diff --git a/global.h b/global.h
index 9a6d4d5..40c22cc 100644
--- a/global.h
+++ b/global.h
@@ -9,6 +9,11 @@
 /** enable debugging functionalities */
 #define DEBUG true
 
+/** Data Synchronization Barrier, ensure all data is written */
+#define __DSB() __asm__("dsb")
+/** Instruction Synchronization Barrier, ensure all instruction are run */
+#define __ISB() __asm__("isb")
+
 /** get the length of an array */
 #define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
 /** concatenate 2 arguments */