Merge pull request #4975 from tonarino/cdm-adm-control

Expose `dtr()` and `rts()` on `cdc_acm::ControlChanged`

2 files changed, 11 insertions, 0 deletions

diff --git a/embassy-usb/CHANGELOG.md b/embassy-usb/CHANGELOG.md
index f90875166..431f4ddde 100644
--- a/embassy-usb/CHANGELOG.md
+++ b/embassy-usb/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add support for USB HID Boot Protocol Mode 
 - Bump usbd-hid from 0.8.1 to 0.9.0
 - Fix a bug where CDC ACM BufferedReceiver repeats data when its future is dropped
+- Expose `dtr()` and `rts()` on `cdc_acm::ControlChanged`
 
 ## 0.5.1 - 2025-08-26
 
diff --git a/embassy-usb/src/class/cdc_acm.rs b/embassy-usb/src/class/cdc_acm.rs
index c990b679e..ab2311f4e 100644
--- a/embassy-usb/src/class/cdc_acm.rs
+++ b/embassy-usb/src/class/cdc_acm.rs
@@ -366,6 +366,16 @@ impl<'d> ControlChanged<'d> {
     pub async fn control_changed(&self) {
         self.control.changed().await;
     }
+
+    /// Gets the DTR (data terminal ready) state
+    pub fn dtr(&self) -> bool {
+        self.control.dtr.load(Ordering::Relaxed)
+    }
+
+    /// Gets the RTS (request to send) state
+    pub fn rts(&self) -> bool {
+        self.control.rts.load(Ordering::Relaxed)
+    }
 }
 
 /// CDC ACM class packet sender.