STM32H723 USB Example

[jasd33p]

I was trying to use the usb cdc acm example from STM32CubeMx for a Nucleo-H723ZG board. When i run the example, the device doesn't get detected at by my computer. 

[Imen.D]

Hello @jasd33p ,

Make sure to update and use latest release of STM32CubeMX. Maybe you have the same issue described in these posts and which is fixed in the CubeMX 6.11.0 version.

• Solved: USBx CDC-ACM (VCP) not enumerating on Nucleo-L452R... - STMicroelectronics Community
• Solved: STM32H573 USBX CDC ACM(DEVICE) - STMicroelectronics Community

This article may help you on your application: How to implement a dual CDC ACM USB device using t... - STMicroelectronics Community.

[jasd33p]

Hi. 

I noticed in the main.c that only dma and gpio init are called but nothing for the usb. 

[Pavel A.]

Nucleo-H723ZG examples do not include CDC.

https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/NUCLEO-H723ZG/Applications/USB_Device

Probably you're using some other source, and we don't know which.

[jasd33p]

I was using the stm32cubemx and the cdc example is there

[Karl Yamashita]

The USB is initialized when MX_ThreadX_Init is called.

Hopefully you're using the USB connector at the bottom edge of the board. Make sure you have a good USB cable with data signals and not a charging cable only cable.

[jasd33p]

I only see tx_kernel_enter() in Mx_ThreadX_Init. Do i have to add the USB code myself for the example? 

[Karl Yamashita]

No, you can see the USB files/folders that were added. With some referencing, starting with usb_otg.c, you can work backwards starting with MX_USB_OTG_HS_HCD_Init and see what function calls it, then the function before that and so on until MX_ThreadX_Init