linux patch by Wil

[proxmark3-svn] / armsrc / util.h

diff --git a/armsrc/util.h b/armsrc/util.h
index 0af673cc14eacd6b1531eb01917e7cc2c32d3c97..34760ab1dedd4eb83e4df3c0ee60a26e44c3ad64 100644 (file)
--- a/armsrc/util.h
+++ b/armsrc/util.h
@@ -1,9 +1,21 @@
+//-----------------------------------------------------------------------------
+// Jonathan Westhues, Aug 2005
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Utility functions used in many places, not specific to any piece of code.
+//-----------------------------------------------------------------------------
+
 #ifndef __UTIL_H
 #define __UTIL_H
 
 #include <stddef.h>
 #include <stdint.h>
 
+#define BYTEx(x, n) (((x) >> (n * 8)) & 0xff )
+
 #define LED_RED 1
 #define LED_ORANGE 2
 #define LED_GREEN 4
@@ -25,4 +37,4 @@ int BUTTON_CLICKED(int ms);
 int BUTTON_HELD(int ms);
 void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information);
 
-#endif
\ No newline at end of file
+#endif