STM32F446 as USB Composite Device

[buda]

 

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!

[support]

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.

[Author]

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