};
int hmcfgusb_send(struct hmcfgusb_dev *usbdev, unsigned char* send_data, int len, int done);
+int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev);
struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data);
int hmcfgusb_add_pfd(struct hmcfgusb_dev *dev, int fd, short events);
int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout);