diff --git a/Makefile b/Makefile
deleted file mode 100644
index 0bac133..0000000
--- a/Makefile
+++ /dev/null
@@ -1,227 +0,0 @@
-## This library is free software: you can redistribute it and/or modify
-## it under the terms of the GNU Lesser General Public License as published by
-## the Free Software Foundation, either version 3 of the License, or
-## (at your option) any later version.
-##
-## This library is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU Lesser General Public License for more details.
-##
-## You should have received a copy of the GNU Lesser General Public License
-## along with this library.  If not, see <http://www.gnu.org/licenses/>.
-##
-
-## the make file provide rule to compile and flash firmware for STM32F1 micro-controllers
-## it uses libopencm3
-
-# be silent per default, but 'make V=1' will show all compiler calls.
-ifneq ($(V),1)
-Q := @
-NULL := 1> /dev/null 2> /dev/null
-endif
-
-# main names (without extension, for input source file and output binary)
-APPLICATION = application
-BOOTLOADER = bootloader
-FIRMWARE = $(APPLICATION) $(BOOTLOADER)
-
-# which development board is used
-# supported are: SYSTEM_BOARD, MAPLE_MINI, BLUE_PILL, CORE_BOARD
-BOARD = CORE_BOARD
-
-# opencm3 libraries
-OPENCM3_DIR := libopencm3
-OPENCM3_INC = $(OPENCM3_DIR)/include
-OPENCM3_LIB = $(OPENCM3_DIR)/lib
-
-# library for the STM32F1 (provided by opencm3)
-STM32F1_LIB = opencm3_stm32f1
-# libraries with source code used (also to be compiled)
-SRCLIBS = . lib
-# source files (this will be populated using includes based DEPENDENCIES)
-CSRC = 
-# headers (unique, and if existing) corresponding to source files
-CHDR = $(sort $(patsubst %.c,%.h,$(wildcard $(CSRC))))
-# objects (unique, and if existing) compiled from source files
-OBJ = $(sort $(patsubst %.c,%.o,$(wildcard $(CSRC))))
-# figure out based on the main sources files which library files are used
-DEPENDENCIES = $(patsubst %,%.inc,$(FIRMWARE))
-# populates CSRC based on the library files used
--include $(DEPENDENCIES)
-
-# executables for linking, compiling, debugging, ...
-# use clang to compile, GNU ARM toolchain for the rest
-PREFIX ?= arm-none-eabi
-# use ELLCC as compile
-CC := clang -target $(PREFIX)
-LD := $(PREFIX)-ld
-LD := $(PREFIX)-ld
-AR := $(PREFIX)-ar
-AS := $(PREFIX)-as
-OBJCOPY := $(PREFIX)-objcopy
-OBJDUMP := $(PREFIX)-objdump
-GDB := $(PREFIX)-gdb
-
-# device micro-controller and board
-DEFS += -DSTM32F1 -D$(BOARD)
-
-# C flags
-# optimize for size
-CFLAGS += -Os
-# add debug symbols (remove for smaller release)
-CFLAGS += -ggdb
-# use C99 (supported by most an sufficient)
-CFLAGS += -std=c99
-# have strict warning (for better code)
-CFLAGS += -Wpedantic -Wall -Werror -Wundef -Wextra -Wshadow -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -Wstrict-overflow=5
-# add options for better code optimization
-CFLAGS += -fno-common -ffunction-sections -fdata-sections
-# use variable size enum (clang doesn't but opencm3, and gcc do)
-CFLAGS += -fshort-enums
-# use no variable size enum (ELLCC/musl does not)
-#CFLAGS += -fno-short-enums
-# don't use system main definition (the starting point)
-CFLAGS += -ffreestanding
-# don't use the standard library (only if you provide an alternative libc library)
-#CFLAGS += -nostdlib -nostdinc
-# include own libraries 
-CFLAGS += $(foreach lib,$(SRCLIBS),-I $(lib))
-# include opencm3 libraries
