diff --git a/F0:F030,F042,F072/3steppersLB/Makefile b/F0:F030,F042,F072/3steppersLB/Makefile
index a43912c..3deffe6 100644
--- a/F0:F030,F042,F072/3steppersLB/Makefile
+++ b/F0:F030,F042,F072/3steppersLB/Makefile
@@ -1,156 +1,8 @@
-BINARY		= steppers
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 57600
-# MCU FAMILY
-FAMILY		?= F0
+BINARY      := steppers
 # MCU code
-MCU			?= F072xB
-#DEFS		+= -DEBUG
+MCU         := F072xB
 # change this linking script depending on particular MCU model,
-# for example, if you have STM32F103VBT6, you should write:
-LDSCRIPT	?= stm32f072B.ld
+LDSCRIPT    := stm32f072B.ld
 
-# autoincremental version & build date
-VERSION_FILE = version.inc
-NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-INDEPENDENT_HEADERS=
-
-FP_FLAGS	?= -msoft-float
-ASM_FLAGS	= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-OPREFIX		?= /opt/bin/arm-none-eabi
-#PREFIX		?= /usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/7.3.0/arm-none-eabi
-PREFIX		?= $(OPREFIX)
-
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-OBJCOPY		:= $(OPREFIX)-objcopy
-OBJDUMP		:= $(OPREFIX)-objdump
-GDB			:= $(OPREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		= mk
-LDSCRIPT	?= $(BINARY).ld
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -MD -D__thumb2__=1
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration
-CFLAGS		+= -Wredundant-decls $(INCLUDE)
-# -Wmissing-prototypes -Wstrict-prototypes
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -flto
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= --static -nostartfiles -nostdlib
-LDFLAGS		+= -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -flto
-LDFLAGS		+= -L$(LIB_DIR)
-LDFLAGS		+= -T$(LDSCRIPT)
-LDFLAGS		+= -Wl,-Map=$(OBJDIR)/$(BINARY).map
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group
-LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-#.SUFFIXES: .elf .bin .hex .srec .list .map .images
-#.SECONDEXPANSION:
-#.SECONDARY:
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/strfunct.o: strfunct.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c 
-#	@make $(VERSION_FILE)
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-%.s: %.c
-	@echo "  ASM      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -S -o $(OBJDIR)/$@ -c $<
-
-$(BIN): $(ELF) 
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-clean:
-	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map $(OBJDIR)/*.d $(OBJDIR)/*.s
-	@rmdir $(OBJDIR) 2>/dev/null || true
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -R -D $(BIN) -s 0x08000000
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-.PHONY: clean dfuboot flash boot
+include ../makefile.f0
+include ../../makefile.stm32
diff --git a/F0:F030,F042,F072/3steppersLB/Makefile.old b/F0:F030,F042,F072/3steppersLB/Makefile.old
new file mode 100644
index 0000000..a43912c
--- /dev/null
+++ b/F0:F030,F042,F072/3steppersLB/Makefile.old
@@ -0,0 +1,156 @@
+BINARY		= steppers
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 57600
+# MCU FAMILY
+FAMILY		?= F0
+# MCU code
+MCU			?= F072xB
+#DEFS		+= -DEBUG
+# change this linking script depending on particular MCU model,
+# for example, if you have STM32F103VBT6, you should write:
+LDSCRIPT	?= stm32f072B.ld
+
+# autoincremental version & build date
+VERSION_FILE = version.inc
+NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+INDEPENDENT_HEADERS=
+
+FP_FLAGS	?= -msoft-float
+ASM_FLAGS	= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+OPREFIX		?= /opt/bin/arm-none-eabi
+#PREFIX		?= /usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/7.3.0/arm-none-eabi
+PREFIX		?= $(OPREFIX)
+
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+OBJCOPY		:= $(OPREFIX)-objcopy
+OBJDUMP		:= $(OPREFIX)-objdump
+GDB			:= $(OPREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		= mk
+LDSCRIPT	?= $(BINARY).ld
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -MD -D__thumb2__=1
