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• Chat Transcript, Page 1

  Tom Nardi • 7 days ago • 0 comments

  Dan Maloney  2:51 PM Howdy all, welcome to the Hack Chat!

  Nicolas Tremblay  2:52 PM Hay Dan! long time no read

  Dan Maloney  2:53 PM Indeed, glad to see the old gang again

  Boian Mitov  2:58 PM Hello everyone! :-)

  dracolytch  2:58 PM Good afternoon from DC

  dracolytch  2:59 PM Raspberry Pi hack chat soon, yes?

  Richard Hogben  2:59 PM yep

  Boian Mitov  2:59 PM Hope so :-)

  Dan Maloney  3:00 PM Yep, starting up in a minute. I don't see Eben logged in yet, might have to wait a few

  mwsecdev  3:00 PM Hello all!

  Dan Maloney  3:01 PM But, let's kick it off while we wait. Welcome to the Hack Chat, I'm Dan and I'll be modding today along with Dusan as we welcome Eben Upton to kick off our 2025 series!

  Chuck.untulis  3:03 PM Can't hear anything?

  Dan Maloney  3:04 PM @Chuck.untulis - it's an all-text chat, no audio. Just waiting for Eben to get online

  Chuck.untulis  3:05 PM Thanks.

  Dan Maloney  3:05 PM Just got word from Eben, he's trying to authenticate. Just a minute now

  Dan Maloney  3:06 PM Stupid computers ;-)

  deʃhipu  3:07 PM Wait, you mean this is running on a computer? I thought it was just a big anthill in Pasadena.

  fieraangeles  3:07 PM Hi 👋

  fieraangeles  3:07 PM What's You name

  Dan Maloney  3:08 PM @fieraangeles - Hi, this is Dan and we're doing a Hack Chat today with Eben Upton

  Dan Maloney  3:09 PM Just waiting for him to log in -- he said he was in email authentication jail

  eben.upton  3:11 PM Yay

  Fred  3:11 PM Hello Eben!!!

  curiousmarc  3:11 PM Howdy

  eben.upton  3:11 PM Hello

  eben.upton  3:11 PM Sorry about that. Chrome was sad about the email verif link. Safari was happy.

  Dan Maloney  3:11 PM Ah, there we go!

  Dan Maloney  3:12 PM Welcome aboard, thanks so much for joining us today!

  eben.upton  3:12 PM Thank you for having me.

  Tony White  3:12 PM woo hoo! Thanks for taking the time!

  eben.upton  3:12 PM It's been a busy couple of days for us.

  Dan Maloney  3:13 PM Normally this is where I say "Tell us a little about yourself", but that seems weird so...

  eben.upton  3:13 PM "My name is Eben and I used to be an engineer"?

  deʃhipu  3:14 PM and then an arrow to the knee?

  Szaja  3:14 PM Once engineer, always engineer.

  Tony White  3:14 PM I'll kick things off - Do you see standard Raspberry PI models ever gaining the RP2040 microcontroller to manage power, similar to power management hats the community has developed (like this one https://spellfoundry.com/product/sleepy-pi-2/)? Being able to fully shut off and on the powerful SBC from simple low power microcontroller would be an amazing feature, and enable a lot of applications!

  eben.upton  3:14 PM The mindset certainly stays with you, even when you mostly interact with the world via email rather than a text editor and C compiler.

  eben.upton  3:15 PM That's a good question.

  Boian Mitov  3:15 PM Hello @eden.upton :-)

  Boian Mitov  3:15 PM Hello @eben.upton

  curiousmarc  3:15 PM You have been kicked in the office upstairs. That's not always a bad thing.

  eben.upton  3:15 PM Lots of interesting consequences of the odd order in which we did our ASIC work. (Hi Boian)

  eben.upton  3:16 PM So RP1 (the IO chip on Pi 5) predates RP2 (RP2040) architecturally.

