+#\r
+# This will be an integer division of F_CLOCK below, as it is sourced by\r
+# F_CLOCK after it has run through any CPU prescalers. Note that this value\r
+# does not *change* the processor frequency - it should merely be updated to\r
+# reflect the processor speed set externally so that the code can use accurate\r
+# software delays.\r
+F_CPU = 16000000\r
+\r
+\r
+# Input clock frequency.\r
+# This will define a symbol, F_CLOCK, in all source code files equal to the \r
+# input clock frequency (before any prescaling is performed) in Hz. This value may\r
+# differ from F_CPU if prescaling is used on the latter, and is required as the\r
+# raw input clock is fed directly to the PLL sections of the AVR for high speed\r
+# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'\r
+# at the end, this will be done automatically to create a 32-bit value in your\r
+# source code.\r
+#\r
+# If no clock division is performed on the input clock inside the AVR (via the\r
+# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.\r
+F_CLOCK = $(F_CPU)\r
+\r
+\r
+# Starting byte address of the bootloader\r
+BOOT_START = 0xC000\r