Monday, 2020-09-14

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mithromkurc: You about?14:13
sf-slack<mkurc> @mithro Yep14:14
mithromkurc: Did you want to have a quick sync up on v2x related stuff?14:14
sf-slack<mkurc> @mithro Sure14:15
mithro@mkurc: Shall I do a VC?14:16
sf-slack<mkurc> @mithro: Ok, we can have a VC14:17
mithromkurc: You should have a meeting invite14:21
sf-slack<mkurc> @mithro: Yes, I've got it.14:21
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mithromkurc: https://python-symbiflow-v2x--74.org.readthedocs.build/en/74/examples/clocks/manual_input.html14:54
tpbTitle: Manually set inputs as clock SymbiFlow Verilog to XML (V2X) 0.0-514-ge4b87e3 documentation (at python-symbiflow-v2x--74.org.readthedocs.build)14:54
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mithromkurc: https://github.com/SymbiFlow/XilinxUnisimLibrary15:13
tpbTitle: GitHub - SymbiFlow/XilinxUnisimLibrary: Apache 2.0 licensed copy of the Xilinx Unisim library. (at github.com)15:13
mithromkurc: https://docs.google.com/spreadsheets/d/1G-E2Dq8YG4g9Z6mTygpumwlI_vNlFUQinc9gMgePfec/edit#gid=134909479315:17
tpbTitle: XDC commands supported by SymbiFlow Yosys Plugins - Google Sheets (at docs.google.com)15:17
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mithroacomodi: I still don't understand https://github.com/verilog-to-routing/vtr-verilog-to-routing/pull/1541 ?16:43
tpbTitle: read_place: do not throw error if block name is invalid by acomodi · Pull Request #1541 · verilog-to-routing/vtr-verilog-to-routing · GitHub (at github.com)16:43
mithrohttps://www.irccloud.com/pastebin/g7vo2c63/16:44
tpbTitle: Snippet | IRCCloud (at www.irccloud.com)16:44
mithroopps wrong channel16:44
sf-slack<acomodi> @mithro: some of the tests in symbiflow (carry-stress) are autogenerated (both design, and constraints file) based on tests parameters defined in CMake, and all the tests are generated for each board/device.16:49
sf-slack<acomodi> mithro: After synthesys, some of the tests for ice40 do not have all the IO signals connected, therefore VPR produces a packed netlist without the unconnected IO signals.16:49
mithro@acomodi: Can you be more specific about what is unconnrected?16:49
sf-slack<acomodi> mithro: https://pastebin.pl/view/6a94be8616:52
tpbTitle: Untitled - Pastebin (at pastebin.pl)16:53
sf-slack<acomodi> In the paste there, there is the design, the output eblif and the PCF. The carry_fabric signal is the unconnected signal in this case, which is present in the PCF16:53
sf-slack<acomodi> I believe that another solution would be to add a fix to the IO placement script that generates the placement constraints for VPR, so that it avoids outputting the constraint itself, if the related signal is unconnected. I need to check if this is easily doable16:55
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