embassy/embassy-usb/README.md

embassy-usb

TODO crate description

Configuration

embassy-usb has some configuration settings that are set at compile time, affecting sizes and counts of buffers.

They can be set in two ways:

• Via Cargo features: enable a feature like <name>-<value>. name must be in lowercase and use dashes instead of underscores. For example. max-interface-count-3. Only a selection of values is available, check Cargo.toml for the list.
• Via environment variables at build time: set the variable named EMBASSY_USB_<value>. For example EMBASSY_USB_MAX_INTERFACE_COUNT=3 cargo build. You can also set them in the [env] section of .cargo/config.toml. Any value can be set, unlike with Cargo features.

Environment variables take precedence over Cargo features. If two Cargo features are enabled for the same setting with different values, compilation fails.

MAX_INTERFACE_COUNT

Max amount of interfaces that can be created in one device. Default: 4.

Interoperability

This crate can run on any executor.