Reactor to one functional descriptor.

examples/device/dfu/src/tusb_config.h

@@ -76,14 +76,16 @@
 #define CFG_TUD_ENDPOINT0_SIZE    64
 #endif
 
-// DFU buffer size, must to be set to the largest buffer size used by an any given storage type
-#define CFG_TUD_DFU_TRANSFER_BUFFER_SIZE    4096
-
 //------------- CLASS -------------//
 
 #define CFG_TUD_DFU_RUNTIME 0
 #define CFG_TUD_DFU_MODE    1
 
+// Count of all alt settings, typically it's the partition count (Flash, EEPROM, etc.)
+#define CFG_TUD_DFU_ALT_COUNT               2
+// DFU buffer size, it has to be set to the buffer size used in TUD_DFU_MODE_DESCRIPTOR
+#define CFG_TUD_DFU_TRANSFER_BUFFER_SIZE    4096
+
 #ifdef __cplusplus
  }
 #endif