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diff --git a/digital/zigbit/bitcloud/stack/Components/HAL/avr/atmega1281/common/include/halFCPU.h b/digital/zigbit/bitcloud/stack/Components/HAL/avr/atmega1281/common/include/halFCPU.h
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+/**************************************************************************//**
+ \file halFCPU.h
+
+ \brief Declaration F_CPU for C code.
+
+ \author
+ Atmel Corporation: http://www.atmel.com \n
+ Support email: avr@atmel.com
+
+ Copyright (c) 2008-2011, Atmel Corporation. All rights reserved.
+ Licensed under Atmel's Limited License Agreement (BitCloudTM).
+
+ \internal
+ History:
+ 6/10/08 A. Khromykh - Created
+ ******************************************************************************/
+/******************************************************************************
+ * WARNING: CHANGING THIS FILE MAY AFFECT CORE FUNCTIONALITY OF THE STACK. *
+ * EXPERT USERS SHOULD PROCEED WITH CAUTION. *
+ ******************************************************************************/
+
+/******************************************************************************
+ Define(s) section
+******************************************************************************/
+/* Main clock of CPU in Hz. */
+#if defined(HAL_3d6864MHz)
+ #define F_CPU 3686400
+#elif defined(HAL_4MHz)
+ #define F_CPU 4000000
+#elif defined(HAL_7d3728MHz)
+ #define F_CPU 7372800
+#elif defined(HAL_8MHz)
+ #define F_CPU 8000000
+#endif
+
+// eof halFCPU.h