[linux-dvb] USB2.0 DVB receiver status update

[Holger Waechtler <holger@convergence.de>]

Hi everybody,

good news: finally the components and PCBs are arrived and we built a 
first prototype of the FX2 based USB2.0 DVB Receiver.

The DC/DC converters are working stable at input voltages between 
~7...~12V. We uploaded and started a simple firmware to the FX2 (which 
just start some disco on the onboard LEDs) without troubles. Johannes' 
firmware source skeleton in CVS is not yet working, after servicing the 
first USB interrupt it hangs. So the board is basically working and now 
we can start to write+debug firmware and kernel driver and watch out for 
remaining hardware bugs.

We had to apply the following patches in order to get it working: on all 
3 LT1940s the VC1 and VC2 error amp outputs pins were accidentally 
connected to the POWERUP signal instead to a compensation R/C network. 
We had to insert this network manually.

The pads for the FX2 are a tick too narrow, for our board the FX2 pins 
have been bended a little to fit better on the PCB pads.

I'll fix these issues in the schematic and PCB files on 
http://linuxtv.org/cgi-bin/cvsweb.cgi/dvb-hw/ as soon I find some time 
to do it...

Next we'll work on the firmware to get the irq problem fixed and write a 
i2c driver in the firmware so that we can talk to EEPROM and tuner.

Holger




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