diff --git a/can/can_common.h b/can/can_common.h
index f97d2ce..4a11ac9 100644
--- a/can/can_common.h
+++ b/can/can_common.h
@@ -10,11 +10,18 @@
 // ECU output
 #define BENCH_TEST_RAW_ANALOG (BENCH_TEST_BASE_ADDRESS + 1)
 // ECU input
-#define BENCH_TEST_CONTROL (BENCH_TEST_BASE_ADDRESS + 2)
+#define BENCH_TEST_IO_CONTROL (BENCH_TEST_BASE_ADDRESS + 2)
 // ECU output
 #define BENCH_TEST_BOARD_STATUS (BENCH_TEST_BASE_ADDRESS + 3)
 // ECU output
 #define BENCH_TEST_BUTTON_COUNTERS (BENCH_TEST_BASE_ADDRESS + 4)
+// ECU output
+#define BENCH_TEST_IO_META_INFO (BENCH_TEST_BASE_ADDRESS + 5)
 
 
 // TEST_CONTROL_MAGIC_WORD
+
+#define CAN_BENCH_HEADER 0x66
+#define CAN_BENCH_GET_COUNT 0
+#define CAN_BENCH_GET_SET 1
+#define CAN_BENCH_GET_CLEAR 2