Index: firmware/App/Common.h
===================================================================
diff -u -rba60692a9ecaf59cb5cb8490f4276917f43bcd01 -r3a0dc476f0f42bb7ebadc7d6109a0b5b6581cce4
--- firmware/App/Common.h	(.../Common.h)	(revision ba60692a9ecaf59cb5cb8490f4276917f43bcd01)
+++ firmware/App/Common.h	(.../Common.h)	(revision 3a0dc476f0f42bb7ebadc7d6109a0b5b6581cce4)
@@ -8,14 +8,16 @@
 #ifndef __COMMON_H__
 #define __COMMON_H__
 
-#define NUM_OF_FW_STACKS            3
+#define NUM_OF_FW_STACKS                      3
 #define FIRMWARE_START_ADDRESS                0x00010000
 #define FIRMWARE_CRC_TABLE_ADDRESS            0x10020             ///< The starting address of CRC table for firmware image.
 #define SW_UPDATE_FLASH_BUFFER_SIZE           128
 #define MASK_OFF_MSB                          0x00FF      ///< Bits to mask off the most significant byte of a 2-byte word
 #define MASK_OFF_LSB                          0xFF00      ///< Bits to mask off the least significant byte of a 2-byte word
 #define SHIFT_8_BITS_FOR_BYTE_SHIFT           8           ///< Number of bits to shift in order to shift a byte
+#define MASK_OFF_NIBBLE_MSB                   0x0F        ///< Bits to mask off the most significant nibble of a byte
 
+
 #define GET_LSB_OF_WORD(w)              ((U08)((w) & MASK_OFF_MSB))                             ///< Macro returns the least signficant byte of a 2-byte word
 #define GET_MSB_OF_WORD(w)              ((U08)(((w) >> SHIFT_8_BITS_FOR_BYTE_SHIFT) & MASK_OFF_MSB))  ///< Macro returns the most signficant byte of a 2-byte word
 #define MAKE_WORD_OF_BYTES(h, l)        ((((U16)(h) << SHIFT_8_BITS_FOR_BYTE_SHIFT) & MASK_OFF_LSB) | ((U16)(l) & MASK_OFF_MSB))    ///< Macro merges two bytes into a 2-byte word