#include <usb.h>

 #include <stdio.h>

 #define VERSION "0.1.0"

 #define VENDOR_ID 0x0925

 #define PRODUCT_ID 0x7001

 #define INTERFACE 0

 const static int reqIntLen=;

 const static int endpoint_Int_in=0x81; /* endpoint 0x81 address for IN */

 const static int endpoint_Int_out=0x01; /* endpoint 1 address for OUT */

 const static int timeout=; /* timeout in ms */

 void bad(const char *why) {

   fprintf(stderr,"Fatal error> %s\n",why);

   exit();

 }

 usb_dev_handle *find_lvr_hid();

 usb_dev_handle* setup_libusb_access() {

     usb_dev_handle *lvr_hid;

     int retval;

     char dname[] = {};

     usb_set_debug();

     usb_init();

     usb_find_busses();

     usb_find_devices();

     if(!(lvr_hid = find_lvr_hid())) {

     printf("Couldn't find the USB device, Exiting\n");

     return NULL;

   }

 #ifdef LINUX

   retval = usb_get_driver_np(lvr_hid, , dname, );

   if (!retval)

     usb_detach_kernel_driver_np(lvr_hid, );

 #endif

   retval=usb_set_configuration(lvr_hid, );

   if ( retval < ) {

     printf("Could not set configuration 1 : %d\n", retval);

     return NULL;

   }

   retval = retval=usb_claim_interface(lvr_hid, INTERFACE);

   if ( retval < ) {

     printf("Could not claim interface: %d\n", retval);

     return NULL;

   }

   return lvr_hid;

 }

 usb_dev_handle *find_lvr_hid()

 {

     struct usb_bus *bus;

   struct usb_device *dev;

   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 ) {

         usb_dev_handle *handle;

           printf("lvr_hid with Vendor Id: %x and Product Id: %x found.\n", VENDOR_ID, PRODUCT_ID);

         if (!(handle = usb_open(dev))) {

           printf("Could not open USB device\n");

           return NULL;

         }

         return handle;

       }

     }

   }

   return NULL;

 }

 /*

  void test_control_transfer(usb_dev_handle *dev)

  {

 //   usb_set_altinterface(dev, 0);

    usb_release_interface(dev, 0);

  }

 */

  void test_interrupt_transfer(usb_dev_handle *dev)

  {

    int r,i;

    char answer[reqIntLen];

    char question[reqIntLen];

    for (i=;i<reqIntLen; i++) question[i]=i;

    r = usb_interrupt_write(dev, endpoint_Int_out, question, reqIntLen, timeout);

    if( r <  )

    {

     perror("USB interrupt write"); bad("USB write failed");

    }

    r = usb_interrupt_read(dev, endpoint_Int_in, answer, reqIntLen, timeout);

    if( r != reqIntLen )

    {

     perror("USB interrupt read"); bad("USB read failed");

    }

    for (i=;i<reqIntLen; i++) printf("%i, %i, \n",question[i],answer[i]);

 //   usb_set_altinterface(dev, 0);

    usb_release_interface(dev, );

  }

 int main( int argc, char **argv)

 {

   usb_dev_handle *lvr_hid;

   if ((lvr_hid = setup_libusb_access()) == NULL) {

     exit(-);

   }

 //  test_control_transfer(lvr_hid); //not implemented yet

   test_interrupt_transfer(lvr_hid);

   usb_close(lvr_hid);

   return ;

 }