Re: [FFADO-devel] Nosy Traffic Sniffing and Echo Audiofire device

[Clemens L. <cl...@la...>]

Euan de Kock wrote:
> I can now see all the traffic between Windows and the Echo unit.
> 
> The bad news is it is all pretty non-standard stuff - I was hoping for a
> simple fix, but the Echo software appears to communicate using a
> proprietary protocol and different register addressing.
> 
> It sends FCP messages to address "ECC0 0000 0000" (Do you get the humour
> - ECC0 = ECHO) and receives back on "ECC0 8000 0000".

I haven't tried with a new firmware, but the standard FCP addresses
should work, too.

(They use 'meaningful' IDs all over the place.)

> It does open up the internals and you can get lots of good stuff, like
> signal levels on every channel etc, but it would be nice if we could
> just get the sample rate switch to work across all the available
> frequencies

The SET_CLOCK command should work.

The FFADO classes for handling Fireworks commands are in the directory
libffado/src/fireworks/efc; I've extracted the low-level stuff here:
http://git.alsa-project.org/?p=alsa-kprivate.git;a=blob;hb=fireworks;f=sound/firewire/fireworks.h


Regards,
Clemens