diff --git a/firmware/type.h b/firmware/type.h
new file mode 100644
index 0000000..80996ec
--- /dev/null
+++ b/firmware/type.h
@@ -0,0 +1,19 @@
+/*  CTHN.de MiniLEDCube
+ *
+ *  Kai Lauterbach (klaute at web dot de)
+ *
+ *  Based on http://mosfetkiller.de/?s=miniledcube
+ *
+ *  License: General Public License (GPL v3)
+ *
+ */
+
+#include <avr/io.h>
+
+typedef struct
+{
+    uint32_t frame: 27;
+    uint32_t level:  2; // 00 01 10
+    uint32_t mode:   3;
+} cube_t;
+