44 lines
1.4 KiB
Markdown
44 lines
1.4 KiB
Markdown
# 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.
|
|
|
|
## Minimum supported Rust version (MSRV)
|
|
|
|
This crate requires nightly Rust, due to using "async fn in trait" support.
|
|
|
|
## License
|
|
|
|
This work is licensed under either of
|
|
|
|
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
|
|
<http://www.apache.org/licenses/LICENSE-2.0>)
|
|
- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)
|
|
|
|
at your option.
|
|
|