Rust ESP32 Community Meeting 2022-09-06

[georgik]

Please add topics and links to this discussion.

The meeting is scheduled for 6th September 2022 - 3 pm CEST/GMT+2 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

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[georgik]

Rust Toolchain 1.63.0.2

• rollback of 1.63.0.1 release, replaced by new release 1.63.0.2 - https://github.com/esp-rs/rust-build/releases/tag/v1.63.0.2

Deployment and bootstrapping

• updates in idf-env to support bootstrapping on Linux Feature/rust linux espressif/idf-env#49

Events

• Rust Linz 9th September - https://rust-linz.at/ - see you on-site ;-)

Experiments

• ESP32S3-BOX - Spooky maze - working accelerometer - https://github.com/georgik/esp32-spooky-maze-game

[SergioGasquez]

Rust installer

rust-build

• Fully document the build and release process rust-build#134: Documented build and release process

idf-env

We started porting rust-build scripts to rust!

• Feature/rust linux espressif/idf-env#49:
  • Adds support for installing esp-idf
  • Adds CI that builds, run tests, and run clippy/fmt checks

ESP Templates

esp-idf-template

• Update toolchain version and improve CI esp-idf-template#55

esp-template

• Update toolchain version and fix esp-hal revision esp-template#28: Tries to patch Pin version of paste to fix build errors esp-hal#176 and make the CI and templates build again

Ferrous System training

• Add wokwi simulation and web flashing support. std-training#89 waiting for review
• Wifi issues are now solved with: Clean branch flashing and wifi connection std-training#99

Wokwi

• Add builders for bare metal Rust on ESP32s wokwi/wokwi-builders#9: Wokwi now has builders for no-std, here are some examples:
  • [esp32c3-rust | rust | no-std ] template
  • [esp32c3 | rust | no-std ] blinky
  • [esp32c3 | rust | no-std ] template
  • [esp32s2 | rust | no-std ] blinky
  • [esp32s2 | rust | no-std ] template
  • [esp32 | rust | no-std ] template
  • [esp32 | rust | no-std ] blinky

Note

esp32 and esp32s2 blinky examples do not blink, they just turn the led on. It works fine for esp32c3. The code is from esp-hal examples and it's the same for the 3 targets. Is someone familiar with this?

Other

• SlintUI in ESP32S2 Kaluga:
  
• SlintUI in ESP-BOX:
  

[MabezDev]

esp-hal

• Periodic system timer & esp32s2 fixes & edge interrupt fixes esp-hal#167

compiler

• Issue with 128bit integers - reproducible test case found
• ABI in 1.62.0.2 is still not quite right - this may also be intertwined with some issues in LLVM
• Possible UB in LLVM backend when codegen-units > 1

[bjoernQ]

esp-hal

• SPI malfunction since #101 esp-hal#156
• Fix embedded-hal 0.2.x SPI implementation esp-hal#165
• temporary workaround for updated paste crate dependency: Pin version of paste to fix build errors esp-hal#176
• review Replace all float calculations with fixed ones esp-hal#173 and some others
• opened new issue for enhancement: Gapless SPI transfers esp-hal#180

Xtensa Rust Compiler

• opened Weird behavior with 1.63.0.2 on ESP32 with debug builds #135
• opened Printing / Formatting f64 crashes #136

esp-wifi

• use critical-section 1.0.0 as provided by the HAL now, remove the clumsy previous implementation
  • Update dependencies, use ESP-HAL's critical section implementation esp-wifi-sys#48
• use published HALs
• use periodic systimer from HAL - remove the clumsy previous implementation
• implement coex
  • currently only really works on ESP32-C3
  • reorganized the code to have a cleaner separation of BTLE and WiFi
    • potentially make it easier to add support for more chips
    • CoEx support (only works on ESP32-C3 for now), Refactoring esp-wifi-sys#51

esp-serial-dbg

• use critical-section 1.0.0
• fix gdb-stub implementation
• fix memory regions
• fix SW breakpoints
• some refactoring
• improve handling of the target (e.g. reset it if it's not responding, remove breakpoints on session end)
• finally works fine now for me (and Juraj) - would be nice to have some more user tests
• if it works fine (given the limits of the approach)
  • publish the library and the CLI to crates.io
  • include an option in esp-template to add it (including the VSCode debug config)

Other

• started rewriting the example BLE stack used by esp-wifi examples
  • will be available on crates.io
  • that way esp-wifi won't include any git / local dependencies anymore

[pedrominatel]

ESP32-C3 Rust Board

• Size of the pin header hole has been increased to 1.02mm (from ~0.78)
• Silkscreen fixed on D+ and D- (swapped the GPIOs)
• New version for production will be released as 1.3

esp-rs/esp-rust-board#50
https://github.com/esp-rs/esp-rust-board/tree/v1.3

[JurajSadel]

esp-serial-dbg

• tested breakpoints in RAM function for all chips

esp-hal

• Refactor all float data types Replace all float calculations with fixed ones esp-hal#173
• Started with Revise APIs ported from ESP32-HAL esp-hal#116, consists of 4 tasks
  • LEDC: it's possible to create multiple instances since the constructor doesn't take the LEDC peripheral Make it impossible to create multiple instances of LEDC esp-hal#181
  • Hit dead end with LEDC: it's possible to call get_channel multiple times with the same channel and different PINs: https://github.com/JurajSadel/esp-hal/tree/refactor_APIs
• Created Add support for other clock sources in timer driver esp-hal#174 to remove TODOs in Timer driver (add the option to select different CLK source)
  • EPS-IDF allows to set the clock source and also divider etc (lower level API)
  • Do we want to add additional lower-level constructor to take clock source and divider?
  • Question: How do we want to proceed with this in the future?
• reviewed Pin version of paste to fix build errors esp-hal#176

[jessebraham]

SVD + ESP-PACS

• Added a bunch of patches, released new SVD for ESP32-C2
• Added the new SVD to esp-pacs

ESP-HAL

• Released the first versions of each HAL in esp-hal
  • esp32-hal 0.4.0
  • esp32c3-hal 0.1.0
  • esp32s2-hal 0.1.0
  • esp32s3-hal 0.1.0
• Began working on esp32c2-hal
  • https://github.com/jessebraham/esp-hal/tree/feature/esp32c2
  • Handful of examples working already
• Began work on the GPIO module re-write
  • Still very in-progress, but able to perform some actions already (eg. toggle IO)

MISCELLANEOUS

• Published version 0.3.0 of esp-println, with added support for the ESP32-C2
  • Add support for the ESP32-C2 (aka ESP8684) esp-println#11
  • Bump the version and update the README esp-println#12
• Improved the CI workflow of esp-backtrace to cover all combinations of features, added support for the ESP32-C2
  • Update the CI to check all combinations of chip/printer esp-backtrace#7
  • Add support for the ESP32-C2 esp-backtrace#8
• Improved the CI workflow of esp-template
  • Make workflow succeed in forks, and speed it up considerably esp-template#27
  • Now works in forks, runs faster
• Added support for the ILI9342C display (used by the ESP32-S3-BOX) to mipidsi
  • Add support for the ILI9342C almindor/mipidsi#25
  • Supports 16-bit Rgb565 and 18-bit Rgb666 modes

[georgik]

Next meeting: 20th September at 3 pm (GMT+2) Brno time - we keep the same hour as 2022-09-06 meeting.