embassy/docs/modules/ROOT/pages/faq.adoc
2023-11-21 16:01:46 +01:00

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= Frequently Asked Questions
These are a list of unsorted, commonly asked questions and answers.
Please feel free to add items to link:https://github.com/embassy-rs/embassy/edit/main/docs/modules/ROOT/pages/faq.adoc[this page], especially if someone in the chat answered a question for you!
== Missing main macro
If you see an error like this:
[source,rust]
----
#[embassy_executor::main]
| ^^^^ could not find `main` in `embassy_executor`
----
You are likely missing some features of the `embassy-executor` crate.
For Cortex-M targets, consider making sure that ALL of the following features are active in your `Cargo.toml` for the `embassy-executor` crate:
* `arch-cortex-m`
* `executor-thread`
* `nightly`
For Xtensa ESP32, consider using the executors and `#[main]` macro provided by your appropriate link:https://crates.io/crates/esp-hal-common[HAL crate].