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EniRot99
Associate III
October 28, 2023
Solved

How can I use multiple USB device classes with STM32L4

  • October 28, 2023
  • 2 replies
  • 3064 views

Hello together,
does anyone know how I can implement multiple USB device classes on a STM32?
I want to use the CDC so a VCP and the DFU class so I can communicate with my chip and drive an update if needed. I am working with a STM32L452RE.

It must be possible, it is the standard functionality of every ST-Link V2/V3 debugger that exists.

In the CubeMx you can not set this, is that documented somewhere? Unfortunately I haven't found anything yet.

Thanks for your assistance!

Best answer by Pavel A.

The keyword is "composite device". Search for it and you'll find enough information.

 

2 replies

Pavel A.
Pavel A.Answer
Super User
October 28, 2023

The keyword is "composite device". Search for it and you'll find enough information.

 

    E
    EniRot99Author
    Associate III
    October 30, 2023

    This was the right key word. Found this which looks nice: I-CUBE-USBD-Composite 

      MKing
      MKing
      Associate
      January 19, 2024

      Hi,

      it is a shame that CubeMX does not support a combination of several device classes. After one day of searching examples i found a "software pack" for CubeMX:

      alambe94/I-CUBE-USBD-Composite: Create STM32 USB Composite devices with ease. (github.com)

      ST, please support this project and promote it, so we all can save lifetime!

       

      MKing_0-1705645332984.png

       

      I use:

      CubeMX 6.10.0

      CubeIDE 1.14.0

      Processor: STM32F407VGT

        Shirley.Ye
        Shirley.Ye
        ST Employee
        October 30, 2023

        you can download the L4 cube firmware in st.com and there is USB middleware in stm32cube_fw_l4\Middlewares dir.

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