clifford changed the topic of #yosys to: Yosys Open SYnthesis Suite: http://www.clifford.at/yosys/ -- Channel Logs: https://irclog.whitequark.org/yosys
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<pepijndevos> How can I specify top-level parameters in Yosys?
<pepijndevos> chparam maybe? trying..
<daveshah> yeah chparam
<daveshah> or hierarchy -chparam
<pepijndevos> cool
<pepijndevos> btw, yosys show always gives me a bunch of Cannot stat file /proc/4046/fd/29: Permission denied, is that something that's wrong on my end, or a bug?
<daveshah> I've seen this recently too
<daveshah> Haven't looked into it in detail
<daveshah> Seems to be coming from fuser
<pepijndevos> Yea, it seems to work regardless, so I've been ignoring it
<daveshah> Running fuser on any file seems to trigger it, so I assume not a Yosys issue (I am on Arch, not sure what you are using)
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<pepijndevos> also arch
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<pepijndevos> Hrm, I'm trying to run synth_gowin without selecting a top module, but failing.
<pepijndevos> synth_gowin -run coarse:
<pepijndevos> that should run coarse and onwards, right?
<pepijndevos> wait, maybe I actually finally got it right
<ZirconiumX> That starts at coarse and then progresses
<ZirconiumX> Which is...not meaningfully different to the default
<pepijndevos> except it skips the hierarchy command which deletes all but one module
<pepijndevos> Is there any reason the following would not work?
<pepijndevos> wire _TECHMAP_REMOVEINIT_Q_ = _TECHMAP_WIREINIT_Q_ === 1'b0;
<pepijndevos> What I want is that if the wiri init is zero, consider it solved, else leave it and generate a warning
<pepijndevos> ouch... I know...
<pepijndevos> it's inserting an IOB into the wire, so now the IOB output has an init set
<pepijndevos> Well, that was not the solution either...
<pepijndevos> ah, found it
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<pepijndevos> Is there something where you can assert that ther *should* be a warning?
<pepijndevos> I want check -assert -noinit but I want to assert that there is in fact an unhandled init
<daveshah> You could use something like `select -assert-count 1 a:init`
<pepijndevos> hmmm okay thanks
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<pepijndevos> daveshah, I remember we discussed some common idioms to initialise a dff, where Gowin used something else than the initial keyword
<pepijndevos> do you remember what it was?
<daveshah> Must have been reg q = 1'b1;
<daveshah> Sometimes I think that's even called FPGA style initialisation for some archaic reason
<pepijndevos> yay works
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<GenTooMan> always use the right tool for the job (face palm) so now I can install nextpnr.
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