Hi Dave,
thanks for the info. However, I’m not quite sure where it is supposed to be used in the casper_xps toolflow. Are there some instructions available? Hi Wesley, thanks, I looked into the file, it has the option ShiftReg already set to “No”, so it appears as if it is not used as source for default XST parameters (setting it to “Yes” didn’t help) . Cheers Gunter From: Wesley New [mailto:wes...@ska.ac.za] Sent: Freitag, 8. Juli 2016 11:48 To: David MacMahon Cc: Guenter Knittel; casper list Subject: Re: [casper] XST options Hi Gunter, Also take a look at xps_base/XPS_ROACH2_base/system.xmp There is an option for ShiftReg. I have not played with it myself, but it might be what you are looking for. Wesley New South African SKA Project +2721 506 7300 www.ska.ac.za On Thu, Jul 7, 2016 at 5:49 PM, David MacMahon <dav...@astro.berkeley.edu> wrote: Hi, Gunter, I think you are looking for the resynth_netlist function found in mlib_devel as the file resynth_netlist.m. I think the comments make it rather self-explanatory, but please let me know (via the mailing list) if it's not quite what you're after. Cheers, Dave On Jul 7, 2016, at 08:38, Guenter Knittel <gknit...@mpifr-bonn.mpg.de> wrote: Hi, I’m new to this list, and I would be grateful if somebody could give me a hint. I’m trying to speed-optimize a completed and working SL design, and it appears as if an old topic is a main problem. This is the default XST option to merge a chain of FFs into a shift register. What I’m trying to accomplish is to run casper_xps with the right XST options from the start. What I have learned so far is that the XST options are written into the file system_xst.scr, which is re-generated before each run. The file fast_runtime.opt only applies to tools running after XST. Now I’m trying to figure out which tool is actually assembling this scr file, and where it gets the options from. In the hope that I can change the default behavior. Can somebody give me a pointer? Or is my approach fundamentally wrong? Thanks a lot Gunter from MPIfR Bonn
