Revert _PI name change back to PI

bulislaw · bulislaw · commit adaa83f47cd1 · 2017-05-22T09:27:38.000+01:00
diff --git a/cmsis/arm_math.h b/cmsis/arm_math.h
@@ -361,8 +361,8 @@ extern "C"
 #define DELTA_Q31          (0x100)
 #define DELTA_Q15          0x5
 #define INDEX_MASK         0x0000003F
-#ifndef _PI
-  #define _PI               3.14159265358979f
+#ifndef PI
+  #define PI               3.14159265358979f
 #endif
 
   /**
