update log statements

advanced/common/usb/src/lib.rs

@@ -1,5 +1,4 @@
 //! Some USB 2.0 data types
-// NOTE this is a partial solution to exercise `usb-2`
 
 #![deny(missing_docs)]
 #![deny(warnings)]
@@ -51,33 +50,22 @@ impl Request {
         windex: u16,
         wlength: u16,
     ) -> Result<Self, ()> {
+        // Request Codes
         // see table 9-4 (USB specification)
         const SET_ADDRESS: u8 = 5;
-        const GET_DESCRIPTOR: u8 = 6;
 
+        // TODO implement another branch handling GET_DESCRIPTOR requests:
+        //
+        // 1. get descriptor type and descriptor index from `wValue`
+        //
+        // 2. confirm that
+        //    - the descriptor type is DEVICE, i.e. of value 1 and
+        //    - the descriptor index is 0 (i.e. it is the first implemented descriptor for this type) and
+        //    - `wIndex` is 0 (i.e. no language ID since it's not a string descriptor)
+        //
+        // For more details, see https://embedded-trainings.ferrous-systems.com/setup-stage.html
 
-        if bmrequesttype == 0b10000000 && brequest == GET_DESCRIPTOR {
-            // see table 9-5
-            const DEVICE: u8 = 1;
-
-            // 1. get descriptor type and descriptor index from wValue
-            let desc_ty = (wvalue >> 8) as u8;
-            let desc_index = wvalue as u8;
-            let langid = windex;
-
-            // 2. confirm that the descriptor
-            //    - is of type DEVICE and
-            //    - has descriptor index 0 (i.e. it is the first implemented descriptor for this type) and
-            //    - has wIndex 0 (i.e. no language ID since it's not a string descriptor)
-            if desc_ty == DEVICE && desc_index == 0 && langid == 0 {
-                Ok(Request::GetDescriptor {
-                    descriptor: Descriptor::Device,
-                    length: wlength,
-                })
-            } else {
-                Err(())
-            }
-        } else if bmrequesttype == 0b00000000 && brequest == SET_ADDRESS {
+        if bmrequesttype == 0b00000000 && brequest == SET_ADDRESS {
             // Set the device address for all future accesses.
             // (Needed to successfully init when conected to Apple devices)
             // Section 9.4.6 Set Address of the USB specification explains which values for wvalue,
@@ -90,6 +78,7 @@ impl Request {
                 Err(())
             }
         } else {
+            defmt::println!("unhandled case in `Request` parser");
             Err(())
         }
     }
@@ -207,5 +196,4 @@ mod tests {
         assert!(Request::parse(0b0000_0000, 0x09, 0x00_01, 0, 1).is_err());
         //                                                    ^
     }
-}
-
+}

advanced/firmware/src/bin/usb-1.rs

@@ -44,7 +44,7 @@ mod app {
     }
 
     fn on_event(_usbd: &USBD, event: Event) {
-        defmt::println!("USB: {:?} @ {:?}", event, dk::uptime());
+        defmt::println!("USB: {} @ {}", event, dk::uptime());
     
         match event {
             Event::UsbReset => todo!(),

advanced/firmware/src/bin/usb-2-solution.rs

@@ -42,7 +42,7 @@ mod app {
     }
 
     fn on_event(usbd: &USBD, event: Event) {
-        defmt::println!("USB: {:?} @ {:?}", event, dk::uptime());
+        defmt::println!("USB: {} @ {}", event, dk::uptime());
     
         match event {
             Event::UsbReset => {

advanced/firmware/src/bin/usb-4-solution.rs

@@ -47,7 +47,7 @@ mod app {
         }
     }
     fn on_event(usbd: &USBD, ep0in: &mut Ep0In, state: &mut State, event: Event) {
-        defmt::println!("USB: {:?} @ {:?}", event, dk::uptime());
+        defmt::println!("USB: {} @ {}", event, dk::uptime());
     
         match event {
             Event::UsbReset => {

embedded-workshop-book/src/setup-stage.md

@@ -72,12 +72,14 @@ modify `usb-2.rs` to read `USBD` registers and parse the SETUP data when an EP0S
 When you have successfully received a GET_DESCRIPTOR request for a Device descriptor you are done. You should see an output like this:
 
 ``` console
-INFO:usb_2 -- USB: UsbReset @ 438.842772ms
-INFO:usb_2 -- USB: UsbEp0Setup @ 514.984128ms
-...
-INFO:usb_2 -- SETUP: bmrequesttype: 128, brequest: 6, wlength: 64, windex: 0, wvalue: 256
-INFO:usb_2 -- GET_DESCRIPTOR Device [length=64]
-INFO:usb_2 -- Goal reached; move to the next section
+USB: UsbReset @ Duration { secs: 0, nanos: 361145018 }
+USB: UsbEp0Setup @ Duration { secs: 0, nanos: 402465820 }
+SETUP: bmrequesttype: 0, brequest: 5, wlength: 0, windex: 0, wvalue: 10
+USB: UsbEp0Setup @ Duration { secs: 0, nanos: 404754637 }
+SETUP: bmrequesttype: 128, brequest: 6, wlength: 8, windex: 0, wvalue: 256
+GET_DESCRIPTOR Device [length=8]
+Goal reached; move to the next section
+`dk::exit()` called; exiting ...
 ```
 
 > Note: `wlength` / `length` can vary depending on the OS, USB port (USB 2.0 vs USB 3.0) or the presence of a USB hub so you may see a different value.