qmk_firmware/keyboards/handwired/prkl30/feather/rules.mk

# MCU name
MCU = atmega32u4

# Processor frequency
F_CPU = 8000000

# Bootloader selection
#   Teensy       halfkay
#   Pro Micro    caterina
#   Atmel DFU    atmel-dfu
#   LUFA DFU     lufa-dfu
#   QMK DFU      qmk-dfu
#   ATmega32A    bootloadHID
#   ATmega328P   USBasp
BOOTLOADER = caterina

# Build Options
#   change yes to no to disable
#
BLUETOOTH = AdafruitBLE
BOOTMAGIC_ENABLE  = full     # Virtual DIP switch configuration
ENCODER_ENABLE = yes
MOUSEKEY_ENABLE  = no       # Mouse keys
EXTRAKEY_ENABLE  = no       # Audio control and System control
CONSOLE_ENABLE  = yes       # Console for debug
COMMAND_ENABLE  = yes       # Commands for debug and configuration
SLEEP_LED_ENABLE  = no      # Breathing sleep LED during USB suspend
NKRO_ENABLE  = yes          # USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
BACKLIGHT_ENABLE  = no
AUDIO_ENABLE  = no          # This can be enabled if a speaker is connected to the expansion port. Not compatible with RGBLIGHT below
RGBLIGHT_ENABLE  = no       # This can be enabled if a ws2812 strip is connected to the expansion port.