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Modern embedded framework, using Rust and async.
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Usb Serial example not working for stm32f3 #1993

Open Barbacamanitu opened 11 months ago

Barbacamanitu commented 11 months ago

I'm trying to get the serial usb example working for my STM32F3Discovery board. I'm running the example as is, except I'm omitting the lines

// Needed for nucleo-stm32f303ze
    let mut dp_pullup = Output::new(p.PG6, Level::Low, Speed::Medium);
    Timer::after(Duration::from_millis(10)).await;
    dp_pullup.set_high();

since I'm not using that chip. Once I flash the code to my board, I unplug my usb from the st-link port and plug it into the usb-user port. Windows gives me an error in device manager: 

Windows has stopped this device because it has reported problems. (Code 43)

A request for the USB device descriptor failed.

I've also tried doing some serial tests using this board with Stm32duino. I was able to get serial communication working with that. It seems like the chip is not providing a correct descriptor. Does anyone know why this might be?

Dirbaio commented 11 months ago

can you post log output of the firmware with DEFMT_LOG=trace?

Barbacamanitu commented 11 months ago 
0.000000 DEBUG rcc: Clocks { sys: Hertz(48000000), apb1: Hertz(24000000), apb1_tim: Hertz(48000000), apb2: Hertz(24000000), apb2_tim: Hertz(48000000), ahb1: Hertz(48000000), adc: None, adc34: None }
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:130
0.000335 INFO Hello World!
└─ src\main.rs:47
0.200866 TRACE allocating type=Interrupt mps=8 interval_ms=255, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.201324 TRACE   index=1 addr=64 len=8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.201751 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=Out
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.202178 TRACE   len_bits = 8400
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.202423 TRACE   index=2 addr=72 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.202850 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.203308 TRACE   index=2 addr=136 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.203735 INFO USB: device_descriptor used: 18
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.204010 INFO USB: config_descriptor used: 62
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.204254 INFO USB: bos_descriptor used: 12
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.204528 INFO USB: control_buf size: 7
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.204803 TRACE allocating type=Control mps=64 interval_ms=0, dir=Out
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.205200 TRACE   len_bits = 8400
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.205444 TRACE   index=0 addr=200 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.205841 TRACE allocating type=Control mps=64 interval_ms=0, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.206268 TRACE   index=0 addr=264 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.206665 TRACE enabled
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.207000 TRACE usb: power detected
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.207214 TRACE RESET
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.207611 TRACE usb: reset
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.207855 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.208068 TRACE wait_enabled OUT WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.209777 TRACE usb: resume
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.210021 TRACE usb: suspend
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117

Here you go. I only have one mini-usb cord at the moment though, so this won't include any information about me plugging into the usb-user port.

Dirbaio commented 11 months ago

so this won't include any information about me plugging into the usb-user port.

this is needed to debug the problem! :)

Barbacamanitu commented 11 months ago

I'll order another usb cable and try that.

I tried disabling and re-enabling the USB device in device manager, and one time it worked. It showed up as COM7 and I was able to connect to it with Putty. But sending data had no effect. I haven't be able to get this to happen again. I keep getting errors about device descriptor or SetAddress failing.

I'll respond when I get a new usb cable. Thanks

Barbacamanitu commented 11 months ago

I got it working... sort of. I adapted the code from here: https://github.com/embassy-rs/embassy/blob/main/examples/nrf52840/src/bin/usb_serial_winusb.rs

In the examples for stm32f3, there is only the usb_serial.rs. I didn't realize that windows has special requirements for recognizing usb devices.

Here is my full code currently: 

bind_interrupts!(struct Irqs {
    USB_LP_CAN_RX0 => usb::InterruptHandler<peripherals::USB>;
});

// This is a randomly generated GUID to allow clients on Windows to find our device
const DEVICE_INTERFACE_GUIDS: &[&str] = &["{EAA9A5DC-30BA-44BC-9232-606CDC875321}"];

#[embassy_executor::main]
async fn main(spawner: Spawner) {
    let mut config = Config::default();
    config.rcc.hse = Some(mhz(8));
    config.rcc.sysclk = Some(mhz(48));
    config.rcc.pclk1 = Some(mhz(24));
    config.rcc.pclk2 = Some(mhz(24));
    config.rcc.pll48 = true;
    let p = embassy_stm32::init(config);
    let mut leds = { Leds::new(p.PE9, p.PE8, p.PE10, p.PE15, p.PE11, p.PE14, p.PE12, p.PE13) };
    //let mut stepper1 = StepperMotor::new(p.PC3.degrade(), p.PC1.degrade(), 500, 2000, 200);

    // Create the driver, from the HAL.
    let driver = Driver::new(p.USB, Irqs, p.PA12, p.PA11);

    // Create embassy-usb Config
    let mut config = embassy_usb::Config::new(0xc0dd, 0xcaff);
    config.manufacturer = Some("Embassy");
    config.product = Some("USB-serial example");
    config.serial_number = Some("12345678");
    config.max_power = 100;
    config.max_packet_size_0 = 64;

    config.device_class = 0x02;