-CFLAGS += -I $(OPENCM3_INC)
-# add defines for micro-controller and board
-CFLAGS += $(DEFS)
-
-# linker flags
-# build static binary (no shared libraries on the micro-controller)
-LDFLAGS += -static
-# don's include the system start files
-LDFLAGS += -nostartfiles
-# only keep used sections
-LDFLAGS += --gc-sections
-# don't use system libraries (only if you provide an alternative libc library)
-#LDFLAGS += -nostdlib -nostdinc
-# add standard libraries (for libc, libm, libnosys, libgcc)
-LDFLAGS += --library-path /usr/arm-none-eabi/lib/armv7-m/
-LDFLAGS += --library-path /usr/lib/gcc/arm-none-eabi/*/armv7-m/
-# opencm3 libraries
-LDFLAGS += --library-path $(OPENCM3_LIB)
-# used libraries (gcc provides the ARM ABI)
-LDLIBS += --library $(STM32F1_LIB) --library c --library m --library nosys --library gcc
-
-# target micro-controller information (ARM Cortex-M3 supports thumb and thumb2, but does not include a floating point unit)
-ARCH_FLAGS = -mthumb -mcpu=cortex-m3 -msoft-float
-
-# SWD adapter used
-# supported are : st-link v2 (STLINKV2), black magic probe (BMP)
-SWD_ADAPTER ?= BMP
-ifeq ($(SWD_ADAPTER),STLINKV2)
-# OpenOCD configuration
-OOCD ?= openocd
-OOCD_INTERFACE ?= stlink-v2
-OOCD_TARGET ?= stm32f1x
-else ifeq ($(SWD_ADAPTER),BMP)
-# the black magic probe has a SWD controller built in
-BMP_PORT ?= /dev/ttyACM0
-endif
-
-# compile target rules
-all: elf hex bin
-
-elf: $(patsubst %,%.elf,$(FIRMWARE))
-bin: $(patsubst %,%.bin,$(FIRMWARE))
-hex: $(patsubst %,%.hex,$(FIRMWARE))
-
-%.hex: %.elf
-	$(Q)$(OBJCOPY) --strip-all --strip-debug --output-target ihex $(<) $(@)
-
-%.bin: %.elf
-	$(Q)$(OBJCOPY) --strip-all --strip-debug --output-target binary $(<) $(@)
-
-%.map %.list: %.elf
-	$(Q)$(OBJDUMP) -S $(<) > $(@)
-
-%.elf: %.o %.ld $(OBJ) $(OPENCM3_LIB)/lib$(STM32F1_LIB).a
-	$(info linking $(@))
-	$(Q)$(LD) $(LDFLAGS) --script $(*).ld $(<) $(OBJ) $(LDLIBS) -o $(@)
-	$(Q)size $(@)
-
-%.o: %.c $(CHDR) $(OPENCM3_LIB)/lib$(STM32F1_LIB).a
-	$(info compiling $(@))
-	$(Q)$(CC) $(CFLAGS) $(ARCH_FLAGS) -o $(@) -c $(<)
-
-# find out which library source files also need to be compiled and linked, based on its dependencies
-%.inc: %.c $(OPENCM3_LIB)/lib$(STM32F1_LIB).a
-	$(Q)echo "" > $(@)
-	$(Q)for dependency in $(shell $(CC) $(CFLAGS) $(ARCH_FLAGS) -MM -c $(<)); do \
-		if [ -f "$${dependency}" ]; then \
-			for lib in $(SRCLIBS); do \
-				if [ `dirname "$${dependency}"` = "$${lib}" ]; then \
-					if [ -f `echo "$${dependency}" | sed -e 's|\(.*\)\.h$$|\1.c|'` ]; then \
-						echo "$${dependency}" | sed -e 's|\(.*\)\.h$$|CSRC += \1.c\n-include \1.inc|g' -e 's|.*${*}.*||g' >> $(@); \
-					fi; \
-				fi; \
-			done; \
-		fi; \
-	done
-
-# get libopencm3
-$(OPENCM3_DIR)/Makefile:
-	$(info checking out libopencm3 submodule)
-	$(Q)git submodule init
-	$(Q)git submodule update
-
-# compile libopencm3
-$(OPENCM3_LIB)/lib$(STM32F1_LIB).a: $(OPENCM3_DIR)/Makefile
-	$(info compiling libopencm3 submodule)
-	$(Q)$(MAKE) --directory $(OPENCM3_DIR)
-
-# doxygen documentation
-doc: Doxyfile README.md $(patsubst %,%.c,$(FIRMWARE)) $(CSRC) $(CHDR)
-	$(Q)doxygen $(<)
-
-clean:
-	$(Q)$(RM) $(BOOTLOADER).elf $(BOOTLOADER).bin $(BOOTLOADER).hex $(APPLICATION).elf $(APPLICATION).bin $(APPLICATION).hex $(OBJ) $(DEPENDENCIES) *.inc lib/*.inc
-
-# flash application using DFU
-flash: $(APPLICATION).bin
-	$(Q)dfu-util -d c440:0d00 -D $(<)
-
