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+# MCU name
+MCU ?= atmega32u4
+
+
+# Processor frequency.
+# This will define a symbol, F_CPU, in all source code files equal to the
+# processor frequency in Hz. You can then use this symbol in your source code to
+# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+# automatically to create a 32-bit value in your source code.
+#
+# This will be an integer division of F_USB below, as it is sourced by
+# F_USB after it has run through any CPU prescalers. Note that this value
+# does not *change* the processor frequency - it should merely be updated to
+# reflect the processor speed set externally so that the code can use accurate
+# software delays.
+F_CPU ?= 8000000
+
+
+#
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH ?= AVR8
+
+# Input clock frequency.
+# This will define a symbol, F_USB, in all source code files equal to the
+# input clock frequency (before any prescaling is performed) in Hz. This value may
+# differ from F_CPU if prescaling is used on the latter, and is required as the
+# raw input clock is fed directly to the PLL sections of the AVR for high speed
+# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+# at the end, this will be done automatically to create a 32-bit value in your
+# source code.
+#
+# If no clock division is performed on the input clock inside the AVR (via the
+# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB ?= $(F_CPU)
+
+# Interrupt driven control endpoint task
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+
+# Boot Section Size in *bytes*
+# Teensy halfKay 512
+# Teensy++ halfKay 1024
+# Atmel DFU loader 4096
+# LUFA bootloader 4096
+# USBaspLoader 2048
+OPT_DEFS += -DBOOTLOADER_SIZE=4096
+
+
+# Build Options
+# comment out to disable the options.
+#
+# BOOTMAGIC_ENABLE ?= yes # Virtual DIP switch configuration(+1000)
+# MOUSEKEY_ENABLE ?= yes # Mouse keys(+4700)
+EXTRAKEY_ENABLE ?= yes # Audio control and System control(+450)
+# CONSOLE_ENABLE ?= yes # Console for debug(+400)
+# COMMAND_ENABLE ?= yes # Commands for debug and configuration
+# SLEEP_LED_ENABLE ?= yes # Breathing sleep LED during USB suspend
+# NKRO_ENABLE ?= yes # USB Nkey Rollover - not yet supported in LUFA
+# BACKLIGHT_ENABLE ?= yes
+
+
+CUSTOM_MATRIX = yes
+SRC = custom_matrix.cpp
+include $(TMK_DIR)/protocol/usb_hid.mk