Restructure the codebase across more files.

right/usb_descriptor_device.h

@@ -0,0 +1,44 @@
+#ifndef __USB_DEVICE_DESCRIPTOR_H__
+#define __USB_DEVICE_DESCRIPTOR_H__
+
+// Includes:
+
+    #include "usb_class_keyboard.h"
+    #include "usb_class_mouse.h"
+    #include "usb_class_generic_hid.h"
+
+// Macros:
+
+    #define USB_DEVICE_CLASS (0x00U)
+    #define USB_DEVICE_SUBCLASS (0x00U)
+    #define USB_DEVICE_PROTOCOL (0x00U)
+
+    #define USB_DEVICE_SPECIFICATION_VERSION (0x0200U)
+    #define USB_HID_VERSION (0x0100U)
+
+    #define USB_DEVICE_VENDOR_ID (0x15A2U)
+    #define USB_DEVICE_PRODUCT_ID (0x007EU)
+    #define USB_DEVICE_RELEASE_NUMBER (0x0101U)
+
+    #define USB_DEVICE_CONFIGURATION_COUNT (1U)
+    #define USB_REPORT_DESCRIPTOR_COUNT_PER_HID_DEVICE (1U)
+    #define USB_DEVICE_MAX_POWER (50U) // Expressed in 2mA units
+    #define USB_COMPOSITE_INTERFACE_COUNT (USB_KEYBOARD_INTERFACE_COUNT + \
+                                           USB_MOUSE_INTERFACE_COUNT + \
+                                           USB_GENERIC_HID_INTERFACE_COUNT)
+
+    #define USB_HID_COUNTRY_CODE_NOT_SUPPORTED (0x00U)
+    #define USB_INTERFACE_ALTERNATE_SETTING_NONE (0x00U)
+    #define USB_STRING_DESCRIPTOR_NONE             0U
+
+    // Descriptor lengths
+
+    #define USB_HID_DESCRIPTOR_LENGTH (9U)
+    #define USB_CONFIGURATION_DESCRIPTOR_TOTAL_LENGTH (91U)
+
+// Functions:
+
+    extern usb_status_t USB_DeviceGetDeviceDescriptor(
+        usb_device_handle handle, usb_device_get_device_descriptor_struct_t *deviceDescriptor);
+
+#endif