Revert "Revert "DO NOT COMMIT: Work around PI clash with one of the mcr20a-rf-driver registers""

0xc0170 · Bartek Szatkowski · commit bbb9ef05911e · 2017-05-11T09:15:22.000+01:00
This reverts commit 3da7ef3.
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
 
   /**
