#include <stdio.h>

  #include <stdbool.h>
  #include <libusb-1.0/libusb.h>

  #define VENDOR_ID	0xfccf
  #define PRODUCT_ID	0xa001

  bool initUI(void)

  {

  	int				ret;

  	libusb_device_handle* screenHandle;
  
  	ret = libusb_init(NULL);
  	if(ret != 0)

  	{

  		printf("Error while initializing libusb, return : %d\n", ret);
  		return false;

  	}
  

  	struct			libusb_config_descriptor* dConfig = NULL;
  	libusb_device**	list = NULL;
  	ssize_t			cnt = libusb_get_device_list(NULL, &list);

  	struct libusb_device_descriptor dDevice;

  
  	printf("Starting lsusb things\n");
  
  	if(cnt < 0)

  	{

  		printf("Unable to get USB device list\n");
  		return false;

  	}
  

  	printf("%d devices detected\n", cnt);
  	printf("List of compatible devices detected\n");

  	for (int i = 0; i < cnt; i++)

  	{

  		libusb_device *device = list[i];
  		ret = libusb_get_device_descriptor(device, &dDevice);
  		if(VENDOR_ID == dDevice.idVendor && PRODUCT_ID == dDevice.idProduct)
  		{
  			printf("Bus %03d Device %03d: ID %04x:%04x\n",
  					libusb_get_bus_number(device),
  					libusb_get_device_address(device), dDevice.idVendor,
  					dDevice.idProduct);
  			ret = libusb_open(device, &screenHandle);
  			if(ret != 0)
  			{
  				printf("Unable to open this device, error %d\n", ret);
  				return false;
  			}
  		}

  	}

  	libusb_free_device_list(list, 1);

  	ret = libusb_get_config_descriptor(libusb_get_device(screenHandle), 0, &dConfig);
  	if(ret!=0)
  	{
  		printf("Descriptor for this device unavailable\n");
  		return false;
  	}
  	else
  	{
  		for(int j=0; j<dConfig->bNumInterfaces; j++)
  		{
  			if(libusb_kernel_driver_active(screenHandle, j) && (libusb_detach_kernel_driver(screenHandle, j) != 0))
  			{
  				printf("Unable to detach this device\n");
  				return false;
  			}
  		}
  		ret = libusb_set_configuration(screenHandle, dConfig->bConfigurationValue);
  		if(ret != 0)
  		{
  			printf("Configuration unavailable, error %d\n", ret);
  			return false;
  		}
  		for(int j=0; j<dConfig->bNumInterfaces; j++)
  			if(libusb_claim_interface(screenHandle, j) != 0)
  			{
  				printf("Device not claimed\n");
  				return false;
  			}
  			else
  				printf("Interface %d ready\n", j);
  	}
  	
  	libusb_free_config_descriptor(dConfig);

  	return true;
  }

  int main(void)
  {
  	if(!initUI())
  		printf("Unable to initialize the UI\n");

  	return 0;

  }