UDC_EP_HALTED
(stat_flg & UDC_EP_HALTED) ? "HALT " : "",
#define UDC_FIFO_UNWRITABLE (UDC_EP_HALTED | UDC_FIFO_FULL)
#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
if (ep_stat & UDC_EP_HALTED)