rockbox turn on usb during recoring

            case SYS_USB_CONNECTED:
                if ((audio_stat & AUDIO_STATUS_RECORD)) {
                    // stop the recording to do usb
                    rec_command(RECORDING_CMD_STOP);
                    FOR_NB_SCREENS(i)
                       screens[i].set_viewport(NULL);
                    next_screen = GO_TO_RECSCREEN;
                    recording_start_automatic = true;

                    done = true;
                    rec_status |= RCSTAT_BEEN_IN_USB_MODE;
#ifdef HAVE_FMRADIO_REC
                    radio_status = FMRADIO_OFF;
#endif
                    // wait a bit
                    sleep(20);
                    while(!(audio_stat & AUDIO_STATUS_RECORD)) {
                         sleep(20);
                    }

                    default_event_handler(SYS_USB_CONNECTED);
                    usb_acknowledge(SYS_USB_CONNECTED_ACK);



                }


                /* Only accept USB connection when not recording */
                else if(!(audio_stat & AUDIO_STATUS_RECORD))
                {
                    FOR_NB_SCREENS(i)
                        screens[i].set_viewport(NULL);
                    next_screen = GO_TO_RECSCREEN;
                    recording_start_automatic = true;
                    default_event_handler(SYS_USB_CONNECTED);
                    done = true;
                    rec_status |= RCSTAT_BEEN_IN_USB_MODE;
#ifdef HAVE_FMRADIO_REC
                    radio_status = FMRADIO_OFF;
#endif
                }
                break;