#symbiflow on 2020-05-24 — irc logs at freenode.irclog.whitequark.org

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10:39 <ricos> daveshah I'm trying to run a blinky led on a zynq xc7z020clg484-1 but it crashes with: https://pastebin.com/C0pqLRvK . Running the same code with an artix works fine.

10:39 <tpb> Title: Info: Preparing clocking... terminate called after throwing an instance of 'std - Pastebin.com (at pastebin.com)

10:40 <daveshah> ricos: what is the backtrack?

10:41 <daveshah> *backtrace

10:43 <ricos> daveshah, https://pastebin.com/i8nKbmYS

10:43 <tpb> Title: #0 0x00007ffff6042ce5 in raise () from /usr/lib/libc.so.6 #1 0x00007ffff602c8 - Pastebin.com (at pastebin.com)

10:45 <daveshah> ricos: hmm, no idea, if you provide a test case I'll have a look at some point but it might be a few days

10:47 <daveshah> just to check, is the device database as recent as the nextpnr binary?

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10:49 <ricos> daveshah, it should be ...

10:50 <daveshah> that should all be fine then

10:50 <ricos> nextpnr-xilinx -- Next Generation Place and Route (Version a9df1d5e)

10:52 <ricos> where could I check the device database?

10:52 <daveshah> if you built it at the same time as building nextpnr then that will be fine

10:52 <ricos> yes

10:57 <daveshah> then please provide a JSON & xdc and I'll look further

11:03 <ricos> daveshah, https://tmpfiles.org/download/51038/archiv.tar

11:03 <tpb> Title: /tmp/files - Temporary File Hosting (at tmpfiles.org)

11:03 <daveshah> thanks

11:06 <ricos> daveshah, in your example (artyz7 https://github.com/daveshah1/nextpnr-xilinx/blob/xilinx-upstream/xilinx/examples/artyz7-20/blinky.sh) you use a xc7z020clg400 . Is there an easy way to get the database for this chip?

11:06 <tpb> Title: nextpnr-xilinx/blinky.sh at xilinx-upstream · daveshah1/nextpnr-xilinx · GitHub (at github.com)

11:06 <daveshah> ricos: I created it manually a while ago

11:07 <daveshah> but that was a hack and I can't remember the exact steps

11:07 <daveshah> one of the xray people (litghost?) will be online later and can help

11:08 <ricos> ok... thanks for your help

11:12 <daveshah> ricos: the problem is that T2 is one of the Zynq special purpose ways

11:12 <daveshah> *special purpose IO

11:12 <daveshah> it's failing in a horrible way and I'll add it to my todo list to fix (this kind of issue is why nextpnr-xilinx isn't close to end-user ready yet unfortunately)

11:13 <daveshah> but you would need to use a pin that is connected to the FPGA fabric (ideally a clock input) for the clock

11:22 <ricos> daveshah, thanks, using another pin works as expected

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