Re: [casper] timing errors

Hello Yunpeng, Just to echo what Michael and Vereese said - those tools can help you get a bit more insight into what's going on, and how badly your timing problem is, but the timing report should tell you how by how much you're missing timing (should be some nanosecond value). If it's just a

[casper] timing errors

Dear all,I am using ROACH2 to develop digital receiving backend, but I often encounter timing errors when I run casper_xps toolflow. I wonder if there is any general solution to these timing errors.Thanks a lot,Yunpeng

Re: [casper] timing errors

Hi Yunpeng, You can use Xilinx's PlanAead tool to help with the timing errors. You can place your PFB in a "pblock" which helps with timing. I haven't worked with this in awhile but there's a tutorial on the CASPER wiki here: https://casper.berkeley.edu/wiki/Tutorial_PlanAhead I hope that helps

RE: [casper] timing errors

Hi Yunpeng, all, I recently wrote a memo which describes how you can use Xilinx SmartXplorer to help with timing issues. Have a look on the casper wiki in the Memos section: https://casper.berkeley.edu/wiki/images/f/f8/SmartXplorer_memo.pdf . It isn’t a free pass – you need to get fairly close

Re: Re: [casper] timing errors

Hi James, Michael, and Vereese, Thanks for your reply. I have read the timing report to find the failing paths, and tried to add delay blocks or increasing adder / multiplier latency. It works well but not always, especially for timing errors in some yellow blocks, for instance I will try