Rich_Morin
Using a RasPi pico with Nerves
The Raspberry Pi pico seems like a very nifty platform for the sorts of IoT projects I’d like to play with. However, it doesn’t run Linux, so it doesn’t seem like a Nerves port is in the cards.
That said, I wonder if it might be possible to support a lightweight version of Nerves and the Erlang VM on the pico. This might let folks take advantage of the Nerves tool chain and the Actor approach to programming distributed systems. It might even encourage some pico users to look into using Nerves. Comments? (ducks).
-r
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fhunleth
The Nerves core team is focused on microprocessor-based embedded devices, so supporting a Cortex-M0 device is not something that we’d take on. That’s not to say that what you propose wouldn’t be interesting.
The two routes I know that might support the Pico are:
Sebb
The RPi Pico is based on the RP2040-Microcontroller, which is a Cortex-M0+. While its the biggest M0 I know of (lots of RAM, Flash, MHz) its still a very limited design, most notably: it has no FPU.
The most lightweight option AtomVM offers is a STM32F4 which is a Cortex-M4 with FPU.
https://github.com/bettio/AtomVM/blob/master/README.STM32.Md
Maybe they can go smaller? But M0 - doubtful!? If its possible this would be indeed a great opportunity and I’m sure the AtomVM-team will take it.
see here for a comparison (Table “ARM Cortex-M instruction variations”)
You should have a look at https://www.grisp.org/ if you are interested in BEAM on smaller platforms.
EDIT: Just found this: https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/is-cortex-m4-the-strongest
Rich_Morin
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LostKobrakai
Maybe it should be highlighted that even while we talk about nerves as an elixir project a lot of nerves is wrapping an elixir release in a linux system and making that a shippable unit + elixir libraries to help integrate with that linux OS. Remove the linux part and the question becomes what nerves is supposed to bring to the table in the first place. The atom vm would basically be the counterpart to both the linux os and the beam vm on a nerves system.
This is not to say that nerves as a whole might not hold desireable features like tooling over atom vm, but those things are not stuff that could be simply pulled over.