12  * The driver implements the interface between the USBD peripheral
40  * @brief nRF USBD peripheral states
64  * @brief USBD peripheral event types.
149  * @param state		New USBD peripheral state.
162  * @param evt_type	Type of event that has occurred from the USBD peripheral
224  * @brief USBD control structure
231  * @param attached	USBD Attached flag
232  * @param ready		USBD Ready flag set after pullup
233  * @param usb_work	USBD work item
374  * @brief Schedule USBD event processing.
384  * @brief Free previously allocated USBD event.
388  * @param Pointer to the USBD event structure.
396  * @brief Enqueue USBD event.
406  * @brief Get next enqueued USBD event if present.
429  * @brief Allocate USBD event.
442 		LOG_ERR("USBD event allocation failed!");  in usbd_evt_alloc()
453 			LOG_ERR("USBD event memory corrupted");  in usbd_evt_alloc()
745 	/* SETUP packets are handled by USBD hardware.  in usbd_work_process_setup()
801 		LOG_ERR("nRF USBD transfer error (OUT): 0x%02x", err);  in usbd_work_process_recvreq()
1048  * @brief nRFx USBD driver event handler function.
1113 			/* SetAddress is handled by USBD hardware.  in usbd_event_handler()
1164 		LOG_DBG("nRF USBD driver reinit failed. Code: %d", err);  in usbd_reinit()
1175  * refer to Nordic usbd specification.
1236 			LOG_DBG("USBD reset event");  in usbd_work_handler()
1257 				LOG_ERR("USBD event queue full!");  in usbd_work_handler()
1262 			LOG_ERR("Unknown USBD event: %"PRId16, ev->evt_type);  in usbd_work_handler()
1342 	LOG_DBG("USBD Reset");  in usb_dc_reset()
1366 	 * Nothing to do here. The USBD HW already takes care of initiating  in usb_dc_set_address()
1569 	/* Defer the endpoint enable if USBD is not ready yet. */  in usb_dc_ep_enable()
1652 	/* USBD driver does not allow scheduling multiple DMA transfers  in usb_dc_ep_write()
1703 		LOG_ERR("nRF USBD write error: %d", (uint32_t)err);  in usb_dc_ep_write()
1914 		LOG_DBG("nRF USBD driver init failed. Code: %d", (uint32_t)err);  in usb_init()