6 ms·

Am I missing something or is the final source for the caravel user project missing? I cannot find it here: https://efabless.com/projects/shuttle_name/MPW-1 htt

by kop316 5y ago

Am I missing something or is the final source for the caravel user project missing? I cannot find it here: https://efabless.com/projects/shuttle_name/MPW-1 https://efabless.com/projects/shuttle_name/MPW-1 Nor here (since I think it is by efabless?) https://github.com/orgs/efabless/repositories https://github.com/orgs/efabless/repositories

marcan_42 5y ago
Isn't it this one? https://efabless.com/projects/33 https://efabless.com/projects/33
- kop316 5y ago
  I thought so too, but look at the picture in it versus in the link: https://groupgets-files.s3.amazonaws.com/Efabless/open-source-logo-on-caravel-min.jpg https://groupgets-files.s3.amazonaws.com/Efabless/open-sourc... They are different. Also, if you go to https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.pdf https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.p... Figure 6: You can find the image from the link (top left), and the on ehtat you linked (bottom left), so they are two different projects.
  - marcan_42 5y ago
    I get the feeling the image from the link might just be wrong, though. It has 3 identical blocks in the user logic area. That doesn't fit the 8x8 FPGA story. There's no factor of 3 there. Maybe they just used a random example built on the same platform? Edit: yup, they just picked a pretty picture they had of what was apparently the first design in MPW1. You can browse it here: https://siliconpr0n.org/map/gsky/mpw1-00010001/mz_mit10x/ https://siliconpr0n.org/map/gsky/mpw1-00010001/mz_mit10x/ Almost certainly not the actual FPGA design.
    - kop316 5y ago
      I mean...in my mind, that raises more questions. All of the "Additional Cool stuff" to be implies that it was fabbed out on mpw-1 and they have tested it. Why take a random image then if you have die shots or a picture of the GDS? Then again, the low power consumption picture looks to be measuring the SPI flash? that is far too little pins for the FPGA.
commandpaul 5y ago
The chip ignite path does not require designs to be published, unlike the Google sponsored MPWx tapeouts.
- kop316 5y ago
  I get that, but the link literally says: "The Open Source FPGA ASIC". With that in the title, I would expect to be able to find the source of the FPGA.
- snvzz 5y ago
  Required or not, it is desirable.
  - krasin 5y ago
    My guess would be that the first prototype that they made was too buggy to publish. The promise is that they will share the final design, and I am fine with that. (I am not affiliated with the project, but backed it)
    - krasin 5y ago
      Update: marcan_42 apparently found it: https://efabless.com/projects/33 https://efabless.com/projects/33
      - kop316 5y ago
        I don't think they are the same: Look at the picture in it versus in the link: https://groupgets-files.s3.amazonaws.com/Efabless/open-source-logo-on-caravel-min.jpg https://groupgets-files.s3.amazonaws.com/Efabless/open-sourc... They are different. Also, if you go to https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.pdf https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.p... Figure 6: You can find the image from the link (top left), and the on ehtat you linked (bottom left), so they are two different projects.
    - kop316 5y ago

by kop316 5y ago

marcan_42 5y ago

Isn't it this one? https://efabless.com/projects/33 https://efabless.com/projects/33

kop316 5y ago
I thought so too, but look at the picture in it versus in the link: https://groupgets-files.s3.amazonaws.com/Efabless/open-source-logo-on-caravel-min.jpg https://groupgets-files.s3.amazonaws.com/Efabless/open-sourc... They are different. Also, if you go to https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.pdf https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.p... Figure 6: You can find the image from the link (top left), and the on ehtat you linked (bottom left), so they are two different projects.
- marcan_42 5y ago
  I get the feeling the image from the link might just be wrong, though. It has 3 identical blocks in the user logic area. That doesn't fit the 8x8 FPGA story. There's no factor of 3 there. Maybe they just used a random example built on the same platform? Edit: yup, they just picked a pretty picture they had of what was apparently the first design in MPW1. You can browse it here: https://siliconpr0n.org/map/gsky/mpw1-00010001/mz_mit10x/ https://siliconpr0n.org/map/gsky/mpw1-00010001/mz_mit10x/ Almost certainly not the actual FPGA design.
  - kop316 5y ago
    I mean...in my mind, that raises more questions. All of the "Additional Cool stuff" to be implies that it was fabbed out on mpw-1 and they have tested it. Why take a random image then if you have die shots or a picture of the GDS? Then again, the low power consumption picture looks to be measuring the SPI flash? that is far too little pins for the FPGA.

commandpaul 5y ago

The chip ignite path does not require designs to be published, unlike the Google sponsored MPWx tapeouts.

kop316 5y ago
I get that, but the link literally says: "The Open Source FPGA ASIC". With that in the title, I would expect to be able to find the source of the FPGA.
snvzz 5y ago
Required or not, it is desirable.
- krasin 5y ago
  My guess would be that the first prototype that they made was too buggy to publish. The promise is that they will share the final design, and I am fine with that. (I am not affiliated with the project, but backed it)
  - krasin 5y ago
    Update: marcan_42 apparently found it: https://efabless.com/projects/33 https://efabless.com/projects/33
    - kop316 5y ago
      I don't think they are the same: Look at the picture in it versus in the link: https://groupgets-files.s3.amazonaws.com/Efabless/open-source-logo-on-caravel-min.jpg https://groupgets-files.s3.amazonaws.com/Efabless/open-sourc... They are different. Also, if you go to https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.pdf https://vlsicad.ucsd.edu/Publications/Conferences/383/c383.p... Figure 6: You can find the image from the link (top left), and the on ehtat you linked (bottom left), so they are two different projects.
  - kop316 5y ago