Test time difference in safe way

2016-04-10 15:55:12 -07:00
parent 562e281c73
commit 386140f361
9 changed files with 60 additions and 57 deletions
--- a/Marlin/macros.h
+++ b/Marlin/macros.h
@ -57,4 +57,7 @@

 #define PIN_EXISTS(PN) (defined(PN ##_PIN) && PN ##_PIN >= 0)

+#define PENDING(NOW,SOON) ((long)(NOW-(SOON))<0)
+#define ELAPSED(NOW,SOON) (!PENDING(NOW,SOON))
+
 #endif //__MACROS_H