diff --git a/demos/demos.mk b/demos/demos.mk
deleted file mode 100644
index 5538127ab..000000000
--- a/demos/demos.mk
+++ /dev/null
@@ -1,73 +0,0 @@
-#Compiler Flags = Include Path + Macros Defines
-CFLAGS = $(MACROS_DEF) $(INC_PATH)
-
-#Macros is Board and Mcu
-MACROS_DEF += -DBOARD=$(board) -DMCU=MCU_$(MCU)
-
-#MCU currently supported
-mcu_support = 13UXX 11UXX
-
-################ Board and MCU determination ################
-#all configuration build's name must be named after the macro BOARD_NAME defined in the tinyusb/demos/boards/board.h
-buildname =  $(shell echo $(notdir $(build_dir)) | tr a-z A-Z)
-board = $(buildname)
-mcu = $(shell echo $(MCU) | tr A-Z a-z)
-
-$(warning board $(board) )
-
-ifeq (,$(findstring BOARD_,$(board)))
- $(error build's name must be name exactly the same as the macro BOARD_NAME defined in the tinyusb/demos/boards/board.h)
-endif
-
-MCU := $(strip $(foreach supported_chip, $(mcu_support), $(findstring $(supported_chip),$(board))))
-
-ifeq (,$(MCU))
-$(error build name must contain one of supported mcu: $(mcu_support))
-endif
-
-MCU := LPC$(MCU)
-
-$(warning MCU $(MCU) $(mcu))
-
-################ Build Manipulate ################
-#Remove all other mcu in demos/bsp and keep only needed one
-OBJS := $(filter-out ./bsp/lpc%,$(OBJS)) $(filter ./bsp/$(mcu)%,$(OBJS))
-
-#remove all other toolchain startup script
-toolchain = xpresso
-OBJS := $(filter-out ./bsp/$(mcu)/startup%,$(OBJS)) $(filter ./bsp/$(mcu)/startup_$(toolchain)%,$(OBJS))
-
-#CMSIS include path & lib path
-cmsis_proj = $(shell cd $(workspace_dir); ls | grep -i "CMSIS.*$(MCU)")
-rel_include +=  $(cmsis_proj)/inc
-rel_include +=  demos/bsp/boards
-rel_include +=  demos/bsp/$(mcu)/inc
-INC_PATH = $(addprefix  -I"$(workspace_dir)/, $(addsuffix ",$(rel_include)))
-
-LIBS += -l$(cmsis_proj) -L"$(workspace_dir)/$(cmsis_proj)/Debug"
-#$(error $(OBJS))
-
-#generate makefiles.def containing MCU define for tinyusb lib
-#tinyusb_CFLAGS = -DMCU=MCU_$(MCU) -I\"$(workspace_dir)/$(cmsis_proj)/inc\"
-#$(shell echo CFLAGS = $(tinyusb_CFLAGS) > $(workspace_dir)/tinyusb/makefile.defs) 
-#$(shell echo $$\(warning MCU = MCU_$(MCU)\) >> $(workspace_dir)/tinyusb/makefile.defs)
-
-
-
-
-#startup_objs := $(subst $(workspace_dir)/demos,.,$(shell find $(workspace_dir)/demos/ -type f))
-#startup_objs := $(patsubst %.c,%.o,$(startup_objs))
-#startup_objs := $(patsubst %.s,%.o,$(startup_objs))
-#$(error $(startup_objs))
-#OBJS := $(filter-out $(startup_objs),$(OBJS))
-
-# add required startup script $(mcu) serves as sub folders inside startup
-#startup_lpxpresso = $(mcu).*cr_startup
-#startup_require += $(strip $(foreach entry,$(startup_objs), $(shell echo $(entry) | grep -i $(startup_lpxpresso))))
-#OBJS += $(startup_require)
-#$(warning $(startup_require))
-
-#Remove Other MCU source, start 
-#$(warning $(CFLAGS) )
-#$(warning $(S_SRCS) )
-