Saturday, 2021-12-04

*** tpb <[email protected]> has joined #symbiflow00:00
tpb<t​ristanC> Hello again, so I'm getting `Warning: Couldn't find port matching sw[0]` and `ERROR: set_property IOSTANDARD: Incorrect number of arguments.` when running symbiflow_synth with the xdc file provided by digilent for the nexys a7 board.01:19
tpb<t​ristanC> and it seems like this is a known issue according to https://github.com/gergoerdi/clash-pong/commit/237d811f98de6ce1e480788af4f3b768dc8c3f27 , but i'm not sure what to do for the SW pin...01:21
tpb<t​ristanC> well, removing most of the set_property fixed the error and a bit file got generated, but that does not seems right :)01:22
tpb<s​f-slack> <gergo> Yeah it seems that Vivado is happy with the .xdc file containing unconnected ports, but Symbiflow isn't. So you unfortunately have to make a design-specific version of your .xdc file that removes or comments out all unconnected ports.  This sucks because it means you can't share a single canonical .xdc across projects :(10:33
tpb<s​f-slack> <gergo> Xilinx ISE has the same problem btw. Maybe I should add some build-time rules to generate the `.xdc`/`.ucf` files by starting from a template and stripping out unused ports10:38
tpb<s​f-slack> <gergo> I assume due to the nature of this project, people here have some grasp of FPGA-related IP questions? Can someone maybe help me out with https://opensource.stackexchange.com/q/12176/4120?10:41
tpb<t​pb> Title: licensing - Including design reference implementations with open source program - Open Source Stack Exchange (at opensource.stackexchange.com)10:41
tpb<t​ristanC> @gergo hello, I see thanks!13:18
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