micropython/stm/lib/usbd_conf.h

#ifndef __USBD_CONF__H__
#define __USBD_CONF__H__

#define USBD_CFG_MAX_NUM                1 // TODO need more than 1?
#define USBD_ITF_MAX_NUM                1 // TODO need more than 1?

#endif //__USBD_CONF__H__