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration
+CFLAGS		+= -Wredundant-decls $(INCLUDE)
+# -Wmissing-prototypes -Wstrict-prototypes
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -flto
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= --static -nostartfiles -nostdlib
+LDFLAGS		+= -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -flto
+LDFLAGS		+= -L$(LIB_DIR)
+LDFLAGS		+= -T$(LDSCRIPT)
+LDFLAGS		+= -Wl,-Map=$(OBJDIR)/$(BINARY).map
+
+###############################################################################
+# Used libraries
+LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group
+LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+#.SUFFIXES: .elf .bin .hex .srec .list .map .images
+#.SECONDEXPANSION:
+#.SECONDARY:
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/strfunct.o: strfunct.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c 
+#	@make $(VERSION_FILE)
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+%.s: %.c
+	@echo "  ASM      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -S -o $(OBJDIR)/$@ -c $<
+
+$(BIN): $(ELF) 
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+clean:
+	@echo "  CLEAN"
+	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map $(OBJDIR)/*.d $(OBJDIR)/*.s
+	@rmdir $(OBJDIR) 2>/dev/null || true
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -R -D $(BIN) -s 0x08000000
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+.PHONY: clean dfuboot flash boot
diff --git a/F0:F030,F042,F072/CANBUS_SSI/Makefile b/F0:F030,F042,F072/CANBUS_SSI/Makefile
index a4f0cf7..1e283d7 100644
--- a/F0:F030,F042,F072/CANBUS_SSI/Makefile
+++ b/F0:F030,F042,F072/CANBUS_SSI/Makefile
@@ -1,155 +1,9 @@
-# make debug adds -DEBUG -Werror
-# make ADDEFS="additional defs"
-BINARY		= canstepper
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-# MCU FAMILY
-FAMILY		?= F0
-# MCU code (STM32F072xx)
-MCU			?= F072xB
+BINARY      := canstepper
+# MCU code
+MCU         ?= F072xB
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f0728.ld
-DEFS		= ${ADDEFS} -DVERSION=\"0.0.1\" -DUSARTNUM=1
-TARGET := RELEASE
+LDSCRIPT    ?= stm32f0728.ld
+DEFINES     := -DVERSION=\"0.0.1\" -DUSARTNUM=1
 
-FP_FLAGS	?= -msoft-float
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-#PREFIX		?= arm-none-eabi
-# gcc from arm web site
-PREFIX		?= /opt/bin/arm-none-eabi
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		= mk
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -MD -D__thumb2__=1
-CFLAGS		+= -Wall -Wextra -Wshadow
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= --static -nostartfiles --specs=nano.specs
-LDFLAGS		+= -L$(LIB_DIR)
-LDFLAGS		+= -T$(LDSCRIPT)
-LDFLAGS     += -Wl,-Map=$(OBJDIR)/$(BINARY).map
-LDFLAGS     += -Wl,--gc-sections
-
-###############################################################################
-# Used libraries
-LDLIBS      += -Wl,--start-group -lc -lgcc -Wl,--end-group
-LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: $(OBJDIR)/RELEASE bin list size
-release: all
-
-debug: CFLAGS += -DEBUG -Werror -W -Wimplicit-function-declaration
-debug: $(OBJDIR)/DEBUG bin list size
-
-$(OBJDIR)/DEBUG:
-	@rm -rf $(OBJDIR)
-	@mkdir $(OBJDIR)
-	@> $(OBJDIR)/DEBUG
-	@echo "TARGET: DEBUG"
-	echo "CFLAGS += -DEBUG -Werror -W -Wimplicit-function-declaration" > $(OBJDIR)/CFLAGS
-$(OBJDIR)/RELEASE:
-	@rm -rf $(OBJDIR)
-	@mkdir $(OBJDIR)
-	@> $(OBJDIR)/RELEASE
-	@echo "TARGET: RELEASE"
-	echo "" > $(OBJDIR)/CFLAGS
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
--include $(OBJDIR)/CFLAGS
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	@echo "  CC   startup"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC	  $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD	  $(ELF)"
-	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)
-
-clean:
-	@echo "  CLEAN"
-	@$(RM) $(HEX)
-	@$(RM) -rf $(OBJDIR) 2>/dev/null || true
-
