Can one reinitialize a function of USB composite device?

niepiekm — Fri, 09 Apr 2021 10:31:30 GMT

Hi,

I'm working on a UBS composite device, which consists of USB-CDC and USB-MTP functions. In one of the use cases, I'd like to be able to reinitialize MTP functionality without breaking USB-CDC communication. Using the following sequence works for MTP, but breaks CDC.

```
USB_DeviceStop();
USB_DeviceSetIsr(false);
MtpReinit();
USB_DeviceSetIsr(true);
USB_DeviceRun();

```

Regards,

Marek

Re: Can one reinitialize a function of USB composite device?

victorjimenez — Tue, 13 Apr 2021 00:40:52 GMT

Hello Marek,

With reinitialization, you mean to restart the process of enumeration and identification? If so, is not possible to reinitialize the USB-MTP without breaking the communication with the USB-CDC.

Regards,
Victor

topic Can one reinitialize a function of USB composite device? in MCUXpresso SDK

Can one reinitialize a function of USB composite device?

Re: Can one reinitialize a function of USB composite device?