USB enumeration issue with Nucleo board acting as USB Host CDC

[NS.8]

I am working on STM32H7532ZIT6 – NUCLEO H753ZI. Trying to connect LTE modem (Quectel EVal board ) via USB I/f using a female connector in between. Programmed STM as USB host at 48MHZ and disabled VBUS. I see that the Enumeration fails as the API USBH_Get_DevDesc. Tried sample code online from several sites and none works

[Walid ZRELLI]

Hello @NS.8​,

Welcome to ST Community :smiling_face_with_smiling_eyes:

You can refer to the following example provided under the H7 Firmware Package:

• Projects\STM32H743I-EVAL\Applications\USB_Host\CDC_Standalone

As well, take a look at this video, it may help you.

BeST Regards,

Walid

[NS.8]

Hi Walid,

Thanks for the answer. I am trying to bring the nucleo board STM32H7532ZIT6 – NUCLEO H753ZI as USB host in CDC mode. Can you please let me know whether this board supports CDC mode in USB host?

[NS.8]

Hi Walid,

It will be useful if you can provide USB host examples of STM32H7532ZIT6 – NUCLEO H753ZI so that I can verify the IOC/Configuration file?

Thanks in advance

[Walid ZRELLI]

Hello @NS.8​ ,

The examples provided under the STM32H7Cube firmware do not have the ioc file.

You can try to customize this example to your needs. This might help you.

BeST Regards,

Walid

[NS.8]

Hi Walid,

I suspect the configuration to be the main culprit in our setup. Is it possible to provide instructions for configuration so that we can verify the same ? WE disabled the VBUS as the module we connect to STM has a separate power

[NS.8]

Hi Walid,

What is the IDE used in this example project?

[Walid ZRELLI]

Hello @NS.8​ ,

All H7 examples are provided with the following IDEs:

• IAR (EWARM)
• Keil (MDK-ARM)
• System workbench (SW4STM32)

BeST Regards,

Walid