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) --reset write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-.PHONY: clean flash boot
+include ../makefile.f0
+include ../../makefile.stm32
diff --git a/F0:F030,F042,F072/CANBUS_SSI/Makefile.old b/F0:F030,F042,F072/CANBUS_SSI/Makefile.old
new file mode 100644
index 0000000..a4f0cf7
--- /dev/null
+++ b/F0:F030,F042,F072/CANBUS_SSI/Makefile.old
@@ -0,0 +1,155 @@
+# make debug adds -DEBUG -Werror
+# make ADDEFS="additional defs"
+BINARY		= canstepper
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+# MCU FAMILY
+FAMILY		?= F0
+# MCU code (STM32F072xx)
+MCU			?= F072xB
+# change this linking script depending on particular MCU model,
+LDSCRIPT	?= stm32f0728.ld
+DEFS		= ${ADDEFS} -DVERSION=\"0.0.1\" -DUSARTNUM=1
+TARGET := RELEASE
+
+FP_FLAGS	?= -msoft-float
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+#PREFIX		?= arm-none-eabi
+# gcc from arm web site
+PREFIX		?= /opt/bin/arm-none-eabi
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		= mk
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -MD -D__thumb2__=1
+CFLAGS		+= -Wall -Wextra -Wshadow
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= --static -nostartfiles --specs=nano.specs
+LDFLAGS		+= -L$(LIB_DIR)
+LDFLAGS		+= -T$(LDSCRIPT)
+LDFLAGS     += -Wl,-Map=$(OBJDIR)/$(BINARY).map
+LDFLAGS     += -Wl,--gc-sections
+
+###############################################################################
+# Used libraries
+LDLIBS      += -Wl,--start-group -lc -lgcc -Wl,--end-group
+LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: $(OBJDIR)/RELEASE bin list size
+release: all
+
+debug: CFLAGS += -DEBUG -Werror -W -Wimplicit-function-declaration
+debug: $(OBJDIR)/DEBUG bin list size
+
+$(OBJDIR)/DEBUG:
+	@rm -rf $(OBJDIR)
+	@mkdir $(OBJDIR)
+	@> $(OBJDIR)/DEBUG
+	@echo "TARGET: DEBUG"
+	echo "CFLAGS += -DEBUG -Werror -W -Wimplicit-function-declaration" > $(OBJDIR)/CFLAGS
+$(OBJDIR)/RELEASE:
+	@rm -rf $(OBJDIR)
+	@mkdir $(OBJDIR)
+	@> $(OBJDIR)/RELEASE
+	@echo "TARGET: RELEASE"
+	echo "" > $(OBJDIR)/CFLAGS
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+-include $(OBJDIR)/CFLAGS
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	@echo "  CC   startup"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC	  $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD	  $(ELF)"
+	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)
+
+clean:
+	@echo "  CLEAN"
+	@$(RM) $(HEX)
+	@$(RM) -rf $(OBJDIR) 2>/dev/null || true
+
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) --reset write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+.PHONY: clean flash boot
diff --git a/F0:F030,F042,F072/CANBUS_SSI/canstepper.bin b/F0:F030,F042,F072/CANBUS_SSI/canstepper.bin
index 041297e..9c064b3 100755
Binary files a/F0:F030,F042,F072/CANBUS_SSI/canstepper.bin and b/F0:F030,F042,F072/CANBUS_SSI/canstepper.bin differ
diff --git a/F0:F030,F042,F072/CANBUS_SSI/version.inc b/F0:F030,F042,F072/CANBUS_SSI/version.inc
new file mode 100644
index 0000000..ffbe84f
--- /dev/null
+++ b/F0:F030,F042,F072/CANBUS_SSI/version.inc
@@ -0,0 +1,2 @@
+#define BUILD_NUMBER "1"
+#define BUILD_DATE "2023-01-18"
diff --git a/F0:F030,F042,F072/PL2303_ringbuffer/Makefile b/F0:F030,F042,F072/PL2303_ringbuffer/Makefile
index b6f4bf4..ff2fdcc 100644
--- a/F0:F030,F042,F072/PL2303_ringbuffer/Makefile
+++ b/F0:F030,F042,F072/PL2303_ringbuffer/Makefile
@@ -1,154 +1,8 @@
-BINARY		= PL2303
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-INDEPENDENT_HEADERS=
-# MCU FAMILY
-FAMILY		?= F0
+BINARY      := PL2303
 # MCU code
-MCU			?= F042x6
+MCU         ?= F072xB
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f042x6.ld
+LDSCRIPT    ?= stm32f0728.ld
 
-# autoincremental version & build date
-VERSION_FILE = version.inc
-NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-FP_FLAGS	?= -msoft-float
-# -mfloat-abi=soft
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-#PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-MAP			= $(OBJDIR)/$(BINARY).map