-# flash bootloader using SWD
-flash_bootloader: $(BOOTLOADER).hex
-	$(info flashing $(<) using SWD)
-ifeq ($(SWD_ADAPTER),STLINKV2)
-	$(Q)$(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command "init" --command "reset init" --command "flash write_image erase $(<)" --command "reset" --command "shutdown" $(NULL)
-else ifeq ($(SWD_ADAPTER),BMP)
-	$(Q)$(GDB) --eval-command="target extended-remote $(BMP_PORT)" --eval-command="set confirm off" --eval-command="monitor swdp_scan" --eval-command="attach 1" --eval-command="load" --eval-command="detach" --eval-command="quit" $(<)
-endif
-
-# flash application using SWD
-flash_application: $(APPLICATION).hex
-	$(info flashing $(<) using SWD)
-ifeq ($(SWD_ADAPTER),STLINKV2)
-	$(Q)$(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command "init" --command "reset init" --command "flash write_image erase $(<)" --command "reset" --command "shutdown" $(NULL)
-else ifeq ($(SWD_ADAPTER),BMP)
-	$(Q)$(GDB) --eval-command="target extended-remote $(BMP_PORT)" --eval-command="set confirm off" --eval-command="monitor swdp_scan" --eval-command="attach 1" --eval-command="load" --eval-command="kill" --eval-command="quit" $(<)
-endif
-
-# reset device by setting the data width to 5 bis on the USB CDC ACM port
-ifeq ($(SWD_ADAPTER)$(BMP_PORT),BMP/dev/ttyACM0)
-ACM_PORT := /dev/ttyACM2
-else
-ACM_PORT := /dev/ttyACM0
-endif
-reset:
-	$(Q)stty --file $(ACM_PORT) raw cs5
-	$(Q)sleep 0.5
-
-# debug application using GDB
-debug: $(APPLICATION).elf
-ifeq ($(SWD_ADAPTER),STLINKV2)
-	# for GDB to work with openOCD the firmware needs to be reloaded
-	$(Q)$(GDB) --eval-command="target remote | $(OOCD) --file interface/$(OOCD_INTERFACE).cfg --file target/$(OOCD_TARGET).cfg --command \"gdb_port pipe; log_output /dev/null; init\"" --eval-command="monitor reset halt" --eval-command="load" --eval-command="monitor reset init" $(<)
-else ifeq ($(SWD_ADAPTER),BMP)
-	$(Q)$(GDB) --eval-command="target extended-remote $(BMP_PORT)" --eval-command="monitor version" --eval-command="monitor swdp_scan" --eval-command="attach 1" $(<)
-endif
-
-.PHONY: clean elf bin hex srec list flash reset
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..55df3ad
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,242 @@
+# encoding: utf-8
+# ruby: 2.4.2
+=begin
+Rakefile to manage compile CuVoodoo STM32F1 firmware.
+the firmware is for development board based around a STM32F1xx micro-controller.
+the firmware uses the libopencm3 library providing support for this micro-controller.
+=end
+require 'rake'
+require 'rake/clean'
+
+# the firmwares to compile
+BOOTLOADER = "bootloader"
+APPLICATION = "application"
+FIRMWARES = [BOOTLOADER, APPLICATION]
+
+# which development board is used
+# supported are: SYSTEM_BOARD, MAPLE_MINI, BLUE_PILL, CORE_BOARD
+BOARD = ENV["BOARD"] || "CORE_BOARD"
+
+# libopencm3 definitions
+LIBOPENCM3_DIR = "libopencm3"
+LIBOPENCM3_INC = LIBOPENCM3_DIR+"/include"
+LIBOPENCM3_LIB = LIBOPENCM3_DIR+"/lib"
+# STM32F1 library use for this project provided libtm
+STM32F1_LIB = "opencm3_stm32f1"
+
+# source code used by the firmware
+SRC_DIRS = [".", "lib"]
+
+# cross-compiler environment
+PREFIX = ENV["PREFIX"] || "arm-none-eabi"
+CC = "clang -target #{PREFIX}" # use clang instead of gcc
+LD = PREFIX+"-ld"
+AR = PREFIX+"-ar"
+AS = PREFIX+"-as"
+OBJCOPY = PREFIX+"-objcopy"
+OBJDUMP = PREFIX+"-objdump"
+GDB = PREFIX+"-gdb"
