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| mifune | tnt: i only have two working fomu's left | 05:54 |
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| mifune | i still have several hundered pogo pins though, so i can help you with a programming jig. | 05:54 |
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| xobs | Today's been spent working with the factory trying to qualify a new PCB vendor. That's annoying. But I'm also working on the case, which I'm designing to fit DVT, PVT, and Hacker boards. | 11:16 |
| MadHacker | xobs: PCB vendor any trouble? I imagine for production fomu the pitch is pretty fine, and I guess you're on 0.8mm boards or similar? | 11:26 |
| xobs | MadHacker: 0.6mm. With edge plating, gold fingers, enig everywhere else, and blind/buried vias. It's a fun one. | 11:28 |
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| MadHacker | Ouch, yeah. It's like a whole catalogue of extra-cost items. | 11:28 |
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| AmosSam | xobs: would this work (with some moddification)? I saw in merged pull req some about up5k support | 13:57 |
| AmosSam | https://github.com/cliffordwolf/picorv32 | 13:57 |
| tpb | Title: GitHub - cliffordwolf/picorv32: PicoRV32 - A Size-Optimized RISC-V CPU (at github.com) | 13:57 |
| tnt | Yeah you can run the picorv32 on up5k | 13:58 |
| xobs | AmosSam: That would work, and in fact litex has picorv32 support built in. I just use vexriscv. | 13:58 |
| AmosSam | This one: https://github.com/SpinalHDL/VexRiscv ? | 14:01 |
| tpb | Title: GitHub - SpinalHDL/VexRiscv: A FPGA friendly 32 bit RISC-V CPU implementation (at github.com) | 14:01 |
| xobs | That's the one. | 14:02 |
| AmosSam | I would like to flash riscV core, so I can develop some things... if I build riscV bitstream, I can use it as foboot payload (or how is that called)? | 14:03 |
| xobs | Yes, you can use it as a Foboot image ("payload" works, too). | 14:04 |
| xobs | The trick is that you don't necessarily have a way to communicate with it yet. | 14:04 |
| xobs | Though it should be possible to generate an image with valentyusb and a USB serial driver. | 14:04 |
| AmosSam | Appologies if my questions seems basic, but fomu is my first encounter with fpga, and I'm still learning... | 14:05 |
| tnt | I still need to compare the Vex vs picorv performance-wise. | 14:05 |
| AmosSam | So, it would need vexriscv+valentyusb+usb driver image ? | 14:05 |
| tnt | you could pretty much take the foboot image and just change the sw. | 14:06 |
| xobs | Probably the way to do it is to create a bitstream with vexriscv+valentyusb, then write driver code. | 14:07 |
| tnt | ah wel you might want a couple more EP to do CDC for instance. | 14:07 |
| xobs | I'm suspicious. With the latest vexriscv changes, somehow I can fit all the required endpoints in. | 14:09 |
| AmosSam | Ok, now I have more than enought to read... thx | 14:09 |
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| tnt | xobs: latest changes ? | 14:16 |
| xobs | tnt: the ones I was working on a few weeks ago. Two-stage pipeline and all that. | 14:17 |
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| mithro | mifune / tnt: I'm happy to ship a sheet or two to you in europe? | 17:11 |
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| mifune | mithro: dutch customs isn't too difficult, so i could accept them, send a portion to tnt and send some to people in the dutch hacker scene who are interested in helping | 19:02 |
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| CarlFK | whats a good fomu url? | 21:32 |
| CarlFK | https://github.com/im-tomu/fomu-hardware ? | 21:46 |
| tpb | Title: GitHub - im-tomu/fomu-hardware: Tomu FPGA (Fomu for short), a FPGA which fits inside your USB port! (at github.com) | 21:46 |
| pollo | CarlFK: I don't think there is a "proper" page like the one for the tomu yet | 21:46 |
| pollo | you could also use the crowdfunding page | 21:47 |
| CarlFK | k - it's for a "come to Latch-Up hackfest" announcement - GitHub seems good. it links to crowdsupply | 21:53 |
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