Working CDC-ACM host->device

examples/nrf/src/bin/usb/cdc_acm.rs

@@ -38,14 +38,15 @@ const REQ_SET_CONTROL_LINE_STATE: u8 = 0x22;
 ///   can be sent if there is no other data to send. This is because USB bulk transactions must be
 ///   terminated with a short packet, even if the bulk endpoint is used for stream-like data.
 pub struct CdcAcmClass<'d, D: Driver<'d>> {
-    comm_if: InterfaceNumber,
-    comm_ep: D::EndpointIn,
-    data_if: InterfaceNumber,
-    read_ep: D::EndpointOut,
-    write_ep: D::EndpointIn,
-    line_coding: LineCoding,
-    dtr: bool,
-    rts: bool,
+    // TODO not pub
+    pub comm_if: InterfaceNumber,
+    pub comm_ep: D::EndpointIn,
+    pub data_if: InterfaceNumber,
+    pub read_ep: D::EndpointOut,
+    pub write_ep: D::EndpointIn,
+    pub line_coding: LineCoding,
+    pub dtr: bool,
+    pub rts: bool,
 }
 
 impl<'d, D: Driver<'d>> CdcAcmClass<'d, D> {

examples/nrf/src/bin/usb/main.rs

@@ -14,7 +14,9 @@ use embassy_nrf::interrupt;
 use embassy_nrf::pac;
 use embassy_nrf::usb::{self, Driver};
 use embassy_nrf::Peripherals;
+use embassy_usb::driver::EndpointOut;
 use embassy_usb::{Config, UsbDeviceBuilder};
+use futures::future::{join, select};
 
 use crate::cdc_acm::CdcAcmClass;
 
@@ -49,5 +51,16 @@ async fn main(_spawner: Spawner, p: Peripherals) {
     let mut class = CdcAcmClass::new(&mut builder, 64);
 
     let mut usb = builder.build();
-    usb.run().await;
+
+    let fut1 = usb.run();
+    let fut2 = async {
+        let mut buf = [0; 64];
+        loop {
+            let n = class.read_ep.read(&mut buf).await.unwrap();
+            let data = &buf[..n];
+            info!("data: {:x}", data);
+        }
+    };
+
+    join(fut1, fut2).await;
 }