  Rogan Dawes  3:16 PM Alternatively, an ultra low power core that can run while the main cores are in deep sleep.

  eben.upton  3:16 PM And it's only really with RP2 that we got...

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• Chat Transcript, Page 2

  Tom Nardi • 7 days ago • 0 comments

  benbojangles  3:48 PM vr/mixed reality sbc?

  benbojangles  3:49 PM allow users to work on an android/linux vr port

  eben.upton  3:49 PM benbojangles - historically would have been a bit "picking winners" (our word for doing engineering with is very focused on a specific vertical market)

  eben.upton  3:50 PM but we do do things now (Pi 500, monitor) which are both more "complete" as products, and more focused on a specific use case or user story than we did in the past

  eben.upton  3:50 PM so never say never

  benbojangles  3:51 PM any word on pi sbc that will incorporate nvivdia cuda gpu?

  eben.upton  3:51 PM I hear Jeff may have made some progress with non-AMD GPUs recently

  Evan  3:52 PM More like a GPU that incorporates a Pi, lol

  eben.upton  3:52 PM :)

  benbojangles  3:52 PM i agree it would be better to have a more open gpu provider than nvidia

  benbojangles  3:52 PM especially for linux

  eben.upton  3:53 PM just amazing what they've accomplished with the CUDA ecosystem though

  Jan Hamal Dvořák  3:53 PM @eben.upton: And (probably) last question from me. Any chance of expanding DSP functionality on RP2s? I am thinking of e.g. couple FIFOs for DMA to sync on, possibly usable as Ts and Wyes to (de)interleave streams, at least two adders that can be fed and sampled by DMA, maybe full-blown CIC if you can fit the adders.

  eben.upton  3:53 PM how we used to laugh at the NVIDIA guys at Khronos when they said in the future most compute would happen on GPUs

  Fred  3:53 PM nvidia ai hat for RPI....

  benbojangles  3:53 PM haha

  Fred  3:54 PM do some coda rpi style

  Fred  3:54 PM *cuda

  eben.upton  3:54 PM Jan - if there's a sketch of something (with some use cases) we could think about it. We've sort of shied away from adding compute to the PIO/DMAverse, but it's not impossible.

  dratini0  3:55 PM There are also ways to run/port/etc CUDA code to non-Nvidia GPUs, but I have forgotten all the details.

  eben.upton  3:56 PM The challenge is that a lot of the AI models are somewhat co-evolved with the NVIDIA microarchitecture. That's a very deep moat.

  benbojangles  3:56 PM wifi 7 coming to pi? It would make excellent bandwidth streaming

  eben.upton  3:57 PM WiFi 5 has been good to us across Pi 3+, 4, and 5, but I suspect we've probably shipped out last flagship product with that tech.

  Fred  3:58 PM any hints on "most requested RPI features" Eben?

  benbojangles  3:58 PM yes, there are big changes happening in wifi tech now

  eben.upton  3:58 PM Well, a power button and an RTC :)

  Fred  3:59 PM :)

  Fred  3:59 PM PI5 power - check

  Evan  3:59 PM I'm still voting for the ability to sleep

  keithpenney  3:59 PM Yes, with wake-on-LAN

  eben.upton  3:59 PM I'm not sure there's much else. Suspend/resume, which is getting some attention (but is incredibly hard to make robust to our standards, as other people have found).

  benbojangles  4:00 PM it's less than 1w power, why need to sleep so much?

  dratini0  4:00 PM IIRC the wifi chip is attached via SDIO. What are the limitations of that, and would you need to upgrade that if you went for wifi 6 or newer?

  eben.upton  4:00 PM Ah, our posts crossed.

  Fred  4:00 PM really cool with the extra risc core Pico 2

  eben.upton  4:00 PM Actually SDIO is very bandwidthful in its highest speed incarnations.

  dratini0  4:00 PM Neat

  eben.upton  4:01 PM But I suspect (and this is a long way away) you'd want to provision the Pi 6 SoC with a PCIe lane for WiFi. Actually the most attractive...

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