Rust ESP32 Community Meeting 2024-03-14

[SergioGasquez]

Please add topics and links to this discussion.

The meeting is scheduled for 14th March 2024 - 5 pm CET/GMT+1 (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.

[georgik]

Rust Releases

• 1.76.0.1 - latest release with LLVM 17 and GCC 13 - https://github.com/esp-rs/rust-build/releases/tag/v1.76.0.1
• 1.77.0.0 - scheduled official release with LLVM 17 and GCC 13 - 24th April 2024

ESP-IDF Releases

• New releases of ESP-IDF: 5.2.1
• Available releases of ESP-IDF: 5.2.1, 5.1.2, 5.0.6, 4.4.7

Wokwi

• plugin available for Jetbrains IDEs

Slint

• updated support for ESP-IDF 5.3 and P4 - https://github.com/slint-ui/slint/
• simulation of MIPI-DSI works well

RainMaker

• RainMaker - https://github.com/shreyash-b/rainmaker-r - Rust std - ESP or Linux

Events

• Embedded World 2024 - Hall 3A, Booth 419 | Nuremberg, Germany
• DevCon 2023 - Call for speakers - https://devcon.espressif.com/
• FIT VUT Brno - ESP32 in IoT Projects - talk - 15th March
• Tech Meetup Ostrava - Rust - 17th April

[jessebraham]

ESP-PRINTLN

• Version 0.9.1 esp-println#85
  • https://crates.io/crates/esp-println/0.9.1

ESP-BACKTRACE

• Version 0.11.1 esp-backtrace#55
  • https://crates.io/crates/esp-backtrace/0.11.1

ESP-PACS

• Clean up check action, CI workflow updates, bump MSRV to 1.76.0 esp-pacs#204

ESP-HAL

• Fix some clippy/build warnings, clean up root Cargo manifest esp-hal#1230
• Initial version of README.md for the examples package esp-hal#1237
• Mostly rewrite esp-hal/README.md (oops :) ) JurajSadel/esp-hal#4
• Allow specifying an output directory when building documentation esp-hal#1241
• Add a workflow to build and deploy esp-hal documentation to GitHub Pages esp-hal#1248
• New package releases esp-hal#1249
  • https://crates.io/crates/esp-riscv-rt/0.7.0
  • https://crates.io/crates/esp-hal-procmacros/0.9.0
  • https://crates.io/crates/esp-hal/0.16.0
  • https://crates.io/crates/esp-hal-smartled/0.9.0
• Tweak the documentation URL slightly esp-hal#1250
• Begin next release cycle esp-hal#1253
• Deprecated old chip-specific HAL packages (published new patch releases)
• Create the esp-metadata package, update esp-hal build script to use it esp-hal#1256
• Create an xtask subcommand to generate eFuse fields esp-hal#1258
• Un-pin the defmt package's version, bump esp-println and esp-backtrace dependency versions esp-hal#1264
• Display a warning banner linking to docs.esp-rs.org when documentation is hosted on docs.rs esp-hal#1266
• New esp-hal release esp-hal#1268
  • https://crates.io/crates/esp-hal/0.16.1
• Feature gate embedded-hal@0.2.x implementations, rename eh1 feature to embedded-hal esp-hal#1273
• Remove package-level type exports esp-hal#1275
• Simplify building documentation, automatically generate documentation index esp-hal#1279
• Create safe wrappers for some ROM functions in the rom module esp-hal#1290

