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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<corecode> hm why does this very simple counter design simulate, but when i upload it to the fpga, i don't see any motion
<corecode> maybe hfosc stuck?
<tnt> "this" ?
<tnt> a link is missing maybe ?
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<tpb> Title: counter.v · GitHub (at gist.github.com)
<corecode> the fpga clearly gets configured, leds start lighting up
<tnt> Do you see nenable go high then low ?
<corecode> yea, but that might be the pullup
<corecode> external pullup
<tnt> also, as a general recommendation, I'd make the reset be a FF output and not a combinatorial signal.
<corecode> oh yes
<corecode> good point
<tnt> I was mostly concerned with it being stuck high but if you see it go low when running that's fine.
<corecode> somehow all outputs seem to go low
<tpb> Title: counter.v · GitHub (at gist.github.com)
<corecode> oh, maybe programming the fpga fails
<corecode> aha
<corecode> now it works
<corecode> but i had to disconnect the irq pin that was connected to cdone
<corecode> maybe my programmer never sees cdone rise because irq is being pulled down?
<corecode> but the irq pin is declared as inout... shouldn't that remain as 'z' if i don't do anything?
<corecode> ah i guess i need to instantiate an explicit IO cell for the open drain output
<corecode> ERROR: Unknown fixed type wire node value, 'z'
<corecode> says nextpnr
<corecode> "irq": {
<corecode> "direction": "inout",
<corecode> "bits": [ "z" ]
<corecode> },
<corecode>
<corecode> that seems wrong
<tnt> Anything that involves tristate I always instantiate SB_IO
<corecode> i wonder why the inference doesn't work
<corecode> do we have formal documentation of the primitives, or is the vendor documentation the reference?
<tnt> the vendor doc is the reference
<corecode> thanks tnt, that helped me
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<corecode> i guess i need to implement SB_RGB_DRV for the ice40 ultra
<corecode> i think i skipped that the last time
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<rrika> hello, is there a way for the nextpnr gui to load config files produced by ecpunpack?
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<daveshah> No, afraid there isn't
<daveshah> Never got round to doing netlist re for ecp5
<cr1901> ... shit, I just realized this is going to be hell for machxo2 too...
<tnt> cr1901: ?
<cr1901> tiles in machxo2 are very similar in structure to ecp5, but naming of nets and tiles (on the edges and between parts of different sizes) are less well-behaved than ecp5
<rrika> daveshah, thanks for the answer!
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