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -MD -D__thumb2__=1 
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration -Wredundant-decls
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
-# -fno-stack-protector -fshort-enums
-CFLAGS		+=  $(ARCH_FLAGS) $(INCLUDE)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles --static -Wl,--print-memory-usage
-# --specs=nano.specs -nostdlib
-LDFLAGS		+= -Wl,-Map=$(MAP) -Wl,--gc-sections
-LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT) $(ARCH_FLAGS)
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list size
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(MAP)
-	@rmdir $(OBJDIR) 2>/dev/null || true
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) --reset write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-openocd:
-	openocd -f openocd.cfg 
-dbg:
-	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
-
-.PHONY: clean flash boot dfuboot size dbg openocd
+include ../makefile.f0
+include ../../makefile.stm32
diff --git a/F0:F030,F042,F072/PL2303_ringbuffer/Makefile.old b/F0:F030,F042,F072/PL2303_ringbuffer/Makefile.old
new file mode 100644
index 0000000..b6f4bf4
--- /dev/null
+++ b/F0:F030,F042,F072/PL2303_ringbuffer/Makefile.old
@@ -0,0 +1,154 @@
+BINARY		= PL2303
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+INDEPENDENT_HEADERS=
+# MCU FAMILY
+FAMILY		?= F0
+# MCU code
+MCU			?= F042x6
+# change this linking script depending on particular MCU model,
+LDSCRIPT	?= stm32f042x6.ld
+
+# autoincremental version & build date
+VERSION_FILE = version.inc
+NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+FP_FLAGS	?= -msoft-float
+# -mfloat-abi=soft
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+#PREFIX		?= arm-none-eabi
+# gcc from arm web site 
+PREFIX		?= /opt/bin/arm-none-eabi
+TOOLCHLIB	?= /opt/arm-none-eabi/lib
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		:= mk
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+MAP			= $(OBJDIR)/$(BINARY).map
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -MD -D__thumb2__=1 
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration -Wredundant-decls
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
+# -fno-stack-protector -fshort-enums
+CFLAGS		+=  $(ARCH_FLAGS) $(INCLUDE)
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= -nostartfiles --static -Wl,--print-memory-usage
+# --specs=nano.specs -nostdlib
+LDFLAGS		+= -Wl,-Map=$(MAP) -Wl,--gc-sections
+LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
+LDFLAGS		+= -T$(LDSCRIPT) $(ARCH_FLAGS)
+
+###############################################################################
+# Used libraries
+LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list size
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)    
+
+clean:
+	@echo "  CLEAN"
+	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(MAP)
+	@rmdir $(OBJDIR) 2>/dev/null || true
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) --reset write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+openocd:
+	openocd -f openocd.cfg 
+dbg:
+	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
+
+.PHONY: clean flash boot dfuboot size dbg openocd
diff --git a/F0:F030,F042,F072/PL2303_ringbuffer/PL2303.bin b/F0:F030,F042,F072/PL2303_ringbuffer/PL2303.bin
index f2ab216..7bc4d45 100755
Binary files a/F0:F030,F042,F072/PL2303_ringbuffer/PL2303.bin and b/F0:F030,F042,F072/PL2303_ringbuffer/PL2303.bin differ
diff --git a/F0:F030,F042,F072/makefile.f0 b/F0:F030,F042,F072/makefile.f0
new file mode 100644
index 0000000..890a0b4
--- /dev/null
+++ b/F0:F030,F042,F072/makefile.f0
@@ -0,0 +1,5 @@
+# common include for all F0 series
+# MCU FAMILY
+FAMILY		?= F0
+FP_FLAGS	?= -msoft-float -fsingle-precision-constant -mlittle-endian
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
diff --git a/F0:F030,F042,F072/usbcan/Makefile b/F0:F030,F042,F072/usbcan/Makefile
