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| philtor | Why to the latest builds of oss-cad-suite not include nextpnr-gowin ? | 01:31 |
|---|---|---|
| philtor | for example, I find one in the 20230210 release build, but not in later ones from 2024 or from today. | 01:33 |
| philtor | s/to/do/ | 01:36 |
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| whitequark[cis] | nextpnr-gowin is deprecated and slated for removal, use nextpnr-himbaechel | 02:04 |
| philtor | Ok, trying that. seems like several options like --family and --cst are deprecated in nextpnr-himbaechel | 02:23 |
| philtor | I have (from the makefile for this example): nextpnr-himbaechel --json counter.json --write counter_pnr.json --freq 27 --device GW1NR-LV9QN88PC6/I5 --cst tangnano9k.cst | 02:23 |
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| famubu[m] | You can use like this instead: nextpnr-himbaechel --device GW1NR-LV9QN88PC6/I5 --vopt family=GW1N-9C --vopt cst=tangnano9k.cst | 02:25 |
| philtor | ack... core dumpts. it seems I should just stick with the older nextpnr-gowin | 02:27 |
| philtor | that's probably why they recommend the 2023 02 10 release build in the Lushay tang nano 9K tutorial | 02:31 |
| philtor | ... back to that one | 02:31 |
| philtor | ah, 2024_2_16 build of nextpnr-himbaechel works with that commandline. The one that core dumps is today's build. | 02:35 |
| philtor | 2025_2_11 | 02:35 |
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| whitequark[cis] | nextpnr-gowin has known routing bugs that completely break designs | 02:53 |
| philtor | I'll file the bug on nextpnr github | 02:57 |
| philtor | I just had the idea that maybe the core dump resulted because I was using the counter.json created from that 2023 version of yosys, but just tried it with today's build's yosys and got the same result (core dump) from nextpnr-himbaechel | 02:59 |
| philtor | Oh, sorry, looks like a dup. Maybe a problem with how they're building it in oss-cad-suite? (based on the comments in #1452) | 03:10 |
| famubu[m] | I had been trying to build nextpnr from source to get the latest nextpnr-himbaechel. But got error saying it can't find a header file x86_64-linux-gnu/python3.9/pyconfig.h though it is present in /usr/include/x86_64-linux-gnu/python3.9/. Any idea how the compiler can be made to use that header file? | 03:30 |
| famubu[m] | I had mentioned it in this issue: https://github.com/YosysHQ/nextpnr/issues/1446 | 03:30 |
| whitequark[cis] | I've never seen this error; it also seems specific to your system | 03:49 |
| whitequark[cis] | you could simply disable Python | 03:49 |
| famubu[m] | How can I disable python? And what features will be unavailable if python is disabled? | 04:06 |
| famubu[m] | I needed apycula for a gowin fpga | 04:07 |
| famubu[m] | <philtor> "ah, 2024_2_16 build of nextpnr-..." <- Can we download already built executables from somewhere? | 04:10 |
| whitequark[cis] | cmake -DBUILD_PYTHON=OFF | 04:11 |
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| famubu[m] | Thanks. I was able to build it with that. | 05:59 |
| famubu[m] | I then tried build/nextpnr-himbaechel --json counter.json --freq 27 --write counter_pnr.json --device GW1NR-LV9QN88PC6/I5 -l pnr.log --report report.json --vopt family=GW1N-9C --vopt cst=tangnano9k.cst --placed-svg placed.svg --routed-svg routed.svg with a simple ring counter file. | 05:59 |
| famubu[m] | But the placed.svg and routed.svg files are blank. Any idea why? | 06:00 |
| famubu[m] | The input files are as mentioned at https://github.com/YosysHQ/nextpnr/issues/1446 | 06:00 |
| famubu[m] | Could it be because the design is too trivial? | 06:00 |
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| lofty[m] | I mean, they're purely aesthetic anyway | 06:02 |
| famubu[m] | I kind of wanted to see what the images generated by nextpnr would look like. | 06:03 |
| famubu[m] | The body of the svg file is this: `<rect x="0" y="0" width="100%" height="100%" stroke="#fff" fill="#fff"/>` | 06:04 |
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| gatecat | this will be because himbaechel-gowin doesn't have any graphical data yet | 08:38 |
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| famubu[m] | <gatecat> "this will be because himbaechel..." <- How can such data be made for use by himbaechel? | 09:24 |
| gatecat | famubu[m]: it's basically a case of implementing these APIs: https://github.com/YosysHQ/nextpnr/blob/6caa6e4e859896c9e0fc1c9f2fa69a1c12cddd8d/himbaechel/himbaechel_api.h#L109-L118 | 09:25 |
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| philtor | famubu[m], you can download pre-built releases of oss-cad-suite here: https://github.com/YosysHQ/oss-cad-suite-build/releases | 16:23 |
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