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| sf-slack1 | <pepermont> @acomodi I have experimented with FASM2BELs a bit and I made the following observations: About --bit_file, when I use it without giving a FASM file I get an error that the fasm file is necessary. If I give both a bitstream and a FASM I get errors again `CalledProcessError(retcode, process.args, subprocess.CalledProcessError: Command 'None --part_file..` | 08:28 |
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| sf-slack1 | <pepermont> If I just give a FASM it works | 08:28 |
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| sf-slack1 | <acomodi> Hmm, possibly you might need to give as input also `--bitread <path-to-bitread>` in case you want to only use the bit_file | 08:47 |
| sf-slack1 | <acomodi> bitread is a tool that you can build from https://github.com/SymbiFlow/prjxray | 08:47 |
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| sf-slack1 | <pepermont> @acomodi it is the one that outputs the .frames file, right ? If thats the case I still get the same errors | 09:12 |
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| sf-slack1 | <pepermont> But again that is not really a problem since I can work around it with just giving the FASM file :) | 09:32 |
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| sf-slack1 | <acomodi> I guess that the required check should be removed from https://github.com/SymbiFlow/symbiflow-xc-fasm2bels/blob/70fb131f8b6a723f3e6c3d729b5147c3782c69a5/fasm2bels/fasm2bels.py#L341 and a following check added to see whether at least one of bit_file or fasm_file is given as input. regarding the error with bitread, can you paste the whole failing log please? | 09:35 |
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| sf-slack1 | <pepermont> By doing that I still get the type of error I would get if I used both a FASM and bitstream files | 09:41 |
| sf-slack1 | <pepermont> @acomodi Another thing I noticed is that if you dont give `--iostandard` and `--drive` you get a warning like `IOSTANDARD+DRIVE+SLEW settings provided for IOB_X0Y3 do not match their counterparts decoded from the fasm Requested: IOSTANDARD=None, DRIVE=None` so I assume that this information is missing from the FASM file. I also tried running the fasm2frames.py and there I got the following error `raise | 11:22 |
| sf-slack1 | FasmLookupError('\n'.join(missing_features))` `prjxray.fasm_assembler.FasmLookupError: Segment DB LIOB33, key LIOB33.IOB_Y1.LVCMOS12_LVCMOS15_LVCMOS18_LVCMOS25_LVCMOS33_LVTTL_SSTL135.SLEW.SLOW not found from line 'LIOB33_X0Y3.IOB_Y1.LVCMOS12_LVCMOS15_LVCMOS18_LVCMOS25_LVCMOS33_LVTTL_SSTL135.SLEW.SLOW'` Then I took a look at the code and noticed the following comment `# TODO: The following FASM string only works on Artix 50T and | 11:22 |
| sf-slack1 | Zynq 10` `# fabrics. It is known to be wrong for the K70T fabric, but it is` `# unclear how to know which IOSTANDARD to use.` So I assume that I get it because I use an xc7a35t instead. I remember though that in older versions of the tool such a problem did not exist. Was that version assuming a standard and putting it there? (e.g. LVCMOS33) If that assumption is correct is there a way to enforce it in the current script as | 11:22 |
| sf-slack1 | well? | 11:22 |
| sf-slack1 | <acomodi> The fasm lookup error might be due to an outdated prjxray-db | 11:31 |
| sf-slack1 | <acomodi> https://github.com/SymbiFlow/prjxray-db/blob/cd41f08a8a4d2a60053750a0fe10623b1e2e35da/artix7/segbits_liob33.db#L63 this should be the correct entry | 11:32 |
| sf-slack1 | <pepermont> The file looks the same as the one I have | 11:53 |
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