index e000cdf..0baf277 100644
--- a/F0:F030,F042,F072/usbcan/Makefile
+++ b/F0:F030,F042,F072/usbcan/Makefile
@@ -1,147 +1,8 @@
-BINARY		= usbcan
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 57600
-# MCU FAMILY
-FAMILY		= F0
+BINARY		:= usbcan
 # MCU code
-MCU			= F042x6
-# hardware definitions
-#DEFS		+= -DEBUG
+MCU			:= F042x6
 # change this linking script depending on particular MCU model,
-# for example, if you have STM32F103VBT6, you should write:
-LDSCRIPT	= stm32f042k.ld
+LDSCRIPT	:= stm32f042k.ld
 
-INDEPENDENT_HEADERS=
-
-FP_FLAGS	?= -msoft-float
-ASM_FLAGS	= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-OPREFIX		?= /opt/bin/arm-none-eabi
-#PREFIX		?= /usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/7.3.0/arm-none-eabi
-PREFIX		?= $(OPREFIX)
-
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-OBJCOPY		:= $(OPREFIX)-objcopy
-OBJDUMP		:= $(OPREFIX)-objdump
-GDB			:= $(OPREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		= mk
-LDSCRIPT	?= $(BINARY).ld
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -MD -D__thumb2__=1
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration
-CFLAGS		+= -Wredundant-decls $(INCLUDE)
-# -Wmissing-prototypes -Wstrict-prototypes
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= --static -nostartfiles
-#--specs=nano.specs
-LDFLAGS		+= -L$(LIB_DIR)
-LDFLAGS		+= -T$(LDSCRIPT)
-LDFLAGS		+= -Wl,-Map=$(OBJDIR)/$(BINARY).map
-LDFLAGS		+= -Wl,--gc-sections
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group
-LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-#.SUFFIXES: .elf .bin .hex .srec .list .map .images
-#.SECONDEXPANSION:
-#.SECONDARY:
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
-
-#$(OBJDIR)/%.d: %.c $(OBJDIR)
-#	$(CC) -MM -MG $< | sed -e 's,^\([^:]*\)\.o[ ]*:,$(@D)/\1.o $(@D)/\1.d:,' >$@
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-clean:
-	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map *.d
-	@rmdir $(OBJDIR) 2>/dev/null || true
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-gentags:
-	CFLAGS="$(CFLAGS) $(DEFS)" geany -g $(BINARY).c.tags *[hc] 2>/dev/null
-
-.PHONY: clean flash boot gentags
+include ../makefile.f0
+include ../../makefile.stm32
diff --git a/F0:F030,F042,F072/usbcan/Makefile.old b/F0:F030,F042,F072/usbcan/Makefile.old
new file mode 100644
index 0000000..e000cdf
--- /dev/null
+++ b/F0:F030,F042,F072/usbcan/Makefile.old
@@ -0,0 +1,147 @@
+BINARY		= usbcan
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 57600
+# MCU FAMILY
+FAMILY		= F0
+# MCU code
+MCU			= F042x6
+# hardware definitions
+#DEFS		+= -DEBUG
+# change this linking script depending on particular MCU model,
+# for example, if you have STM32F103VBT6, you should write:
+LDSCRIPT	= stm32f042k.ld
+
+INDEPENDENT_HEADERS=
+
+FP_FLAGS	?= -msoft-float
+ASM_FLAGS	= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+OPREFIX		?= /opt/bin/arm-none-eabi
+#PREFIX		?= /usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/7.3.0/arm-none-eabi
+PREFIX		?= $(OPREFIX)
+
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+OBJCOPY		:= $(OPREFIX)-objcopy
+OBJDUMP		:= $(OPREFIX)-objdump
+GDB			:= $(OPREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		= mk
+LDSCRIPT	?= $(BINARY).ld
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -MD -D__thumb2__=1
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration
+CFLAGS		+= -Wredundant-decls $(INCLUDE)
+# -Wmissing-prototypes -Wstrict-prototypes
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= --static -nostartfiles
+#--specs=nano.specs
+LDFLAGS		+= -L$(LIB_DIR)
+LDFLAGS		+= -T$(LDSCRIPT)
+LDFLAGS		+= -Wl,-Map=$(OBJDIR)/$(BINARY).map
+LDFLAGS		+= -Wl,--gc-sections
+
+###############################################################################
+# Used libraries
+LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group
+LDLIBS		+= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+#.SUFFIXES: .elf .bin .hex .srec .list .map .images
