Hi Guillermo, Just another thought. I am assuming you are using the completed tutorials and not creating these tutorials from scratch. There is a limitation on the BRAMs and hence, snapshots, they can only have a maximum bitwidth of 32 bits at the moment. is it possible that your snap shots is using a larger bitwidth? Maybe just attach your model slx file for the adc_dac_tut and we can confirm.
This limitation is due to the AXI interface that can only support symmetric BRAMs with a maximum bitwidth of 32 bits. We (CASPER) plans to introduce asymmetric BRAM, which would take care of this limitation. There is no specific schedule for this though. Kind regards, Adam Isaacson South African Radio Astronomy Observatory (SARAO) Hardware Manager Cell: (+27) 825639602 Tel: (+27) 215067300 email: [email protected] On Sat, Aug 31, 2019 at 10:56 AM Adam Isaacson <[email protected]> wrote: > Hi Guillermo, > > It seems to be snapshot specific. The intro tutorial doesn't use the snap > shot and that is why it works. This should work. I do recall seeing > something like this before - Wesley New might have encountered this. > > Please can you send me the exact git hash of the mlib_devel and casperfpga > you are using. You could also try use the casperfpga in: > https://github.com/casper-astro/tutorials_devel/tree/workshop2019 as a > sanity check? > > The caper-astro/casperfpga repo has recenty been updated and merged into > master: https://github.com/casper-astro/casperfpga/commits/master. > Therefore, the "tutorials2019" branch has been deleted for casperfpga. > > I would first try the > https://github.com/casper-astro/tutorials_devel/tree/workshop2019 casperfpga > version used in the tutorials_devel repo and then the > https://github.com/casper-astro/casperfpga/commits/master. If the problem > still occurs for both then we can explore the toolflow version. > > I assume you are still running casperfpga using Python 2.7 and the > toolflow in Python 3? I am now using python virtual environments. > > Kind regards, > > Adam Isaacson > South African Radio Astronomy Observatory (SARAO) > Hardware Manager > Cell: (+27) 825639602 > Tel: (+27) 215067300 > email: [email protected] > > > > On Fri, Aug 30, 2019 at 5:50 PM Guillermo Gancio <[email protected]> > wrote: > >> Hi all, >> >> I'm testing the tut_spec with a redpitaya (14bits) using just the >> example from the tutorial "python tut_spec.py -f tut_spec.fpg -r >> rp-xx.local " and I get an error on the line >> >> spec0=fpga.snapshots.accum0_snap_ss.read(arm=False)['data'] >> ... >> (from snap.py).... RuntimeError: accum0_snap_ss.read_uint() - expected >> 16384 bytes, got 32 >> ... >> >> I get the same error on tut_adc_dac, but the tut_intro works ok, >> >> The casperfpga and the tutorials_devel that I'm using are from the >> branch tutorials2019/workshop2019 >> >> Thanks for any advice. >> >> Cheers. >> >> >> >> >> -- >> Instituto Argentino de Radioastronomia >> [Argentine Institute of Radioastronomy] >> >> Guillermo M. Gancio >> Responsable Área Electrónica >> [Head of Electronic Department] >> >> Tel: (0054-0221) 482-4903 Int: 106 >> Mail laboral [email protected] >> >> -- >> You received this message because you are subscribed to the Google Groups >> "[email protected]" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CA%2BEePfQ-O%2B%3DvCcRGi8jD6CYCXGESYEm4ngYYM6Q2H7-pKEDbYQ%40mail.gmail.com >> . >> > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CADTJ%3DnGEQYibsdb1Wc%3D5X4dJz6A%2BfD93-YTip5tUih33nT8fNA%40mail.gmail.com.
