Index: firmware/App/Common.h
===================================================================
diff -u -r620033425435de1fab63396301aa2404a49f8777 -rf8395d7271a1fbcb2e577ce48b9327b16d2b97e0
--- firmware/App/Common.h	(.../Common.h)	(revision 620033425435de1fab63396301aa2404a49f8777)
+++ firmware/App/Common.h	(.../Common.h)	(revision f8395d7271a1fbcb2e577ce48b9327b16d2b97e0)
@@ -107,7 +107,11 @@
 #define MAKE_LONG_OF_WORDS(h, l)        ((((U32)(h) << SHIFT_16_BITS_FOR_WORD_SHIFT) & MASK_OFF_LSW) | ((U32)(l) & MASK_OFF_MSW))
 #define GET_TOGGLE(v, l, h)             ((v) == (l) ? (h) : (l))
 #define BIT_BY_POS(p)                   (1U << (p))
+#define CIRCULAR_INCREASE(i, i_max)     (( (++i) == i_max) ? 0 : i )
+#define CIRCULAR_DECREASE(i, i_max)     (( ((S16) --i) == -1) ? i_max-1 : i )
 
+
+
 #define SET_ALARM_WITH_1_U32_DATA(a,d1)   { \
     ALARM_DATA_T dat1; \
     dat1.dataType = ALARM_DATA_TYPE_U32; \