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								SRC += matrix.c \
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									   i2c.c \
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									   split_util.c \
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									   serial.c
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								# MCU name
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								#MCU = at90usb1287
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								MCU = atmega32u4
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								# Processor frequency.
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								#     This will define a symbol, F_CPU, in all source code files equal to the
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								#     processor frequency in Hz. You can then use this symbol in your source code to
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								#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
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								#     automatically to create a 32-bit value in your source code.
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								#
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								#     This will be an integer division of F_USB below, as it is sourced by
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								#     F_USB after it has run through any CPU prescalers. Note that this value
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								#     does not *change* the processor frequency - it should merely be updated to
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								#     reflect the processor speed set externally so that the code can use accurate
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								#     software delays.
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								F_CPU = 16000000
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								#
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								# LUFA specific
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								#
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								# Target architecture (see library "Board Types" documentation).
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								ARCH = AVR8
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								# Input clock frequency.
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								#     This will define a symbol, F_USB, in all source code files equal to the
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								#     input clock frequency (before any prescaling is performed) in Hz. This value may
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								#     differ from F_CPU if prescaling is used on the latter, and is required as the
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								#     raw input clock is fed directly to the PLL sections of the AVR for high speed
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								#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
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								#     at the end, this will be done automatically to create a 32-bit value in your
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								#     source code.
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								#
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								#     If no clock division is performed on the input clock inside the AVR (via the
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								#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
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								F_USB = $(F_CPU)
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								# Bootloader
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								#     This definition is optional, and if your keyboard supports multiple bootloaders of
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								#     different sizes, comment this out, and the correct address will be loaded 
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								#     automatically (+60). See bootloader.mk for all options.
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								BOOTLOADER = caterina
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								# Interrupt driven control endpoint task(+60)
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								OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
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								# Build Options
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								#   change to "no" to disable the options, or define them in the Makefile in
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								#   the appropriate keymap folder that will get included automatically
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								#
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								BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
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								MOUSEKEY_ENABLE = no        # Mouse keys(+4700)
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								EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
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								CONSOLE_ENABLE = no         # Console for debug(+400)
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								COMMAND_ENABLE = yes        # Commands for debug and configuration
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								NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
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								BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
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								MIDI_ENABLE = no            # MIDI controls
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								AUDIO_ENABLE = no           # Audio output on port C6
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								UNICODE_ENABLE = no         # Unicode
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								BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
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								RGBLIGHT_ENABLE = yes        # Enable WS2812 RGB underlight. 
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								SUBPROJECT_rev1 = yes
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								USE_I2C = yes
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								# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
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								SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
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								CUSTOM_MATRIX = yes
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								DEFAULT_FOLDER = fourier/rev1
							 |