+
+# compiler flags
+cflags = [ENV["CFLAGS"]]
+# optimize for size
+cflags << "-Os"
+# add debug symbols (remove for smaller release)
+cflags << "-ggdb"
+# use C99 (supported by most an sufficient)
+cflags << "-std=c99"
+# have strict warning (for better code)
+cflags << "-Wpedantic -Wall -Werror -Wundef -Wextra -Wshadow -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -Wstrict-overflow=5"
+# add options for better code optimization
+cflags << "-fno-common -ffunction-sections -fdata-sections"
+# use variable size enum (clang doesn't but opencm3, and gcc do)
+cflags << "-fshort-enums"
+# don't use system main definition (the starting point)
+cflags << "-ffreestanding"
+# don't use the standard library (only if you provide an alternative libc library)
+#cflags << "-nostdlib -nostdinc"
+# include own libraries
+cflags += SRC_DIRS.collect {|srd_dir| "-I #{srd_dir}"}
+# include libopencm3 library
+cflags << "-I #{LIBOPENCM3_INC}"
+# add defines for micro-controller and board
+cflags << "-DSTM32F1 -D#{BOARD}"
+# render cflags
+cflags = cflags.compact*' '
+
+# linker flags
+ldflags = [ENV["LDFLAGS"]]
+# build static binary (no shared libraries on the micro-controller)
+ldflags << "-static"
+# don't include the system start files
+ldflags << "-nostartfiles"
+# only keep used sections
+ldflags << "--gc-sections"
+# don't use system libraries (only if you provide an alternative libc library)
+#ldflags << "-nostdlib -nostdinc"
+# add standard libraries (for libc, libm, libnosys, libgcc) and libopencm3
+library_paths = ["/usr/arm-none-eabi/lib/armv7-m/", "/usr/lib/gcc/arm-none-eabi/*/armv7-m/", LIBOPENCM3_LIB]
+ldflags += library_paths.collect {|library_path| "--library-path #{library_path}"}
+ldflags *= ' '
+# used libraries (gcc provides the ARM ABI)
+ldlibs = [STM32F1_LIB, "c", "m", "nosys", "gcc"]
+ldlibs = ldlibs.collect {|library| "--library #{library}"}
+ldlibs *= ' '
+
+# target micro-controller information (ARM Cortex-M3 supports thumb and thumb2, but does not include a floating point unit)
+archflags = "-mthumb -mcpu=cortex-m3 -msoft-float"
+
+desc "compile firmwares"
+task :default => FIRMWARES
+
+FIRMWARES.each do |firmware|
+  desc "compile #{firmware} firmware"
+  task firmware => [firmware+".elf", firmware+".bin", firmware+".hex"]
+  CLOBBER.include(firmware+".elf")
+  CLOBBER.include(firmware+".bin")
+  CLOBBER.include(firmware+".hex")
+  CLOBBER.include(firmware+".list")
+  CLOBBER.include(firmware+".map")
+end
+
+# get dependencies of a file
+# done is a list of already known dependencies
+def dependencies(source, done=[])
+  d_path = source.ext("d") # get the dependency file
+  Rake::Task[d_path].invoke # ensure the dependency file exists
+  d_file = IO.read(d_path) # read the dependencies from dependency file
+  d_file = d_file.split(': ')[1].gsub("\n",'').gsub('\\ ','').gsub(/\s+/,' ').split(' ') # get a list of dependencies
+  d_list = [] # list of dependencies
+  # only save dependencies which are in our source directories
+  d_file.each do |d|
+    SRC_DIRS.each do |dir|
+      if File.dirname(d)==dir then
+        d_list << d
+      end
+    end
+  end
+  # get the dependencies of these dependencies, if we don't know them already
+  done << source.ext("o")
+  done.uniq!
+  d_list.each do |d|
+    d = d.ext("o")
+    next if done.include? d
+    done += dependencies(d, done)
+  end
+  done.uniq!