    // Create embassy-usb DeviceBuilder using the driver and config.
    // It needs some buffers for building the descriptors.
    let mut device_descriptor = [0; 256];
    let mut config_descriptor = [0; 256];
    let mut bos_descriptor = [0; 256];
    let mut msos_descriptor = [0; 256];
    let mut control_buf = [0; 64];

    let mut state = State::new();

    let mut builder = Builder::new(
        driver,
        config,
        &mut device_descriptor,
        &mut config_descriptor,
        &mut bos_descriptor,
        &mut msos_descriptor,
        &mut control_buf,
    );

    builder.msos_descriptor(windows_version::WIN10, 2);

    // Create classes on the builder.
    let mut class = CdcAcmClass::new(&mut builder, &mut state, 64);

    let msos_writer = builder.msos_writer();
    msos_writer.configuration(0);
    msos_writer.function(InterfaceNumber(0));
    msos_writer.function_feature(msos::CompatibleIdFeatureDescriptor::new("WINUSB", ""));
    msos_writer.function_feature(msos::RegistryPropertyFeatureDescriptor::new(
        "DeviceInterfaceGUIDs",
        msos::PropertyData::RegMultiSz(DEVICE_INTERFACE_GUIDS),
    ));

    // Build the builder.
    let mut usb = builder.build();

    // Run the USB device.
    let usb_fut = usb.run();

    // Do stuff with the class!
    let echo_fut = async {
        loop {
            class.wait_connection().await;
            info!("Connected");
            let _ = echo(&mut class).await;

            info!("Disconnected");
        }
    };

    // Run everything concurrently.
    // If we had made everything `'static` above instead, we could do this using separate tasks instead.
    join(usb_fut, echo_fut).await;
}
struct Disconnected {}

impl From<EndpointError> for Disconnected {
    fn from(val: EndpointError) -> Self {
        match val {
            EndpointError::BufferOverflow => panic!("Buffer overflow"),
            EndpointError::Disabled => Disconnected {},
        }
    }
}

async fn echo<'d, T: Instance + 'd>(
    class: &mut CdcAcmClass<'d, Driver<'d, T>>,
) -> Result<(), Disconnected> {
    let mut buf = [0; 64];
    loop {
        let n = class.read_packet(&mut buf).await?;
        let data = "test".as_bytes();
        //info!("data: {:x}", data);
        class.write_packet(data).await?;
    }
}

I say that I got it sort of working, because I have to take a few extra steps before I can communicate via serial. When I plug my dev board into my PC via the USB USER port, I get the same error as before:

Windows has stopped this device because it has reported problems. (Code 43)

A request for the USB device descriptor failed.

However, if I leave the board plugged in, then go to device manager and disable the USB device with the error, then enable it again, the error goes away. I then get a new USB Serial Device (COM7) appearing, but with an error 

This device cannot start. (Code 10)

A device which does not exist was specified.

If I disable and re-enable this device, I get a working USB Serial Device (COM7). I can open putty and connect to my board, and on every keystroke it sends back "test", so it seems to be working.

I'm at a loss for why this process seems to fix it. It seems to fix the issue every time. Obviously, it's far from idea. That's all the information I can give until I get the second usb cable.

Barbacamanitu commented 11 months ago

I got a second usb cable at walmart. Here's the log:


