diff --git a/Rakefile b/Rakefile
index cbc0c6f..0000316 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,8 +1,8 @@
 # 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.
+Rakefile to manage compiling CuVoodoo STM32F4 firmware.
+the firmware is for development boards based around a STM32F4xx micro-controller.
 the firmware uses the libopencm3 library providing support for this micro-controller.
 =end
 require 'rake'
@@ -14,15 +14,15 @@ APPLICATION = "application"
 FIRMWARES = [BOOTLOADER, APPLICATION]
 
 # which development board is used
-# supported are: SYSTEM_BOARD, MAPLE_MINI, BLUE_PILL, BLACK_PILL, CORE_BOARD, STLINKV2, BLASTER, BUSVOODOO
-BOARD = ENV["BOARD"] || "BLUE_PILL"
+# supported are: WeAct MiniF4 with STM32F401
+BOARD = ENV["BOARD"] || "MINIF401"
 
 # libopencm3 definitions
 LIBOPENCM3_DIR = "libopencm3"
 LIBOPENCM3_INC = LIBOPENCM3_DIR+"/include"
 LIBOPENCM3_LIB = LIBOPENCM3_DIR+"/lib"
-# STM32F1 library used for this project provided by libopencm3
-STM32F1_LIB = "opencm3_stm32f1"
+# STM32F4 library used for this project provided by libopencm3
+STM32F4_LIB = "opencm3_stm32f4"
 
 # source code used by the firmware
 SRC_DIRS = [".", "lib"]
@@ -59,7 +59,7 @@ 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}"
+cflags << "-DSTM32F4 -D#{BOARD}"
 # render cflags
 cflags = cflags.compact*' '
 
@@ -78,12 +78,12 @@ ldflags_linker << "--print-memory-usage"
 # add libopencm3 libraries
 library_paths = [LIBOPENCM3_LIB]
 # project libraries
-ldlibs = [STM32F1_LIB]
+ldlibs = [STM32F4_LIB]
 # general libraries (gcc provides the ARM ABI)
 ldlibs_linker = ["m", "c", "nosys", "gcc"]
 
-# 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"
+# target micro-controller information (ARM Cortex-M4 supports thumb and thumb2, but does not include a floating point unit)
+archflags = "-mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16"
 
 desc "compile firmwares"
 task :default => FIRMWARES
@@ -134,7 +134,7 @@ file LIBOPENCM3_DIR+"/Makefile" do
 end
 
 desc "compile libopencm3"
-file "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a" => LIBOPENCM3_DIR+"/Makefile" do
+file "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a" => LIBOPENCM3_DIR+"/Makefile" do
   sh "make --directory #{LIBOPENCM3_DIR}"
 end
 
@@ -143,17 +143,17 @@ task :doc => ["Doxyfile", "README.md"] do |t|
 end
 
 desc "compile source into object"
-rule '.o' => ['.c', proc{|f| File.file?(f.ext("h")) ? f.ext("h") : []}, proc{|f| dependencies(f).collect{|d| File.file?(d.ext("h")) ? d.ext("h") : []}}, "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a"] do |t|
+rule '.o' => ['.c', proc{|f| File.file?(f.ext("h")) ? f.ext("h") : []}, proc{|f| dependencies(f).collect{|d| File.file?(d.ext("h")) ? d.ext("h") : []}}, "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
   sh "#{CC} #{cflags} #{archflags} -o #{t.name} -c #{t.prerequisites[0]}"
 end
 
 desc "generate dependencies"
-rule '.d' => ['.c', "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a"] do |t|
+rule '.d' => ['.c', "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
   sh "#{CC} #{cflags} #{archflags} -MM -MF #{t.name} -c #{t.prerequisites[0]}"
 end
 
 desc "link binary"
-rule '.elf' => ['.o', proc{|f| dependencies(f)}, '.ld', "#{LIBOPENCM3_LIB}/lib#{STM32F1_LIB}.a"] do |t|
+rule '.elf' => ['.o', proc{|f| dependencies(f)}, '.ld', "#{LIBOPENCM3_LIB}/lib#{STM32F4_LIB}.a"] do |t|
   sh "#{LD} #{archflags} #{ldflags.join(' ')} #{t.prerequisites[0..-3].join(' ')} -T#{t.name.ext('ld')} #{ldflags_linker.collect{|flag| "-Wl,"+flag}.join(' ')} #{library_paths.collect{|path| "-L"+path}.join(' ')} #{ldlibs.collect{|lib| "-l"+lib}.join(' ')} -Wl,--start-group #{ldlibs_linker.collect{|lib| "-l"+lib}.join(' ')} -Wl,--end-group --output #{t.name}"
 end
 
