G'day, I'm glad to inform that replacing the FX2 chip resolved the problem and the USRP appears to be fully operational, e.g. usrp_benchmark and usrp_wfm work out of the box.
I since tried to connect the board using a USB2.0 cable of 5m in length and can't establish communication with it. The cable length is within the USB2.0 specifications. It may just be a poor quality or bad cable, but would like to hear if anyone else has been successful in using a long USB cable. Using an oscilloscope, I can see a pulse train of about 0.5Vpp with channel A (D+) and channel B (D-) at the USRP connector. Does this sound right? cheerio Berndt On Thursday 13 November 2008 08:49:40 Berndt Josef Wulf wrote: > G'day, > > I haven't made any progress in finding a solution to my problem. A direct > email to Matt (Ettus) explaining my predicament didn't receive a reply. It > was hoped that the manufacturer of the USRP would provide some after sale > techmical support for their products. > > The USRP is no longer communicating when it was powered up after being in > storage for the past 6 month. As mentioned in my previous email, see below, > my suspect is the co-processor that hosts the USB interface, although I > can't be sure. Perhaps someone on this list knows a procedure that would > lead to an accurate diagnosis. > > At this stage I'm contemplating to replace the processor. What needs to be > considered prior to replacing this processor, e.g. does it need to be > flashed? I'm also looking for a supplier for this chip. > > Any help is very much appreciated. > > 73, Berndt > VK5ABN > > On Tuesday 04 November 2008 22:28:38 Berndt Josef Wulf wrote: > > G'day, > > > > today I discovered that my USRP appears to have a problem. The USRP > > device is nolonger detected when connected to a PC (i386) running WinXP, > > Linux or NetBSD. I tried different systems and cables to no avail. This > > is with GNU-Radio current, but also tried with the last stable release. > > > > Power supply rail measures 3.3V after the regulator and the LED is fast > > flashing, which normally would indicate that the processor is running, > > but firmware hasn't been loaded. Signal lines from processor pins to > > connector/cable have continuity. I'm now suspecting the USB interface on > > the microprocessor chip. > > > > Has anyone had similar experience and what was the solution to your > > problem? If so, what was your solution? > > > > I really would hate the idea of having to replace the microprocessor > > because of lack of spares and in particular its package size. > > > > Any help is very much appreciated. > > > > 73, Berndt > > VK5ABN > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