+#.SECONDEXPANSION:
+#.SECONDARY:
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) $(ARCH_FLAGS) -o $@ -c $<
+
+#$(OBJDIR)/%.d: %.c $(OBJDIR)
+#	$(CC) -MM -MG $< | sed -e 's,^\([^:]*\)\.o[ ]*:,$(@D)/\1.o $(@D)/\1.d:,' >$@
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+clean:
+	@echo "  CLEAN"
+	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(OBJDIR)/*.map *.d
+	@rmdir $(OBJDIR) 2>/dev/null || true
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+gentags:
+	CFLAGS="$(CFLAGS) $(DEFS)" geany -g $(BINARY).c.tags *[hc] 2>/dev/null
+
+.PHONY: clean flash boot gentags
diff --git a/F0:F030,F042,F072/usbcan/usbcan.bin b/F0:F030,F042,F072/usbcan/usbcan.bin
old mode 100644
new mode 100755
index 707e7c5..6ce42b1
Binary files a/F0:F030,F042,F072/usbcan/usbcan.bin and b/F0:F030,F042,F072/usbcan/usbcan.bin differ
diff --git a/F0:F030,F042,F072/usbcan/version.inc b/F0:F030,F042,F072/usbcan/version.inc
new file mode 100644
index 0000000..ffbe84f
--- /dev/null
+++ b/F0:F030,F042,F072/usbcan/version.inc
@@ -0,0 +1,2 @@
+#define BUILD_NUMBER "1"
+#define BUILD_DATE "2023-01-18"
diff --git a/F0:F030,F042,F072/usbcan_ringbuffer/Makefile b/F0:F030,F042,F072/usbcan_ringbuffer/Makefile
index a997924..f959722 100644
--- a/F0:F030,F042,F072/usbcan_ringbuffer/Makefile
+++ b/F0:F030,F042,F072/usbcan_ringbuffer/Makefile
@@ -1,161 +1,8 @@
-BINARY		= usbcan
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-INDEPENDENT_HEADERS=
-# MCU FAMILY
-FAMILY		?= F0
+BINARY      := usbcan
 # MCU code
-MCU			?= F042x6
+MCU         := F042x6
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f042x6.ld
-#DEFS = -DEBUG
+LDSCRIPT    := stm32f042x6.ld
 
-# autoincremental version & build date
-VERSION_FILE = version.inc
-ifeq ($(shell test -e $(VERSION_FILE) && echo -n yes), yes)
-	NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-else
-	NEXTVER := "1"
-endif
-
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-FP_FLAGS	?= -msoft-float
-# -mfloat-abi=soft
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-#PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-MAP			= $(OBJDIR)/$(BINARY).map
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -MD -D__thumb2__=1 
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration -Wredundant-decls
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
-# -fno-stack-protector -fshort-enums
-CFLAGS		+=  $(ARCH_FLAGS) $(INCLUDE)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles --static -Wl,--print-memory-usage
-# --specs=nano.specs -nostdlib
-LDFLAGS		+= -Wl,-Map=$(MAP) -Wl,--gc-sections
-LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT) $(ARCH_FLAGS)
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list size
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	[ -f $(VERSION_FILE) ] || echo -e "#define BUILD_NUMBER \"0\"\n#define BUILD_DATE \"none\"" > $(VERSION_FILE)
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(MAP)
-	@rmdir $(OBJDIR) 2>/dev/null || true
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) --reset write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-openocd:
-	openocd -f openocd.cfg 
-dbg:
-	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
-
-.PHONY: clean flash boot dfuboot size dbg openocd
+include ../makefile.f0
+include ../../makefile.stm32
diff --git a/F0:F030,F042,F072/usbcan_ringbuffer/Makefile.old b/F0:F030,F042,F072/usbcan_ringbuffer/Makefile.old
new file mode 100644
index 0000000..a997924
--- /dev/null
+++ b/F0:F030,F042,F072/usbcan_ringbuffer/Makefile.old
@@ -0,0 +1,161 @@
+BINARY		= usbcan
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+INDEPENDENT_HEADERS=
+# MCU FAMILY
+FAMILY		?= F0
+# MCU code
+MCU			?= F042x6
+# change this linking script depending on particular MCU model,
+LDSCRIPT	?= stm32f042x6.ld
+#DEFS = -DEBUG
+
+# autoincremental version & build date
+VERSION_FILE = version.inc