@@ -190,22 +190,20 @@ OOCD = ENV["OOCD"] || "openocd"
 # openOCD adapted name
 OOCD_INTERFACE = ENV["OOCD_INTERFACE"] || (SWD_ADAPTER=="STLINKV2" ? "stlink" : "")
 # openOCD target for the micro-controller
-OOCD_TARGET = "stm32f1x"
+OOCD_TARGET = "stm32f4x"
 # Black Magic Probe port
 BMP_PORT = ENV["BMP_PORT"] || "/dev/ttyACM0"
-# set CPUTAPID (0x1ba01477 for STM32, 0x2ba01477 for CKS32/APM32)
-CPUTAPID = ENV["CPUTAPID"] || "0x1ba01477"
 
 desc "flash application using USB DFU"
 task :flash => APPLICATION+".bin" do |t|
   sh "dfu-util --device 1209:4356 --download #{t.source}"
 end
 
-desc "remove STM32F1 protection using SWD"
+desc "remove STM32F4 protection using SWD"
 task :remove_protection do
   case SWD_ADAPTER
     when "STLINKV2"
-      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --command 'set CPUTAPID #{CPUTAPID}' --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'halt' --command 'reset init' --command 'stm32f1x unlock 0' --command 'reset init' --command 'flash protect 0 0 last off' --command 'reset init' --command 'stm32f1x options_write 0 SWWDG NORSTSTNDBY NORSTSTOP' --command 'reset init' --command 'stm32f1x mass_erase 0' --command 'shutdown'"
+      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'halt' --command 'reset init' --command 'stm32f4x unlock 0' --command 'reset init' --command 'flash protect 0 0 last off' --command 'reset init' --command 'stm32f4x options_write 0 SWWDG NORSTSTNDBY NORSTSTOP' --command 'reset init' --command 'stm32f4x mass_erase 0' --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='monitor option erase' --eval-command='monitor erase_mass' --eval-command='kill' --eval-command='quit'"
   end
@@ -215,7 +213,7 @@ desc "flash bootloader using SWD"
 task :flash_bootloader => BOOTLOADER+".hex" do |t|
   case SWD_ADAPTER
     when "STLINKV2"
-      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --command 'set CPUTAPID #{CPUTAPID}' --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'halt' --command 'reset init' --command 'flash erase_sector 0 0 last' --command 'flash write_image erase #{t.source}' --command 'reset' --command 'shutdown'"
+      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --file target/#{OOCD_TARGET}.cfg --command 'init' --command 'halt' --command 'reset init' --command 'flash erase_sector 0 0 last' --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='monitor erase_mass' --eval-command='load' --eval-command='kill' --eval-command='quit' #{t.source}"
   end
@@ -225,7 +223,7 @@ desc "flash application using SWD"
 task :flash_application => APPLICATION+".hex" do |t|
   case SWD_ADAPTER
     when "STLINKV2"
-      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --command 'set CPUTAPID #{CPUTAPID}' --file target/#{OOCD_TARGET}.cfg --command 'adapter speed 100' --command 'init' --command 'halt' --command 'reset init' --command 'flash write_image erase #{t.source}' --command 'reset' --command 'shutdown'"
+      sh "#{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command 'transport select hla_swd' --file target/#{OOCD_TARGET}.cfg --command 'adapter speed 100' --command 'init' --command 'halt' --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
@@ -237,7 +235,7 @@ task :debug => APPLICATION+".elf" do |t|
   case SWD_ADAPTER
     when "STLINKV2"
       # for GDB to work with openOCD the firmware needs to be reloaded
-      exec("#{GDB} --eval-command='target remote | #{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command \"transport select hla_swd\" --command \"set CPUTAPID #{CPUTAPID}\" --file target/#{OOCD_TARGET}.cfg --command \"gdb_port pipe; log_output /dev/null; init\"' #{t.source}")
+      exec("#{GDB} --eval-command='target remote | #{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command \"transport select hla_swd\" --file target/#{OOCD_TARGET}.cfg --command \"gdb_port pipe; log_output /dev/null; init\"' #{t.source}")
     when "BMP"
       exec("#{GDB} --eval-command='target extended-remote #{BMP_PORT}' --eval-command='monitor version' --eval-command='monitor swdp_scan' --eval-command='attach 1' #{t.source}")
   end
@@ -249,7 +247,7 @@ task :debug_bootloader => BOOTLOADER+".elf" do |t|
   case SWD_ADAPTER
     when "STLINKV2"
       # for GDB to work with openOCD the firmware needs to be reloaded
-      exec("#{GDB} --eval-command='target remote | #{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command \"transport select hla_swd\" --command \"set CPUTAPID #{CPUTAPID}\" --file target/#{OOCD_TARGET}.cfg --command \"gdb_port pipe; log_output /dev/null; init\"' --eval-command='monitor reset init' #{t.source}")
+      exec("#{GDB} --eval-command='target remote | #{OOCD} --file interface/#{OOCD_INTERFACE}.cfg --command \"transport select hla_swd\" --file target/#{OOCD_TARGET}.cfg --command \"gdb_port pipe; log_output /dev/null; init\"' --eval-command='monitor reset init' #{t.source}")
     when "BMP"
       exec("#{GDB} --eval-command='target extended-remote #{BMP_PORT}' --eval-command='monitor version' --eval-command='monitor swdp_scan' --eval-command='attach 1' #{t.source}")
   end