

This is on an Intel XScale platform.

I use bluez libs and bluez utils 2.9 on a 2.4.21 kernel with the mh9
patch.

Any ideas for another solution than the usleep, or is this the best
solution?

Regards,
Dag K. W. Rognlien
Research Scientist
SINTEF ICT
Communication Systems


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Re: [Bluez-devel] tcsendbreak and flow control on hciattach (csr chip)

[Marcel Holtmann]

Hi Dag,

> If I enable both flow control and send break with hciattach:
> hciattach -b ttyS1 csr 921600 flow
> 
> The unit fails to initialize. This does not happen if I disable flow
> control, or send break.
> The problem is also solved by setting a sleep of 0.5 seconds after the
> tcsendbreak command in the hciattach.c code.
> 
> This is on an Intel XScale platform.
> 
> I use bluez libs and bluez utils 2.9 on a 2.4.21 kernel with the mh9
> patch.
> 
> Any ideas for another solution than the usleep, or is this the best
> solution?

maybe this is CSR specific, I don't know. Actually I wasn't aware of
that the -b option is really used. However if the 0.5 seconds sleep is
needed then send me a patch for it and I will apply it.

Regards

Marcel




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Re: [Bluez-devel] tcsendbreak and flow control on hciattach (csr chip)

[David Woodhouse]

On Fri, 2004-10-08 at 12:04 +0200, Marcel Holtmann wrote:
> maybe this is CSR specific, I don't know. Actually I wasn't aware of
> that the -b option is really used. However if the 0.5 seconds sleep is
> needed then send me a patch for it and I will apply it.

IIRC the CSR units ship with the 'reset on break' PS key turned off so
it doesn't have any effect anyway. It's very useful if you change the
UART speed on attach though, when you want to get the thing back into a
known state.

-- 
dwmw2