STM32U575 USB CDC

[beenwew]

Hello everyone,
I want to make a usb connection using USB_OTG_FS_DP and USB_OTG_FS_DM pins on the STM32U575 board. When I tried it with the examples found on the internet, it didn't work. When I tried the same method on the STM32F401 board, it was enough to select only USB_OTG_FS -> Device Only and Middleware -> USB_DEVICE -> virtual com port. What basic settings do I need to make to see my STM32U575 board as a virtual com port on the computer? I'm not very experienced in this. Thank you in advance for your help. Also, when I use the ux_device_cdc_acm example in CubeIDE, it does not appear as a virtual com port.

[Imen.D]

Hello @beenwew ,

Ensure that the correct driver is installed and verify that the heap and stack sizes are sufficient. 

Did you try the USB CDC example within STM32U5 firmware?

[beenwew]

Yes, I tried the ux_device_cdc_acm example for the nucleo u575zi in the cube ide application. All I did was debug and plug in the usb type c cable and upload this example to the card.

[beenwew]

When I used the ready code of CubeIDE, I managed to run it with only a typec cable, but I want to connect with DP and DM pins without typec. For this, I created a project without USBPD. In this case, the PC does not see the device on the NUCLEO board, but on the PCB board I designed, it sees it as an unknown device. DFU mode works fine on my PCB.
When I debug the code, it goes into an infinite loop in the

/* Wait here for the PendSV to take place. */

__tx_wait_here:

B __tx_wait_here // Wait for the PendSV to happen

section of the tx_thread_schedule library.