Hi, Thank you for your attention.
We know that we are working with old versions and this is a problem. We've had some previous modifications, and it seemed easier to keep working with them instead of porting everything to the latest firmware/drivers. Anyway, we will take a closer look into what is happening on the host. Thanks, Tiago Em 15 de junho de 2011 14:05, Matt Ettus <m...@ettus.com> escreveu: > > Tiago, > > It is very hard to help you. You are basically saying "we did something > different and it doesn't work." You haven't posted code, you're using > an old version of GNU Radio, and not using the latest drivers (UHD). > This all makes it hard to help you. > > If the FPGA is asserting have_pkt_rdy, the FX2 is not setting RD and OE, > and you haven't changed the code running in theFX2, then it is likely > that your app on the host has died or closed. > > Matt > > > > On 06/14/2011 11:52 AM, Tiago Rogério Mück wrote: > > Hi, > > > > Have anyone taken a look at this ? > > > > We are still struggling to find a solution to this problem. Any tip > > would help a lot. > > > > Thanks, > > Tiago > > > > > > Em 27 de maio de 2011 16:51, Tiago Rogério Mück <ti...@lisha.ufsc.br > > <mailto:ti...@lisha.ufsc.br>> escreveu: > > > > Hi, > > > > We have been working with an (old) USRP1 and doing some > > modifications in the FPGA code. After our modifications (we added an > > extra layer of DDCs to perform channel separation in the FPGA), the > > things didn't work as expected. > > > > In some Gnuradio applications the USRP stops sending samples after > > some time. For example, usrp_fft.py runs just fine all the time, but > > usrp_rx_cfile.py and usrp_wfm_rcv.py work for some secs and then the > > USRP stops sending samples. > > > > I added some pics of our preliminary debugging. In the figures, the > > yellow, blue and red signals refer to the have_pkt_rdy, RD and OE > > signals, respectively. After some time, the Cypress stops setting RD > > and OE signals in response to the assertion of have_pkt_rdy (first > > figure). Latter, the USB FIFO in the FPGA overflows and then > > have_pkt_rdy goes down (figure 2). So it seems the problem is not > > with our modifications in the FPGA code but with something related > > to the Cypress. > > > > Have someone ever had a similar problem ? Any clue in how to solve > > this would help a lot. We are using Gnuradio 3.2.2. > > > > The funny thing is that usrp_fft.py works perfectly (we double > > checked all *.py to make sure our new bitstream is always being > > loadded and our new DDCs are being properly configured). > > > > Thanks. > > > > Regards, > > Tiago. > > > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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