STM32F446 as USB Composite Device

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  • September 26, 2016 at 16:00 #9128
    buda
    Participant

     

    Hi,

    I am trying to create composite USB from STM32f446 (Nucleo board). I started from USB_CDC example, but got stuck when I had to add more configuration descriptors, because I don’t see how to register more than one class:

     

    USBD_Init(&USBD_Device, &COMPOSITE_Desc, 0);
    USBD_RegisterClass(&USBD_Device, &USBD_CDC);
    USBD_CDC_RegisterInterface(&USBD_Device, &USBD_CDC_SIT_V2_fops);
    USBD_Start(&USBD_Device);

    I would appreciate any advice on this matter. Thanks!

    September 27, 2016 at 20:13 #9139
    support
    Keymaster

    Hi,

    From a quick look it looks like the ST USB library only supports one device class at a time. We would recommend double-checking this on ST forums. If this is confirmed, please consider using third-party USB device stacks.

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