# UNICODE_ENABLE = yes # Unicode
# BLUETOOTH_ENABLE = yes # Enable Bluetooth with the Adafruit EZ-Key HID
-debug-on: EXTRAFLAGS += -DDEBUG -DDEBUG_ACTION
-debug-on: all
-debug-off: EXTRAFLAGS += -DNO_DEBUG -DNO_PRINT
-debug-off: OPT_DEFS := $(filter-out -DCONSOLE_ENABLE,$(OPT_DEFS))
-debug-off: all
+# HHKB_RN42_ENABLE = yes # Enable support for hasu's BT alt controller -- code borrowed from tmk source tree.
+
+# Either uncomment the HHKB_RN42_ENABLE line above, or run make enabling the
+# feature. Be sure to clean any existing build before trying to enable rn42
+# support. For example:
+#
+# make hhkb-keymap-clean
+# make hhkb-keymap-dfu HHKB_RN42_ENABLE=yes
+
+ifeq ($(strip $(HHKB_RN42_ENABLE)), yes)
+
+OPT_DEFS += -DHHKB_RN42_ENABLE
+
+# Support for the RN42 Bluetooth module. This is the BT module in Hasu's BT
+# HHKB Alt controller.
+RN42_DIR = rn42
+
+SRC += serial_uart.c \
+ rn42/suart.S \
+ rn42/rn42.c \
+ rn42/rn42_task.c \
+ rn42/battery.c \
+ rn42/main.c
+
+VPATH += $(RN42_DIR)
+
+endif
+
+
+# debug-on: EXTRAFLAGS += -DDEBUG -DDEBUG_ACTION
+# debug-on: all
+
+# debug-off: EXTRAFLAGS += -DNO_DEBUG -DNO_PRINT
+# debug-off: OPT_DEFS := $(filter-out -DCONSOLE_ENABLE,$(OPT_DEFS))
+# debug-off: all