Trouble with configuring CTC for STM32F303ZE Nucleo board

[ALapi.1]

Hi,

I did the basic set up for configuring the usb micro A device connector added on the nucleo board (not the ST-Link connector). Clock is set for usb (HSE, 48MHz through PLL) and the USB_VIRTUAL is set on CTC.

I generated the code with Cube IDE and pushed it... and nothing. When I connect both usb (ST-Link and Virtual COM), my computer only sees St-Link.

Im I missing something? Is there a jumper to change place to active the second usb connector?

Thanks!

[Imen.D]

Hello @ALapi.1​ and welcome to the Community 🙂

I advise you to refer to the UM1974 and check the jumpers and pins configuration, in the section "6.4.1 Power supply input from ST-LINK/V2-1 USB connector" and Table 10. USB pins configuration.

When your question is answered, please close this topic by choosing Select as Best.

Imen

[waclawek.jan]

Start with checking what Imen said above.

Note that 'F3 needs to have a 1k5 pullup on DP. On the Nucleo144 schematics, it's connected through SB186 to USB_Disconnect/USB_GPIO_OUT/PG6.

Check if firmware sets PG6 to output and sets it to be high.

Other than that, debug as usually.

JW