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| develonepi3 | mmicko: Good morning. I created a docker image with the following software (verilated, autofpga, zipcpu, icestorm, nextpnr, and yosys). see "https://github.com/develone/docker-examples/blob/master/zipcpu/doc/zipcpu0.62tests.pdf" & "https://github.com/develone/docker-examples/blob/master/zipcpu/src/Dockerfile". This image should work with "https://github.com/ZipCPU/icozip" since, the catboard uses the same ice40 HX8k like the icoboard. | 16:15 |
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| ZipCPU | Any ideas where to look for an, "ERROR: failed to place cell '$gbuf_thedesign.genbus.w_reset_$glb_sr' of type 'SB_GB'"? | 20:16 |
| ZipCPU | My design has only one SB_GB within it--used for the clock used throughout the design, although NextPNR looks like it's adding several more | 20:16 |
| daveshah | It is most likely that nextpnr is promoting too many reset globals for some reason | 20:20 |
| daveshah | Any PLLs involved? it might be related to the somewhat complex constraints that these add, too | 20:20 |
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| ZipCPU | No. No PLLs involved at all | 20:52 |
| ZipCPU | I would imagine that's part of the problem ... this is the ICO board, if you remember, that I'm working with and if I use the PLL (or so I was told) I can't use the SRAM | 20:53 |
| ZipCPU | Hmm ... after a bunch of design edits, the error vanished ... not sure what to make of that. It's still promoting a lot of SB_GB's, compared to the one manual one in my design, but it now seems to be passing initial placement | 20:56 |
| ZipCPU | Now it can't place all of my cells ... (ripup iteration limit exceeded) ... | 20:56 |
| daveshah | The workaround is probably `--no-promote-globals` if you have a manual GB on the clock anyway | 20:58 |
| ZipCPU | Let me try that ... see what happens | 20:58 |
| daveshah | The second issue is either another manifestation of the first; or unrelated if your logic utilisation is high | 20:58 |
| ZipCPU | 6122 ICESTORM_LC's out of 7680 | 20:59 |
| daveshah | That shouldn't be high enough to be a problem | 21:00 |
| ZipCPU | I wouldn't think so ... especially since I'm only using 1 clock. There shouldn't be a lot of placement constraints | 21:00 |
| ZipCPU | No ... still getting the ripup iteration limit exceeded | 21:01 |
| daveshah | Nope, sounds like the ripup iteration limit issue is also GB related | 21:01 |
| ZipCPU | It is? | 21:01 |
| daveshah | Hmm, can you put the json and the pcf somewhere? | 21:01 |
| ZipCPU | Where would you like them? | 21:01 |
| ZipCPU | I can stuff them on the blog if you'd like ... | 21:02 |
| daveshah | GitHub gist or similar? | 21:02 |
| ZipCPU | zipcpu.com/tmp/icozip.json and zipcpu.com/tmp/icozip.pcf | 21:03 |
| ZipCPU | I can push the whole project too, if you'd like | 21:03 |
| daveshah | ZipCPU: what git commit is your nextpnr? | 21:06 |
| ZipCPU | Let me check .. it's been a while | 21:07 |
| ZipCPU | Looks like: c3d4117a219570f0a132ae4f810dec961811311a dated Nov 18 | 21:07 |
| ZipCPU | Let me update ... it'd help us be on the same page | 21:07 |
| daveshah | On Dec 30 I increased the ripup iteration limit as a few designs where hitting it | 21:08 |
| daveshah | I think that might be what is happening here | 21:08 |
| ZipCPU | Ok. Rebuilding NextPNR now. We'll see if that helps | 21:08 |
| ZipCPU | Alright! It passes. Thanks! | 21:25 |
| daveshah | Great! | 21:25 |
| GenTooMan | good to know... now that I think about it "update next pnr regularly" | 21:33 |
| ZipCPU | ;) | 21:33 |
| ZipCPU | Yeah, I of all folks should know better than to ask for help w/o first updating my tools. | 21:33 |
| GenTooMan | zipcpu I was thinking about some of the "stupid" problems I had months ago... and I realized it was the version of nextpnr sadly. | 21:34 |
| GenTooMan | debian isn't old school it's old tools they haven't updated nextpnr even on the buster.backports I think. That was 2018_11 in 2019_07 when buster was released. | 21:36 |
| GenTooMan | actually buster didn't HAVE nextpnr it hat arachne only now that I remember. | 21:37 |
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| N2TOH | I thought about maybe going out for seomthing to eat, but it's 28 degrees so FFFFFFFFF that! | 22:04 |
| daveshah | The perfect temperature to sit outside and enjoy a nice meal :) | 22:05 |
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| GenTooMan | yes 28C is comfy.. of course it's -9.4C here | 22:41 |
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