1 files changed, 5 insertions, 0 deletions
diff --git a/app/project.h b/app/project.h
index e2e10c7..8c729d8 100644
--- a/app/project.h
+++ b/app/project.h
@@ -17,6 +17,11 @@
 #include <stdio.h>
 #include <errno.h>
 
+#define   TICK_BASE 9000
+#define   TICK_DIV  12000
+#define   TICKS_TO_US(a)  (((a)*TICK_DIV*1000)/TICK_BASE)
+#define   MS_TO_TICKS(a) (((a)*1000)/TICKS_TO_US(1))
+
 #include "pins.h"
 
 #include "i2c.h"