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| mithro | xobs: Did the litex spi stuff reduce resource usage at all? | 00:03 |
|---|---|---|
| xobs | mithro: seems to have reduced about 100 LCs. | 00:11 |
| mithro | hrm, that is less than I would have expected | 00:11 |
| xobs | I still need to get writes working, as well as getting quad writes working. | 00:11 |
| mithro | xobs: Are you actually already working on foboot 2.0? | 00:12 |
| xobs | Well, 1.0 will be considered "done" in about an hour when I update the tester. | 00:13 |
| xobs | It's the minimum viable bootloader. Foboot 2.0 should include higher performance quad spi writing, as well as an improved multi-ep USB stack. | 00:14 |
| mithro | What is the 1.0 gateware up to in resource usage? | 00:15 |
| xobs | About 5100 | 00:16 |
| xobs | It goes down to about 5010 with the change in spi flash. | 00:16 |
| xobs | 5057 with SpiFlash(), 5183 with picorvspi. | 00:28 |
| mithro | ice40_up5k_b_evn with lm32.lite seems to be ~SB_LUT4 3114 | 00:38 |
| mithro | I really should switch those builds over to vexriscv... | 00:39 |
| xobs | If I strip out the debug bridge it goes down to ~4100. Having 4x hardware watchpoints + a wishbone master uses up a lot of LCs currently. | 00:40 |
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| TomKeddie | mithro: any suggestions on how to get migen to emit binary? Am seeing "ERROR: expected configuration string starting with '0b' for parameter 'RGB0_CURRENT' on cell 'SB_RGBA_DRV'" because my binary was evaluate to a decimal constant (.RGB0_CURRENT(2'd3). Thanks. | 02:58 |
| TomKeddie | moved discussion to https://github.com/timvideos/litex-buildenv/pull/167 | 03:09 |
| tpb | Title: gateware/ice40: add mux stage and direct register drive to LED block by TomKeddie · Pull Request #167 · timvideos/litex-buildenv · GitHub (at github.com) | 03:09 |
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| mithro | Another sucker! https://twitter.com/femtoduino/status/1148828850530312192?s=20 | 05:55 |
| mithro | xobs - I think we can get the base SoC down to ~3000 | 05:56 |
| mithro | Might see a Wireless Tomu (Womu?) based on an ESP32S by Femto.... | 06:04 |
| xobs | mithro: that would be really nice! | 06:57 |
| xobs | Though what we need more now is a better replacement for epfifo. | 06:57 |
| * xobs uploaded an image: IMG_20190710_143208.jpg (72KB) < https://matrix.org/_matrix/media/v1/download/matrix.org/BaxQLxwsHQbfdbsSTmhpTCPd > | 06:58 | |
| xobs | Also, a sad collection of Fomus that didn't make it through the separation process... | 06:58 |
| xobs | (still trying to figure out why, exactly...) | 06:58 |
| futarisIRCcloud | Holey Fomu Batman! | 07:03 |
| xobs | But 600 pieces seem to have made it so far. So yay! | 07:40 |
| tnt | xobs: failure looks oddly similar. | 07:41 |
| tnt | Almost like the routing bit just went thgouth them | 07:41 |
| xobs | tnt: the explanation I got was that the board was too thin and they went flying. Probably need to create a coverlay for the separation process. They already have a custom routing jig | 07:42 |
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| mithro | xobs: https://renode.readthedocs.io/en/latest/tutorials/fomu-example.html | 17:11 |
| tpb | Title: Renode, Fomu and EtherBone bridge example Renode - documentation (at renode.readthedocs.io) | 17:11 |
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| mithro | I just found http://beta.taricorp.net/tags/raspberry-pi/index.html again... | 17:36 |
| tpb | Title: タリ (at beta.taricorp.net) | 17:36 |
| mithro | http://beta.taricorp.net/2019/fomu-beginners-guide/ | 17:36 |
| tpb | Title: Fomu: a beginners guide · タリ (at beta.taricorp.net) | 17:36 |
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| ghanashyamprabhu | Received a fomu board today! I was thinking of trying creating a USB to SPI, UART, I2C peripheral on the fomu. Any other ideas for getting started with fomu hacking? | 18:41 |
| ghanashyamprabhu | The board I received is a hacker edition and doesn't have a bootloader too so I might actually encounter more hacking fun anyway :) | 18:42 |
| mithro | ghanashyamprabhu: http://beta.taricorp.net/2019/fomu-beginners-guide/ | 18:52 |
| tpb | Title: Fomu: a beginners guide · タリ (at beta.taricorp.net) | 18:52 |
| mithro | ghanashyamprabhu: Some info at https://p.xobs.io/td19/#/ too... | 18:52 |
| tpb | Title: Fomu: An FPGA in your USB Port (at p.xobs.io) | 18:52 |
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| ghanashyamprabhu | great! thanks for the links! | 18:55 |
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| tnt | slides are a bit sparse, I guess without the live explanation :p | 19:03 |
| mithro | tnt: Yeah | 19:03 |
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