add docs for usb version variants

1 files changed, 2 insertions, 0 deletions

diff --git a/embassy-usb/src/builder.rs b/embassy-usb/src/builder.rs
index 6c42b07dc..008a10f72 100644
--- a/embassy-usb/src/builder.rs
+++ b/embassy-usb/src/builder.rs
@@ -12,7 +12,9 @@ use crate::{Handler, Interface, UsbDevice, MAX_INTERFACE_COUNT, STRING_INDEX_CUS
 #[non_exhaustive]
 /// Allows Configuring the Bcd USB version below 2.1
 pub enum UsbVersion {
+    /// Usb version 2.0
     Two = 0x0200,
+    /// Usb version 2.1
     TwoOne = 0x0210,
 }