+  return done
+end
+
+desc "get libopencm3"
+file LIBOPENCM3_DIR+"/Makefile" do
+  sh "git submodule init"
+  sh "git submodule update"
+end
+
+desc "compile libopencm3"
+file "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a" => LIBOPENCM3_DIR+"/Makefile" do
+  sh "make --directory #{LIBOPENCM3_DIR}"
+end
+
+task :doc => ["Doxyfile", "README.md"] do |t|
+  sh "doxygen #{t.source}"
+end
+
+desc "compile source into object"
+rule '.o' => '.c' do |t|
+  sh "#{CC} #{cflags} #{archflags} -o #{t.name} -c #{t.source}"
+end
+
+desc "generate dependencies"
+rule '.d' => '.c' do |t|
+  sh "#{CC} #{cflags} #{archflags} -MM -MF #{t.name} -c #{t.source}"
+end
+
+desc "link binary"
+rule '.elf' => [proc{|f| dependencies(f)}, '.ld', "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a"] do |t|
+  sh "#{LD} #{ldflags} --script #{t.name.ext('ld')} #{t.prerequisites[0..-3].join(' ')} #{ldlibs} -o #{t.name}"
+  sh "size #{t.name}"
+end
+
+desc "export binary"
+rule '.bin' => '.elf' do |t|
+  sh "#{OBJCOPY} --strip-all --strip-debug --output-target binary #{t.source} #{t.name}"
+end
+
+desc "export intel hex file"
+rule '.hex' => '.elf' do |t|
+  sh "#{OBJCOPY} --strip-all --strip-debug --output-target ihex #{t.source} #{t.name}"
+end
+
+desc "export list"
+rule '.list' => '.elf' do |t|
+  sh "#{OBJDUMP} -S #{t.source} > #{t.name}"
+end
+
+desc "export map"
+rule '.map' => '.elf' do |t|
+  sh "#{OBJDUMP} -S #{t.source} > #{t.name}"
+end
+
+SRC_DIRS.each do |src_dir|
+  CLEAN.include(src_dir+"/*.o")
+  CLEAN.include(src_dir+"/*.d")
+end
+
+# SWD/JTAG adapter used
+# supported are : STLINKV2 (ST-Link V2), BMP (Black Magic Probe)
+SWD_ADAPTER = ENV["SWD_ADAPTER"] || "BMP"
+# openOCD path to control the adapter
+OOCD = ENV["OOCD"] || "openocd"
+# openOCD adapted name
+OOCD_INTERFACE = ENV["OOCD_INTERFACE"] || (SWD_ADAPTER=="STLINKV2" ? "stlink-v2" : "")
+# openOCD target for the micro-controller
+OOCD_TARGET = "stm32f1x"
+# Black Magic Probe port
+BMP_PORT = ENV["BMP_PORT"] || "/dev/ttyACM0"
+
+desc "flash application using USB DFU"
+task :flash => APPLICATION+".bin" do |t|
+  sh "dfu-util -d c440:0d00 -D #{t.source}"
+end
+
+desc "flash bootloader using SWD"
+task :flash_bootloader => BOOTLOADER+".hex" do |t|
+  case SWD_ADAPTER
+    when "STLINKV2"
+      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'reset init' --command 'flash write_image erase #{t.source}' --command 'reset' --command 'shutdown'"
+    when "BMP"
+      sh "#{GDB} --eval-command='target extended-remote #{BMP_PORT}' --eval-command='set confirm off' --eval-command='monitor swdp_scan' --eval-command='attach 1' --eval-command='load' --eval-command='kill' --eval-command='quit' #{t.source}"
+  end
+end
+
+desc "flash application using SWD"
+task :flash_application => APPLICATION+".hex" do |t|
+  case SWD_ADAPTER
+    when "STLINKV2"
+      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'reset init' --command 'flash write_image erase #{t.source}' --command 'reset' --command 'shutdown'"
+    when "BMP"
+      sh "#{GDB} --eval-command='target extended-remote #{BMP_PORT}' --eval-command='set confirm off' --eval-command='monitor swdp_scan' --eval-command='attach 1' --eval-command='load' --eval-command='kill' --eval-command='quit' #{t.source}"
+  end
+end
+
+# debug application using GDB
+desc "debug application using GDB"
+task :debug => APPLICATION+".elf" do |t|
+  case SWD_ADAPTER
+    when "STLINKV2"
+      # for GDB to work with openOCD the firmware needs to be reloaded
+      sh "#{GDB} --eval-command='target remote | #{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --file target/#{OOCD_TARGET}.cfg --command \"gdb_port pipe; log_output /dev/null; init\"' --eval-command='monitor reset halt' --eval-command='load' --eval-command='monitor reset init' #{t.source}"
+    when "BMP"
+      sh "#{GDB} --eval-command='target extended-remote #{BMP_PORT}' --eval-command='monitor version' --eval-command='monitor swdp_scan' --eval-command='attach 1' #{t.source}"
+  end
+end
+
+# reset device by setting the data width to 5 bis on the USB CDC ACM port
+ACM_PORT = ENV["ACM_PORT"] || ("/dev/ttyACM0"==BMP_PORT ? "/dev/ttyACM2" : "/dev/ttyACM0")
+
+desc "reset application using serial"
+task :reset do
+  sh "stty --file #{ACM_PORT} raw cs5"
+  sleep 0.5
+end