[SergioGasquez]

esp-flasher-stub

• Update ChangeBaudrate processing esp-flasher-stub#50
• Bump MSRV esp-flasher-stub#51

esp-template

• Use unified esp-hal esp-template#149

espflash

• Prepare 3.0.0-rc.2 espflash#606
• Update S3 stub espflash#607
• Update stubs espflash#610
• Prepare 3.0.0 release espflash#611
• Update runner for arch64 and armv7 linux jobs espflash#612
• Start new dev cycle espflash#613
• espflash v3.0.0 release!
  • 2 issues opened after the release:
    • esp32c2 use espflash v3 is error，v2.1 is normal espflash#614 - I think its an user error, not an issue
    • Error: espflash::connection_failed espflash#615

espup

• Cargo update to avoid a vulnerability espup#419

wokwi

• Update base images wokwi/wokwi-builders#62
• Updated Wokwi examples and templates to use unified esp-hal
  • Also updated Wokwi examples of no_std-training

esp-hal

• Help reviewing some PRs
• HIL
  • We already have some HIL set up! 🚀
  • Its working fine for H2 and C6 and testing (at least, partially) aes, gpio, uart and spi_full_duplex, : https://github.com/esp-rs/esp-hal/actions/runs/8280334758
  • We had several issues with HIL VMs:
    • GH actions jobs were running under tomas user. Now they run under espressif.
    • Some VMs had problems detecting (or they were disappearing after being detected) the targets and reloading them.
      • We still dont know the root cause of this. Tomas removed an unused VM (with a rustboard) and everything started working.
    • probe-rs was disappearing after running the HIL workflow:
      • swatinem/rust-cache action has a known issue:

        The cache cleaning process currently removes all the files from ~/.cargo/bin that were present before the action ran (for example rustc).

        • Either we don't use the action or we make the file immutable sudo chattr +i /home/espressif/.cargo/bin/probe-rs
  • Board support:
    • Maybe tomorrow we will have a rebased version of the probe-rs branch that adds support for probe-rs test which will enable C3 and C2.
    • semihosting and embedded-test do not support Xtensa
  • Documentation could be improved, atm we document the wiring and VM setup in: https://github.com/esp-rs/esp-hal/tree/feat/hil-testing/hil-test#running-tests-remotes-ie-on-self-hosted-runners

others

• esp-idf-hal is broken for H2
  • Fix is merged and will be released in ~2 weeks
• Place the corresponding svd in esp-template for debugging
• Should we create an esp-flasher-stub release?
  • We used a patched esp-hal to generate the stubs being used in espflash.

[bjoernQ]

esp-hal

• simplify DMA API

  • Simplify dma usage esp-hal#1238

• continued with runtime interrupt binding

  • first PR got merged, next is DMA which is probably the largest chunk of work
    • Runtime interrupt binding esp-hal#1231
    • Don't use #[interrupt] in GPIO driver esp-hal#1278

• deeper analysis of interrupt latency on both Xtensa and RISCV

  • Improve interrupt latency (especially on Xtensa) esp-hal#1162
  • TL;DR cache misses are bad, avoiding hitting flash is hard
    • we extracted a few action items which will improve things

esp-wifi

• release 0.4.0

esp-ieee802154

• Use esp-hal 0.16.1 esp-ieee802154#20

esp-openthread

• Update esp-hal, make example work for ESP32-H2, too esp-openthread#6
  • update esp-hal and esp-ieee802154
  • example now easy to run on ESP32-H2 (thanks to the unified esp-hal)

[JurajSadel]

esp-hal

• looking into P4 UART
• started looking into H2 sleep features -> after internal discussion will focus on missing C6 features instead
• worked on docs updates( in the end both reworked by @jessebraham :D ):
  • Update esp-hal/README esp-hal#1228
  • Migration guide for updating to esp-hal@0.16.x esp-hal#1222
• reviewed a bunch of PRs

Embedded Rust Workshop in Copenhagen

• attended with @playfulFence
• around 50 people with different backgrounds and experience in embedded and Rust
• we got nice feedback from participants, and we are waiting for the final sum-up and project reports from the event
• successful event in my honest opinion

[MabezDev]

esp-hal

• Fix core1 startup esp-hal#1286
• Reserve esp32 ROM stacks and adjust dram2 accordingly esp-hal#1289
• Use ROM memcpy and friends over compiler-builtins function esp-hal#1255