USB_TYPE USBEndpoint::queueTransfer()
{
    HCD_HandleTypeDef *hhcd = (HCD_HandleTypeDef *)hced->hhcd;
    uint32_t *addr = &((uint32_t *)hhcd->pData)[hced->ch_num];
    uint32_t type = HAL_HCD_HC_GetType(hhcd, hced->ch_num);
    uint32_t max_size =  HAL_HCD_HC_GetMaxPacket(hhcd, hced->ch_num);
    /*  if a packet is queue on disconnected ; no solution for now */
    if (state == USB_TYPE_FREE)  {
        td_current->state =  USB_TYPE_FREE;
        return USB_TYPE_FREE;
    }
    ep_queue.get(0);
    MBED_ASSERT(*addr == 0);
    transfer_len =   td_current->size <= max_size ? td_current->size : max_size;
    buf_start = (uint8_t *)td_current->currBufPtr;

    //Now add this free TD at this end of the queue
    state = USB_TYPE_PROCESSING;
    /*  one request */
    td_current->nextTD = (hcTd *)0;
#if defined(MAX_NYET_RETRY)
    td_current->retry = 0;
#endif
    td_current->setup = setup;
    *addr = (uint32_t)td_current;
    /*  dir /setup is inverted for ST */
    /* token is useful only ctrl endpoint */
    /*  last parameter is ping ? */
    MBED_ASSERT(HAL_HCD_HC_SubmitRequest((HCD_HandleTypeDef *)hced->hhcd, hced->ch_num, dir - 1, type, !setup, (uint8_t *) td_current->currBufPtr, transfer_len, 0) == HAL_OK);
    HAL_HCD_EnableInt((HCD_HandleTypeDef *)hced->hhcd, hced->ch_num);

    return USB_TYPE_PROCESSING;
}

/**
 * @brief  USBH_LL_SubmitURB
 *         Submit a new URB to the low level driver.
 * @param  phost: Host handle
 * @param  pipe: Pipe index
 *         This parameter can be a value from 1 to 15
 * @param  direction : Channel number
 *          This parameter can be one of the these values:
 *           0 : Output
 *           1 : Input
 * @param  ep_type : Endpoint Type
 *          This parameter can be one of the these values:
 *            @arg EP_TYPE_CTRL: Control type
 *            @arg EP_TYPE_ISOC: Isochrounous type
 *            @arg EP_TYPE_BULK: Bulk type
 *            @arg EP_TYPE_INTR: Interrupt type
 * @param  token : Endpoint Type
 *          This parameter can be one of the these values:
 *            @arg 0: PID_SETUP
 *            @arg 1: PID_DATA
 * @param  pbuff : pointer to URB data
 * @param  length : Length of URB data
 * @param  do_ping : activate do ping protocol (for high speed only)
 *          This parameter can be one of the these values:
 *           0 : do ping inactive
 *           1 : do ping active
 * @retval Status
 */
USBH_StatusTypeDef USBH_LL_SubmitURB(USBH_HandleTypeDef *phost, uint8_t pipe,
                                     uint8_t direction, uint8_t ep_type,
                                     uint8_t token, uint8_t* pbuff,
                                     uint16_t length, uint8_t do_ping) {

  HAL_HCD_HC_SubmitRequest(phost->pData, pipe, direction, ep_type, token, pbuff,
                           length, do_ping);
  return USBH_OK;
}