[linux-dvb] Re: USB 2.0 to DVB-ASI

[Holger Waechtler <holger@convergence.de>]

Hi Brian,

Brian Korsedal wrote:
> Hi,
>
> As I understand it, there is an open source project to make a USB 2.0 
> DVB reciever.  We have a need for a USB 2.0 to ASI converter (at 5-16 
> Mbps).  I would like to build on the open source project.  We have an 
> ASI output circuit which accepts a 8-bit wide data, sync and clock and 
> outputs DVB-ASI.  The clock is at 27 Mhz.  We also have clock circuits.  
> I have to talk this over with my boss, but I think we would be willing 
> to donate it to this project (I'm crossing my fingers).  In return we 
> hope to get a USB 2.0 to DVB-ASI that is cheap to make and well 
> supported by Linux.  I think it could be a good situation for our 
> company because we do not want to develop the USB 2.0 circuits and 
> drivers. 
> I'd like to get in touch with whoever is on this project.  I don't know 
> what the time frame on this is and it is still tenitave.  Don't expect 
> anything for at least several weeks.
Basically you can use e.g. the Braintechnology board for 87EUR: 
http://www.braintechnology.de/braintechnology/usb_fastinterface25.html. 
It's pretty cheap and you can immediatly start coding.

In the LinuxDVB CVS repository (web interface on 
http://linuxtv.org/cgi-bin/cvsweb.cgi/dvb-hw/dvbusb-fx2/) you find the 
library and board files for our board, if you take this as starting 
point your board design should be pretty straightforward. Note that you 
have to check out binary files using the cvs commandline utility...

Starting from our firmware you can probably take over the entire 
initialisation and EP0 code and only have to implement the actual 
communication over isochronous endpoints...

Holger



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