diff --git a/STM32/CM7/Core/Inc/general_state.h b/STM32/CM7/Core/Inc/general_state.h
new file mode 100644
index 0000000..218d5b6
--- /dev/null
+++ b/STM32/CM7/Core/Inc/general_state.h
@@ -0,0 +1,16 @@
+// Copyright (C) 2026 Pierre Barbier <pierrebarbier741@gmail.com>
+// Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+// SPDX-License-Identifier: GPL-3.0-or-late
+
+#include <ring_buffer.h>
+typedef enum {
+  SYNC_OK,
+  SYNC_PENDING,
+  SYNC_NOT_OK
+} sync_state;
+
+typedef struct {
+    sync_state sync;
+    ring_buffer_t crank_RB;
+    ring_buffer_t cam_RB;
+} global_state_t;