Extract USB_*_INTERFACE_COUNT macros to usb_interface_*.h files and make usb_device_config.h use them along with USB_*_ENDPOINT_COUNT macros.

right/src/usb_api.h

@@ -3,7 +3,6 @@
 
 // Includes:
 
-    #include "usb_device_config.h"
     #include "usb.h"
     #include "usb_device.h"
     #include "ksdk_usb/usb_device_class.h"

right/src/usb_composite_device.c

@@ -1,5 +1,4 @@
-#include "fsl_common.h"
-#include "usb_api.h"
+#include "usb_device_config.h"
 #include "usb_composite_device.h"
 #include "usb_descriptors/usb_descriptor_hid.h"
 #include "usb_descriptors/usb_descriptor_strings.h"

right/src/usb_composite_device.h

@@ -4,6 +4,8 @@
 // Includes:
 
     #include "usb_descriptors/usb_descriptor_configuration.h"
+    #include "usb_device_config.h"
+    #include "usb_device.h"
 
 // Macros:
 

right/src/usb_device_config.h

@@ -4,16 +4,21 @@
 // KHCI instance count
 #define USB_DEVICE_CONFIG_KHCI 1
 
+#include "usb_interfaces/usb_interface_basic_keyboard.h"
+#include "usb_interfaces/usb_interface_media_keyboard.h"
+#include "usb_interfaces/usb_interface_mouse.h"
+#include "usb_interfaces/usb_interface_generic_hid.h"
+
 // Device instance count, the sum of KHCI and EHCI instance counts
 #define USB_DEVICE_CONFIG_NUM 1
 
 // HID instance count
-#define USB_BASIC_KEYBOARD_INTERFACE_COUNT 1
-#define USB_MEDIA_KEYBOARD_INTERFACE_COUNT 1
-#define USB_MOUSE_INTERFACE_COUNT 1
-#define USB_GENERIC_HID_INTERFACE_COUNT 1
-#define USB_DEVICE_CONFIG_HID \
-    (USB_BASIC_KEYBOARD_INTERFACE_COUNT + USB_MEDIA_KEYBOARD_INTERFACE_COUNT + USB_MOUSE_INTERFACE_COUNT + USB_GENERIC_HID_INTERFACE_COUNT)
+#define USB_DEVICE_CONFIG_HID ( \
+    USB_BASIC_KEYBOARD_INTERFACE_COUNT + \
+    USB_MEDIA_KEYBOARD_INTERFACE_COUNT + \
+    USB_MOUSE_INTERFACE_COUNT + \
+    USB_GENERIC_HID_INTERFACE_COUNT \
+)
 
 // Whether the device is self-powered: 1 supported, 0 not supported
 #define USB_DEVICE_CONFIG_SELF_POWER 1
@@ -21,8 +26,17 @@
 // Whether device remote wakeup supported: 1 supported, 0 not supported
 #define USB_DEVICE_CONFIG_REMOTE_WAKEUP 0
 
+// The number of control endpoints, which is always 1
+#define USB_CONTROL_ENDPOINT_COUNT 1
+
 // How many endpoints are supported in the stack
-#define USB_DEVICE_CONFIG_ENDPOINTS 6
+#define USB_DEVICE_CONFIG_ENDPOINTS ( \
+    USB_CONTROL_ENDPOINT_COUNT + \
+    USB_BASIC_KEYBOARD_ENDPOINT_COUNT + \
+    USB_MEDIA_KEYBOARD_ENDPOINT_COUNT + \
+    USB_MOUSE_ENDPOINT_COUNT + \
+    USB_GENERIC_HID_ENDPOINT_COUNT \
+)
 
 // The maximum buffer length for the KHCI DMA workaround
 #define USB_DEVICE_CONFIG_KHCI_DMA_ALIGN_BUFFER_LENGTH 64

right/src/usb_interfaces/usb_interface_basic_keyboard.h

@@ -10,6 +10,7 @@
 // Macros:
 
     #define USB_BASIC_KEYBOARD_INTERFACE_INDEX 1
+    #define USB_BASIC_KEYBOARD_INTERFACE_COUNT 1
 
     #define USB_BASIC_KEYBOARD_ENDPOINT_INDEX 3
     #define USB_BASIC_KEYBOARD_ENDPOINT_COUNT 1

right/src/usb_interfaces/usb_interface_generic_hid.h

@@ -10,6 +10,7 @@
 // Macros:
 
     #define USB_GENERIC_HID_INTERFACE_INDEX 0
+    #define USB_GENERIC_HID_INTERFACE_COUNT 1
 
     #define USB_GENERIC_HID_ENDPOINT_IN_INDEX 1
     #define USB_GENERIC_HID_ENDPOINT_OUT_INDEX 2

right/src/usb_interfaces/usb_interface_media_keyboard.h

@@ -10,6 +10,7 @@
 // Macros:
 
     #define USB_MEDIA_KEYBOARD_INTERFACE_INDEX 3
+    #define USB_MEDIA_KEYBOARD_INTERFACE_COUNT 1
 
     #define USB_MEDIA_KEYBOARD_ENDPOINT_INDEX 5
     #define USB_MEDIA_KEYBOARD_ENDPOINT_COUNT 1

right/src/usb_interfaces/usb_interface_mouse.h

@@ -9,6 +9,7 @@
 // Macros:
 
     #define USB_MOUSE_INTERFACE_INDEX 2
+    #define USB_MOUSE_INTERFACE_COUNT 1
 
     #define USB_MOUSE_ENDPOINT_INDEX 4
     #define USB_MOUSE_ENDPOINT_COUNT 1