Rust ESP32 Community Meeting 2023-04-13

[JurajSadel]

Please add topics and links to this discussion.

The meeting is scheduled for 13th April 2023 - 5 pm CET/GMT+2 (a.k.a. Brno time) via Google Meet. The meeting invite is automatically sent to attendees of previous meetings. If you'd like to join, please notify us at https://matrix.to/#/#esp-rs-community-meetins:matrix.org

You can find information from the previous meeting at https://github.com/esp-rs/rust/discussions

If you find a topic exciting, click Arrow Icon or Emoji, and your vote will give the preference to the topic.

[MabezDev]

compiler

• We might be able to revert Check for opt-level="z" in build.rs, provide feedback about dangers esp-hal#198 soon as the bug has been fixed in compiler builtins Fix panic due to overflow in riscv.rs and int/shift.rs rust-lang/compiler-builtins#521
• Testing LLVM 16 right now, no issues so far
• Investigated C functions arguments wrong alignment #171 and we now have a patch in review which should solve this (also requires some rustc target changes)

esp-hal

• Working on Upgrade to newest eh alpha esp-hal#468
• Reviewed & merged various PRs

rtic

Helping add RTIC support for bare metal, mostly just providing assistance. FYI there is a C3 demo that has a few examples here: https://github.com/perlindgren/esp32c3-test.

• Adding priority based interrupt preemption esp-hal#448
• Adding priority based interrupt preemption esp-riscv-rt#8

[SergioGasquez]

espup

• Reproducing and investigating: Windows environment variables set incorrectly during install espup#233

esp-hal

• Started working on soc for ESP32-H2

Templates

esp-template

• Update template project esp-template#71
• Fix typo in web-flash command esp-template#73

esp-idf-template

• Updating the template
  • Improve CI to cover all the cases
  • Remove Gitpod support
  • Add v5.0 choice
  • Remove v4.3.2 choice?
  • Update devcontainers

Wokwi

• Add ESP32-S3 std builder wokwi/wokwi-builders#35
• Minor updates
  • Update embuild version wokwi/wokwi-builders#34
  • Update prompts wokwi/wokwi-builders#33
  • Add sccache wokwi/wokwi-builders#32
• Update several Wokwi projects that were failing

espflash

• Reviewed and tested community contributions
• Fix config file parsing espflash#382
• Wanted to release rc4, but we will have to deal with The ESP32-C2/H2 do not support 40MHz flash frequency, which is the default, resulting in poor UX espflash#380 first

Ferrous System Training

• Update links for renaming the repo std-training#170

Rust on ESP book

• Reviewed Update Install chapter book#74 and Overhaul ecosystem overview book#75
  • https://github.com/f-hollow/Rust-on-ESP/pull/2
  • https://github.com/f-hollow/Rust-on-ESP/pull/1
• Started updating Tooling and Writing Your Own Application chapters

Other

• Fix ldproxy condition xtensa-toolchain#23

[JurajSadel]

esp-hal

• started working on ADC calibration, but still quite a lot of work required
• currently working on reading efuses
• other fixes by community: use bitflags to decode wakeup cause esp-hal#473, get_wakeup_cause: fix comparison error esp-hal#472

outreach

• the initial article is very close to being published
• I have to address a few review comments
• https://github.com/JurajSadel/outreach/blob/main/rust_on_esp_v2/blog_v4.md

esp-mbedtls

• reviewed Add ESP32-S3 example esp-mbedtls#1 and tested all examples

[bjoernQ]

esp-println

• improve logging
  • Improve log feature esp-println#42
    • colored log output
    • log targets and levels configurable at build time via env-variables

esp-wifi

• Use types from core::ffi:: esp-wifi-sys#159

• Feature "big-heap", fix calloc esp-wifi-sys#155

• Async BLE

  • Async ble esp-wifi-sys#161

esp-template

• Add exception-handler feature for esp-backtrace esp-template#74
  • use "exception-handler" feature for esp-backtrace by default
  • print some info about espflash 1.x vs 2.x
  • raised min-cargo-generate version

esp-hal

• Minor linker script additions esp-hal#470
  • to use the upper RAM segment as the heap in esp-wifi

esp-mbedtls

• https://github.com/esp-rs/esp-mbedtls
  • examples for ESP32, ESP32-C3, ESP32-S3
  • currently not possible for ESP32-S2 (need to look into trimming down memory requirements)

[georgik]

Rust Releases

• 1.68.0.0 - current release - https://github.com/esp-rs/rust-build/releases/tag/v1.68.0.0
• 1.69.0.0 - scheduled - around 24th April 2023

Future Events

• Digital Futures meetup - 20th April - Brno - Development with Matter for ESP32 + matter-rs - https://www.digital-futures.eu/meetups/bluetooth-low-energy-audio/
• MakerFaire - 10th-11th June - Prague - https://makerfaire.cz/mesto/praha/
• Espressif DevCon 2023 - 12th-13th September - Call for papers - https://devcon.espressif.com/

Experiments

Quicker deployment of Rust applications

• esp-launchpad for Rust application - https://github.com/espressif/esp-launchpad
  • used in C/C++ project esp-matter - https://github.com/espressif/esp-matter#documentation
  • used for Spooky Maze - https://github.com/georgik/esp32-spooky-maze-game#quick-start
  • issue: CORS restrict download of binaries - workaround: host on the same domain
• GitHub Action using a container to build multiple flashable targets as GH Release
  • https://github.com/georgik/esp32-spooky-maze-game/blob/main/.github/workflows/build-esp32-rust.yaml
  • cargo espflash save-image --chip ${CHIP} --release --merge spooky-maze-${FIRMWARE_DIR}.bin
  • 4 MB image - all-in-one - it can be improved by using partition support in esptool-js
  • problem with github user vs esp user in Docker
  • created issues: https://github.com/esp-rs/rust-build/issues

[playfulFence]

esp-hal

• working on Add support for the ESP32-H2 esp-hal#224
• implemented clocks_ll
  • check attached screenshot
• created esp32h2-hal package in my fork
  • adjusted linker for esp32h2
• next step is cleaning the code, getting rid of unused/useless moves, will create a starting PR ASAP

[JurajSadel]

Regarding the next meeting, we will be at the workshop on Thursday 27th of April, I don't know the starting time of the workshop right now. I will double-check with the organizers and I will update this comment when we have a complete schedule.