Nucleo-F767ZI Serial data through USB to Go connector?

From the Nuc-144 user manual;

Remember that the STLink is a composite USB device, which has 3 functions:

- Debugging (HID)

- Mass storage (mBed, file drag and flash)

- Serial virtual user port (UART)

This USB virtual com port is usually connected to the target STM32 UART (check the schematic). This way, you can use a PC console with minimal SW development efforts.

This nucleo has two usb connectors. CN1 on the stlink and CN13 for USB OTG.

Before we start, you should read 6.9 and 6.10 in Nuc-144 user man. UN1974

If you just want to get going fast, the STLINK creates a VCP (on CN1 connector).

The stlink connects to PD8/PD9 on the 767 (see schematic figure 16/17 in UM)

These are also the alternate pins for USART3 TX/RX.

If you are using Cube, enable USART 3. This enable PB10/PB

Then gotoeach of

PB10/PB10 pins

Reassign them.

Generate your project. Add the following to your main loop;

/* USER CODE BEGIN 2 */
 uint8_t buffer[16] = ''Hello World

'';
 /* USER CODE END 2 */
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */
 /* USER CODE BEGIN 3 */
 HAL_UART_Transmit(&huart3, (uint8_t*)buffer, 13, 1000);
 HAL_Delay(1000);
 }
 /* USER CODE END 3 */�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?

in device manager, you find ports as shown below.

in this case, i have two nuc boards connected, one with normal stlink, and a 2nd with stlink reflashed with JLink firmware.

Goto your favorite terminal and connect your VCP comm port.

I think this is what your wanted to do. But....

If you really want to connect to CN13 using OTG.

The CN13 is dead, until you put some USB stuff in your project.

You have to setup USB_HS/FS and USB_CDC in your project.

Finally, going back to the UM, make sure you read the warning;