Hi Andrew, I tried this, but this doesn't help. It will show the data on first run, but then all zeros only. Is there something else I could try ? Is this related to fault in design file or python script? Thanks.
-Vikas. On Mon, Sep 26, 2011 at 2:18 AM, Andrew Martens <[email protected]>wrote: > Hi Vikas > > Does the code read back all zeros consistently after FPGA configuration? > Your problem may be related to the thread below; > > http://www.mail-archive.com/[email protected]/msg01938.html > > Regards > Andrew > > > On 24 September 2011 01:48, Vikas Asthana <[email protected]> wrote: > >> Hi Glenn, >> >> The command completes without showing any error and also shows a plot but >> the values are all zeros. Except for the case when it shows up. >> Do you have related problem before? >> In simulation, all seems fine, but to check it again, I am going to >> compile the design with known inputs instead of using x64_adc for the >> inputs. >> Thanks. >> >> -Vikas. >> >> >> On Fri, Sep 23, 2011 at 5:40 PM, G Jones <[email protected]> wrote: >> >>> Hi, >>> What exactly is happening when the command does not work? Is the read >>> not completing or does the data not look correct? What does happen? >>> Glenn >>> >>> >>> On Fri, Sep 23, 2011 at 3:41 PM, Vikas Asthana <[email protected]>wrote: >>> >>>> Hi, >>>> >>>> We have a spectrometer giving out 256 FFT channels. But I am having a >>>> bit problem in reading out the brams using ipython. >>>> I am trying to just read the bram once and see the bram values on a >>>> plot. The command I am using for reading the 32 bit values stored at each >>>> address in BRAM (size = 2048) is : >>>> >>>> f = np.fromstring(u.read(bram,1024*4),dtype='int32').byteswap() >>>> plt.figure(aa);plt.plot(f/(2.0**5)); >>>> >>>> But this will show the data in the BRAM every once in a while (1 in >>>> 10), the same script works fine for the same design giving out 128 FFT >>>> channels. >>>> Has anyone encountered this problem before? I have attached the python >>>> script to look at. >>>> Can anyone tell what could be the problem - is it in the script or in >>>> the design? >>>> Thanks for the help. >>>> >>>> >>>> -- >>>> Vikas Asthana >>>> Research Assistant, >>>> Radio Astronomy Systems Research Group, >>>> Brigham Young University, >>>> 480, Clyde building, >>>> Provo, UT, USA - 84602. >>>> Email: *[email protected]* >>>> >>>> >>>> >>> >> >> >> >> >