0.000000 DEBUG rcc: Clocks { sys: Hertz(48000000), apb1: Hertz(24000000), apb1_tim: Hertz(48000000), apb2: Hertz(24000000), apb2_tim: Hertz(48000000), ahb1: Hertz(48000000), adc: None, adc34: None }
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:130
0.250732 TRACE allocating type=Interrupt mps=8 interval_ms=255, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.251190 TRACE   index=1 addr=64 len=8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.251647 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=Out
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.252075 TRACE   len_bits = 8400
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.252319 TRACE   index=2 addr=72 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.252746 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.253173 TRACE   index=2 addr=136 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.256805 INFO USB: device_descriptor used: 18
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.257049 INFO USB: config_descriptor used: 62
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.257324 INFO USB: bos_descriptor used: 40
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.257568 INFO USB: msos_descriptor used: 178
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.257843 INFO USB: control_buf size: 64
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:143
0.258117 TRACE allocating type=Control mps=64 interval_ms=0, dir=Out
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.258544 TRACE   len_bits = 8400
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.258789 TRACE   index=0 addr=200 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.259155 TRACE allocating type=Control mps=64 interval_ms=0, dir=In
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.259582 TRACE   index=0 addr=264 len=64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.260009 TRACE enabled
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.260314 TRACE usb: power detected
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.260528 TRACE RESET
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.260925 TRACE usb: reset
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.261169 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.261383 TRACE wait_enabled OUT WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
0.263122 TRACE usb: resume
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
0.263336 TRACE usb: suspend
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.249389 TRACE RESET
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.249786 TRACE usb: reset
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.250061 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.282653 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.283020 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.283203 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 256, index: 0, length: 64 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.283721 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.283905 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.284301 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.284576 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.284790 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.285125 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.285339 TRACE control request: Request { direction: Out, request_type: Standard, recipient: Device, request: 5, value: 54, index: 0, length: 0 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.285797 TRACE   control out data: []
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.286102 TRACE control: accept
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.286285 TRACE control: accept WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.286499 TRACE control: accept OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.286682 TRACE setting addr: 54
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.286956 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.296936 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.297271 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.297485 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 256, index: 0, length: 18 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.298004 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.298187 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.298583 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.298858 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.306091 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.306457 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.306640 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 512, index: 0, length: 255 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.307159 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.307373 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.308135 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.308410 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.308624 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.308959 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.309173 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 3840, index: 0, length: 255 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.309692 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.309875 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.310455 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.310699 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.310943 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.311279 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.311492 TRACE control request: Request { direction: In, request_type: Vendor, recipient: Device, request: 2, value: 0, index: 7, length: 178 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.312011 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.312194 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.312988 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.313201 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.313385 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.314178 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.314392 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.314605 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.315521 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.315734 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.316070 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.316284 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 771, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.316986 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.317169 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.317535 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.317810 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.318023 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.318359 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.318572 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 768, index: 0, length: 255 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.319091 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.319274 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.319549 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.319824 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.320007 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.320373 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.320556 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 770, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.321411 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.321594 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.322143 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.322387 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.395477 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.395812 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.396026 TRACE control request: Request { direction: Out, request_type: Standard, recipient: Device, request: 9, value: 1, index: 0, length: 0 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.396484 TRACE   control out data: []
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.396759 DEBUG SET_CONFIGURATION: configured
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:130
6.397247 TRACE set_enabled EndpointAddress(81) true
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.397583 TRACE EPR before: 0601
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.397857 TRACE EPR after: 0621
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.398254 TRACE set_enabled EndpointAddress(2) true
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.398559 TRACE EPR before: 0002
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.398864 TRACE EPR after: 3002
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.399200 TRACE set_enabled EndpointAddress(82) true
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.399505 TRACE EPR before: 3002
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.399810 TRACE EPR after: 3022
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.400085 TRACE control: accept
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.400299 TRACE control: accept WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.400512 TRACE control: accept OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.400695 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.400939 TRACE wait_enabled OUT OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.401123 TRACE READ WAITING, buf.len() = 64
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.401550 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.401916 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.402099 TRACE control request: Request { direction: In, request_type: Class, recipient: Interface, request: 33, value: 0, index: 0, length: 7 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.402618 DEBUG Sending line coding
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:130
6.402862 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.403045 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.403320 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.403594 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.404144 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.404510 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.404693 TRACE control request: Request { direction: Out, request_type: Class, recipient: Interface, request: 32, value: 0, index: 0, length: 7 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.405212 TRACE data_out WAITING, buf.len() = 7
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.405517 TRACE READ DONE, rx_len = 7
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.405883 TRACE   control out data: [40, 1f, 00, 00, 00, 00, 08]
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.406341 DEBUG Set line coding to: LineCoding { stop_bits: One, data_bits: 8, parity_type: None, data_rate: 8000 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:130
6.406738 TRACE control: accept
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.406921 TRACE control: accept WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.407165 TRACE control: accept OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.407379 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.407592 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.407928 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.408142 TRACE control request: Request { direction: In, request_type: Class, recipient: Interface, request: 33, value: 0, index: 0, length: 7 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.408630 DEBUG Sending line coding
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:130
6.408874 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.409057 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.409362 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.409606 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.415954 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.416290 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.416503 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 768, index: 0, length: 255 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.417022 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.417205 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.417449 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.417724 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.417968 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.418304 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.418518 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 768, index: 0, length: 255 }
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.419036 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.419219 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.419464 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.419738 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.419952 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.420288 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.420501 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 769, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.421173 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.421356 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.421722 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.421997 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.422210 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.422546 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.422729 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 769, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.423400 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.423583 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.423950 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.424194 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.424438 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.424774 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.424987 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 770, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.425811 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.425994 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.426544 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.426818 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.427032 TRACE READ DONE, rx_len = 8
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.427368 TRACE SETUP read ok
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.427581 TRACE control request: Request { direction: In, request_type: Standard, recipient: Device, request: 6, value: 770, index: 1033, length: 255 }        
└─ C:\dev\embedded\embassy\embassy-usb\src\fmt.rs:117
6.428405 TRACE control: data_in
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.428588 TRACE WRITE WAITING
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.429168 TRACE WRITE OK
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117
6.429412 TRACE SETUP read waiting
└─ C:\dev\embedded\embassy\embassy-stm32\src\fmt.rs:117

Something strange happens when using both usb cables. I don't get any errors if I plug in the second usb cable once the board is running from the ST-Link usb port. If I plug in ONLY the USB USER port, I always get an error. Every time I plug USER USB in after the other port is already active, I get no errors.