Monday, 2021-11-01

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somlo_florent_: I noticed something weird: with LiteETH commit 2827e99 ("mac/sram: Fix length_lsb slicing (+1)", currently the latest in LiteETH master) litex/rocket can't get a dhcp lease under linux and busybox03:29
somloit's weird because I can netboot, and under linux and busybox I can manually set an IP address and ping (haven't tried anything fancier)03:29
somlobut if I try and get a dhcp lease, it just keeps printing out "sending discover", forever03:30
somlothat is unless I revert 2827e99, which is when udhcpc starts working again03:31
somloSo I'm wondering if the linux driver needs updated to match 2827e99, or if that commit is in itself a regression of some sort03:31
somlosorry I haven't dug any deeper yet, just wanted to start by giving you the vague high-level behavior description first before I go to sleep over here :)03:32
somlooh and sniffing for udp packets on the LAN shared with the litex/rocket board, there are no dhcp requests being broadcast out03:34
somloanyway, that's all I have for now, I can dig deeper tomorrow morning03:35
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_florent_somlo: Hi, thanks for the feedback. I was trying to fix Linux-On-LiteX-VexRiscv CI for the SDS1104XE (using Hybrid Mac) but without access to my hardware. It should be good now with https://github.com/enjoy-digital/liteeth/commit/9b03fc14de8aa2454d967c16bcf7c97cf894b9ee07:32
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tpw_ruleswhat are some other mPCIe FPGA cards that aren't the acorn cle-215 and friends?17:03
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DerekKozel[m]What're you looking for tpw_rules ?17:46
DerekKozel[m]The Numato Aller probably counts as "friends", but is a commercially available component.17:47
DerekKozel[m]The PicoEVB was/is interesting and is a direct relative of the CLE-215.17:48
tpw_rulesi guess i should specify that the reason i am interested in something else is that has nontrivial i/o and is shorter17:48
DerekKozel[m]BitWare has the 250-M2D which has a Kintex FPGA on it in an M.2 formfactor17:48
DerekKozel[m]I don't know of anything that has more GPIO, and most of the height is heatsink that you'd need to deal with one way or another. I have the Aller inside a Thunderbolt enclosure so it's thinness is required, but the enclosure is a big heatsink.17:50
DerekKozel[m]There are non M.2 form-factors that are small and have loads of IO if that's a direction you could go17:50
tpw_rulessorry, shorter as in not 2280 size17:51
DerekKozel[m]Ah, less long17:51
tpw_rulesyes ;P17:51
DerekKozel[m]the Pico EVB is less long, not more IO though17:51
DerekKozel[m]https://concurrenteda.com/index.php/fpga-modules/artix-modules/te0711-datasheet17:51
tpbTitle: TE0711 - Artix-7 High I/O & USB (at concurrenteda.com)17:51
DerekKozel[m]This is less long and has more IO pins, but more $$ and not M.217:52
tpw_rulesi wanted m.2 so i could hook it up to a small pc with a fast interface. maybe a zynq type device would be an alternative, but i think their CPUs are relatively slower compared to even low end x86, right?17:53
tpw_rulesalso for Reasons™ i can't buy anything made in china. made in taiwan is okay though17:53
DerekKozel[m]There's a load of FPGA boards out there, given Reasons I'd guess you can afford more of the options than me17:54
tpw_ruleslike i said i don't know too much about the ARM CPU power17:55
DerekKozel[m]Can you spin a board based off the PicoEVB? It'd be "easy" to route more pins to a high density connector17:55
tpw_rulesthat is an idea17:59
DerekKozel[m]RHS Research published the design files under GPL and they're nice to talk to. I've sent a few emails over the years and they like intelligent questions and comments.18:02
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