+int hmcfgusb_send_null_frame(struct hmcfgusb_dev *usbdev)
+{
+ int err;
+ int cnt;
+
+ err = libusb_interrupt_transfer(usbdev->usb_devh, EP_OUT, NULL, 0, &cnt, USB_TIMEOUT);
+ if (err) {
+ fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
+ return 0;
+ }
+
+ return 1;
+}
+