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| EmilKarlson | the crowd supply happened, but the order functionality on the page is not closed, does this mean it's still actually open for orders? | 06:53 |
|---|---|---|
| xobs | Emil Karlson: it is! With Crowd Supply, the "Back It" button turns into a "Preorder" button after the campaign. | 06:54 |
| EmilKarlson | thanks | 06:54 |
| EmilKarlson | would usb-c connector on tomu be simple? | 07:11 |
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| xobs | There are ideas of how a USB-C connector might work, but no concrete plans. The form factor is the big unknown. | 07:17 |
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| tnt | https://i.imgur.com/rev20YL.png | 09:06 |
| tnt | This took way longer than I care to admit :p | 09:06 |
| xobs | tnt: fancy! FreeCAD 3D drawing of the RGB LED? | 09:08 |
| tnt | Yeah | 09:09 |
| TomKeddie | xobs I'm digging into the flash interface a little, I wanted to check the sizes, the schematic says 128Mbit for EVT and DVT but the python code says 16Mbit (2Mbyte) thanks. | 09:16 |
| xobs | TomKeddie: PVT/DVT have 16 Mbit, as does Hacker | 09:17 |
| TomKeddie | Thanks. | 09:19 |
| TomKeddie | If you have a moment, I had another one about FBM_OFFSET, perhaps you can clarify for me why FBM_OFFSET uses 0x1a000 but this doesn't correspond to any of the multiboot locations? I realise they are somewhat unrelated but I would have expected them to be aligned just for simplicity? | 09:20 |
| xobs | The idea is that FBM_OFFSET is where the FoBootMain program lives. It uses the same CPU as FoBootRecovery. That is, the ICE40 doesn't do a SB_WARMBOOT at all. | 09:22 |
| TomKeddie | Ok, thanks that makes sense, they're unrelated. On Arty I'll try to make sensible equivalent locations, just need to think it through. The fpga image is size is obviously a lot bigger but so is the flash. | 09:25 |
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| xobs | TomKeddie: this might be useful to copy into the repo somewhere: https://docs.google.com/spreadsheets/d/1RumoVlaTyYCGBCcCKFjigD4A6gUNujb8Fpnj_O5XAS8/edit?usp=sharing | 10:10 |
| tpb | Title: Fomu / ice40UP5K Partition Scheme - Google Sheets (at docs.google.com) | 10:10 |
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| TomKeddie | xobs: that's awesome data - I sent you a PR with a new .md file, I'll try to translate the spreadsheet into the .md tomorrow. | 10:15 |
| TomKeddie | I also sent a PR fixing direct address mapping (well I think it does, I still don't have direct access working on Arty but I'm on it) | 10:15 |
| xobs | TomKeddie: Thanks! I'll take a look at that PR, too. | 10:16 |
| xobs | It would be good to get some of the more advanced tools to look at valentyusb. | 10:16 |
| xobs | I just discovered that v1.8.1 works just fine on my laptop, and indeed on lots of other devices, but fails on about 5% of packets on my desktop. | 10:17 |
| xobs | Re-running with a different seed solves it, but that's still worrisome. | 10:17 |
| TomKeddie | I have PCBs for openviszla but they'll just be pcbs for some time I suspect. | 10:20 |
| TomKeddie | I've also done a pmod for the openvizla front end (usb phy) that could be useful, again just pcbs at this point. openvisla is written in migen though.... | 10:21 |
| TomKeddie | https://github.com/TomKeddie/prj-pmod/tree/master/hardware/pmod-usb-analyser-openvizla | 10:22 |
| tpb | Title: prj-pmod/hardware/pmod-usb-analyser-openvizla at master · TomKeddie/prj-pmod · GitHub (at github.com) | 10:22 |
| TomKeddie | seed change implies unconstrained timing requirements I guess? | 10:23 |
| xobs | Usually. Either that or the timing input into nextpnr isn't accurate. | 10:25 |
| TomKeddie | Perhaps synth the hdl with the lattice tools (or is that a sin?) | 10:25 |
| xobs | No, that's a really good idea. It's always good to have more views into a problem. | 10:26 |
| TomKeddie | There is also the aliexpress usb 2.0 tools mentioned in the teardown talk 4h40m into https://www.youtube.com/watch?v=0mTw9iHcj3Q&t=1173s | 10:32 |
| xobs | TomKeddie: It doesn't fit with the Lattice tools. | 10:42 |
| TomKeddie | Argh | 10:48 |
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| TomKeddie | Is is close, perhaps you can drop the non essential stuff like the leds/touch etc? drop the rom/ram size? | 10:50 |
| TomKeddie | One thing that occurred to me is that the laptop is likely to have a higher quality signal path (all pcb) to the usb controller, on the desktop you have connectors and cable transitions. Perhaps its worth using a passive cable with the laptop to see if that also produces errors? | 10:52 |
| TomKeddie | (I need to crash, will let you know if I have more thoughts) | 10:53 |
| xobs | TomKeddie: Goodnight! | 11:12 |
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| mithro | TomKeddie: If you think having a constructed OpenVizla would mean more hacking on ValentyUSB, then I'll send you one (and you can send me back it if you even construct your own) | 19:50 |
| tnt | Also ... https://github.com/smunaut/iua if you have a usb-> serial adapter and any ice40 you could use that. | 19:52 |
| tpb | Title: GitHub - smunaut/iua: ice40 USB Analyzer (at github.com) | 19:52 |
| tnt | It's FS and not HS but that's enough for ValentyUSB. | 19:52 |
| mithro | xobs: "nmigen.build.res.ResourceError: Resource component uart_0__tx uses physical pin C11, but it is already used by resource component uart_0__rx that was requested earlier" | 20:23 |
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