add QMK DFU make option to gherkin, and bootloader replacement instructions (#3253)

* add QMK DFU make option, bootloader replacement instructions

in wanleg readme: update flashing instructions, add bootloader replacement instructions (replace default Caterina with QMK DFU).

add make option for QMK DFU

* suggested revisions made

* formatting changes

1 files changed, 6 insertions, 62 deletions

diff --git a/keyboards/gherkin/keymaps/wanleg/rules.mk b/keyboards/gherkin/keymaps/wanleg/rules.mk
index 06e66c16e..7f2ff3327 100644
--- a/keyboards/gherkin/keymaps/wanleg/rules.mk
+++ b/keyboards/gherkin/keymaps/wanleg/rules.mk
@@ -1,63 +1,7 @@
-# MCU name
-MCU = atmega32u4
+TAP_DANCE_ENABLE = yes		# Enable Tap Dance (comment if not being implemented)
 
-# 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 = 16000000
-
-#
-# 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 = $(F_CPU)
-
-# Interrupt driven control endpoint task(+60)
-OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
-
-
-# Boot Section Size in *bytes*
-OPT_DEFS += -DBOOTLOADER_SIZE=4096
-
-# Bootloader
-#     This definition is optional, and if your keyboard supports multiple bootloaders of
-#     different sizes, comment this out, and the correct address will be loaded 
-#     automatically (+60). See bootloader.mk for all options.
-BOOTLOADER = caterina
-
-
-# Build Options
-#   comment out to disable the options.
-#
-BOOTMAGIC_ENABLE = yes	# Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = yes	# Mouse keys(+4700)
-EXTRAKEY_ENABLE = yes	# Audio control and System control(+450)
-CONSOLE_ENABLE = no	# Console for debug(+400)
-COMMAND_ENABLE = no    # Commands for debug and configuration
-SLEEP_LED_ENABLE = no  # Breathing sleep LED during USB suspend
-NKRO_ENABLE = yes		# USB Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = yes  # Enable keyboard backlight functionality
-AUDIO_ENABLE = no
-RGBLIGHT_ENABLE = no
-TAP_DANCE_ENABLE = yes		# Enable Tap Dance (comment if not being implemented)
\ No newline at end of file
+#If ProMicro has QMK DFU bootloader instead of Caterina,
+#run "make <keyboard>:<keymap> dfu=qmk" when compiling to ensure it is flagged properly after being flashed
+ifeq ($(strip $(dfu)), qmk)
+    BOOTLOADER = qmk-dfu
+endif
\ No newline at end of file