#include <stdio.h>
#include <usb.h>

#define PRODUCT_ID 0x0033
#define VENDOR_ID  0x04d8
// serial = PIC18F2550

main()
{
  struct usb_bus *bus;
  struct usb_device *dev;
  usb_dev_handle *dh;

  usb_init();
  usb_find_busses();
  usb_find_devices();

  for (bus = usb_get_busses(); bus; bus = bus->next) {
	for (dev = bus->devices; dev; dev = dev->next) {
	  if (dev->descriptor.idVendor == VENDOR_ID &&
		  dev->descriptor.idProduct == PRODUCT_ID) {
	    goto device_found;
	  }
	}
  }
  /* デバイスが見つからなかった場合 */
  fprintf(stderr, "Device not found.\n");
  exit(1);
  /* デバイスが見つかった場合 */
 device_found:
  printf("Device Found!!\n"); /* 確認用*/
}