#include "Descriptors.h"
  
  /** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
   *  device characteristics, including the supported USB version, control endpoint size and the
   *  number of device configurations. The descriptor is read out by the USB host when the enumeration
   *  process begins.
   */

  const USB_Descriptor_Device_t PROGMEM PAD_DeviceDescriptor =

  {
  	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
  
  	.USBSpecification       = VERSION_BCD(1,1,0),
  	.Class                  = USB_CSCP_VendorSpecificClass,
  	.SubClass               = USB_CSCP_NoDeviceSubclass,
  	.Protocol               = USB_CSCP_NoDeviceProtocol,
  
  	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
  

  	.VendorID               = 0x2341,
  	.ProductID              = 0x0001,

  	.ReleaseNumber          = VERSION_BCD(2,0,0),
  
  	.ManufacturerStrIndex   = STRING_ID_Manufacturer,
  	.ProductStrIndex        = STRING_ID_Product,
  	.SerialNumStrIndex      = STRING_ID_Serial,
  
  	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
  };
  
  /** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
   *  of the device in one of its supported configurations, including information about any device interfaces
   *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
   *  a configuration so that the host may correctly communicate with the USB device.
   */

  const USB_Descriptor_Configuration_t PROGMEM PAD_ConfigurationDescriptor =

  {
  	.Config =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
  
  			.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),

  			.TotalInterfaces        = 2,

  
  			.ConfigurationNumber    = 1,
  			.ConfigurationStrIndex  = NO_DESCRIPTOR,
  
  			.ConfigAttributes       = USB_CONFIG_ATTR_RESERVED,
  
  			.MaxPowerConsumption    = USB_CONFIG_POWER_MA(500)
  		},
  
  	.PAD_Interface_LED =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
  
  			.InterfaceNumber        = INTERFACE_ID_LED,
  			.AlternateSetting       = 0,
  
  			.TotalEndpoints         = 2,
  
  			.Class                  = USB_CSCP_VendorSpecificClass,
  			.SubClass               = 0x00,
  			.Protocol               = 0x00,
  
  			.InterfaceStrIndex      = NO_DESCRIPTOR
  		},
  
  	.PAD_OUT_LED1 =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
  
  			.EndpointAddress        = PAD_OUT_EP_LED1,
  			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
  			.EndpointSize           = PAD_EPSIZE,
  			.PollingIntervalMS      = 0x05
  		},
  
  	.PAD_OUT_LED2 =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
  
  			.EndpointAddress        = PAD_OUT_EP_LED2,
  			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
  			.EndpointSize           = PAD_EPSIZE,
  			.PollingIntervalMS      = 0x05
  		},
  
  	.PAD_Interface_BUTTON =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
  
  			.InterfaceNumber        = INTERFACE_ID_BUTTON,
  			.AlternateSetting       = 0,
  
  			.TotalEndpoints         = 2,
  
  			.Class                  = USB_CSCP_VendorSpecificClass,
  			.SubClass               = 0x00,
  			.Protocol               = 0x00,
  
  			.InterfaceStrIndex      = NO_DESCRIPTOR
  		},
  
  	.PAD_IN_BUTTON1 =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
  
  			.EndpointAddress        = PAD_IN_EP_BUTTON1,

  			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_USAGE_DATA),

  			.EndpointSize           = PAD_EPSIZE,
  			.PollingIntervalMS      = 0x05
  		},
  
  	.PAD_IN_BUTTON2 =
  		{
  			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
  
  			.EndpointAddress        = PAD_IN_EP_BUTTON2,

  			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_USAGE_DATA),

  			.EndpointSize           = PAD_EPSIZE,
  			.PollingIntervalMS      = 0x05
  		},
  };
  
  /** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
   *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
   *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
   */

  const USB_Descriptor_String_t PROGMEM PAD_LanguageString =

  {
  	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
  
  	.UnicodeString          = {LANGUAGE_ID_ENG}
  };
  
  /** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
   *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
   *  Descriptor.
   */

  const USB_Descriptor_String_t PROGMEM PAD_ManufacturerString = USB_STRING_DESCRIPTOR(L"SISPM");

  
  /** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
   *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
   *  Descriptor.
   */

  const USB_Descriptor_String_t PROGMEM PAD_ProductString = USB_STRING_DESCRIPTOR(L"PAD");

  
  /** Serial number string. This is a Unicode string containing the device's unique serial number, expressed as a
   *  series of uppercase hexadecimal digits.
   */

  const USB_Descriptor_String_t PROGMEM PAD_SerialString = USB_STRING_DESCRIPTOR(L"00001");

  
  /** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
   *  documentation) by the application code so that the address and size of a requested descriptor can be given
   *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
   *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
   *  USB host.
   */
  uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
                                      const uint16_t wIndex,
                                      const void** const DescriptorAddress)
  {
  	const uint8_t  DescriptorType   = (wValue >> 8);
  	const uint8_t  DescriptorNumber = (wValue & 0xFF);
  
  	const void* Address = NULL;
  	uint16_t    Size    = NO_DESCRIPTOR;
  
  	switch (DescriptorType)
  	{
  		case DTYPE_Device:

  			Address = &PAD_DeviceDescriptor;

  			Size    = sizeof(USB_Descriptor_Device_t);
  			break;
  		case DTYPE_Configuration:

  			Address = &PAD_ConfigurationDescriptor;

  			Size    = sizeof(USB_Descriptor_Configuration_t);
  			break;
  		case DTYPE_String:
  			switch (DescriptorNumber)
  			{
  				case STRING_ID_Language:

  					Address = &PAD_LanguageString;
  					Size    = pgm_read_byte(&PAD_LanguageString.Header.Size);

  					break;
  				case STRING_ID_Manufacturer:

  					Address = &PAD_ManufacturerString;
  					Size    = pgm_read_byte(&PAD_ManufacturerString.Header.Size);

  					break;
  				case STRING_ID_Product:

  					Address = &PAD_ProductString;
  					Size    = pgm_read_byte(&PAD_ProductString.Header.Size);

  					break;
  				case STRING_ID_Serial:

  					Address = &PAD_SerialString;
  					Size    = pgm_read_byte(&PAD_SerialString.Header.Size);

  					break;
  			}
  
  			break;
  	}
  
  	*DescriptorAddress = Address;
  	return Size;
  }