+ifeq ($(shell test -e $(VERSION_FILE) && echo -n yes), yes)
+	NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+else
+	NEXTVER := "1"
+endif
+
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+FP_FLAGS	?= -msoft-float
+# -mfloat-abi=soft
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m0 -march=armv6-m -mtune=cortex-m0
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+#PREFIX		?= arm-none-eabi
+# gcc from arm web site 
+PREFIX		?= /opt/bin/arm-none-eabi
+TOOLCHLIB	?= /opt/arm-none-eabi/lib
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		:= mk
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+MAP			= $(OBJDIR)/$(BINARY).map
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -MD -D__thumb2__=1 
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow -Wimplicit-function-declaration -Wredundant-decls
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections
+# -fno-stack-protector -fshort-enums
+CFLAGS		+=  $(ARCH_FLAGS) $(INCLUDE)
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= -nostartfiles --static -Wl,--print-memory-usage
+# --specs=nano.specs -nostdlib
+LDFLAGS		+= -Wl,-Map=$(MAP) -Wl,--gc-sections
+LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
+LDFLAGS		+= -T$(LDSCRIPT) $(ARCH_FLAGS)
+
+###############################################################################
+# Used libraries
+LDLIBS		+= -Wl,--start-group -lc -lgcc -Wl,--end-group $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list size
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	[ -f $(VERSION_FILE) ] || echo -e "#define BUILD_NUMBER \"0\"\n#define BUILD_DATE \"none\"" > $(VERSION_FILE)
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)    
+
+clean:
+	@echo "  CLEAN"
+	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST) $(MAP)
+	@rmdir $(OBJDIR) 2>/dev/null || true
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) --reset write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+openocd:
+	openocd -f openocd.cfg 
+dbg:
+	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
+
+.PHONY: clean flash boot dfuboot size dbg openocd
diff --git a/F0:F030,F042,F072/usbcan_ringbuffer/usbcan.bin b/F0:F030,F042,F072/usbcan_ringbuffer/usbcan.bin
index 570f512..fb8059e 100755
Binary files a/F0:F030,F042,F072/usbcan_ringbuffer/usbcan.bin and b/F0:F030,F042,F072/usbcan_ringbuffer/usbcan.bin differ
diff --git a/F1:F103/Canon_managing_device/Makefile b/F1:F103/Canon_managing_device/Makefile
index 2fe3391..f225445 100644
--- a/F1:F103/Canon_managing_device/Makefile
+++ b/F1:F103/Canon_managing_device/Makefile
@@ -1,151 +1,9 @@
-BINARY		= canonusb
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-# MCU FAMILY
-FAMILY		?= F1
+BINARY      := canonusb
 # MCU code
-MCU			?= F103x8
-# density (stm32f10x.h, lines 70-84)
-DENSITY 	?= LD
+MCU         ?= F103x8
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f103x8.ld
-# debug
-#DEFS		= -DEBUG
+LDSCRIPT    ?= stm32f103x8.ld
+DEFINES     := -DSTM32F10X_LD
 
-# autoincremental version & build date
-VERSION_FILE = version.inc
-NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-INDEPENDENT_HEADERS=
-
-FP_FLAGS	?= -msoft-float -mfloat-abi=soft
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-#PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-LD			:= $(PREFIX)-gcc
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -D__thumb2__=1 -MD -g -gdwarf-2
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow 
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -fno-stack-protector -fshort-enums
-CFLAGS		+=  $(ARCH_FLAGS)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles -nostdlib --static -Wl,--gc-sections -Wl,--print-memory-usage
-LDFLAGS     += -Wl,-Map=$(OBJDIR)/$(BINARY).map
-#LDFLAGS		+= --static --gc-sections --print-memory-usage
-LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT)
-
-###############################################################################
-# Used libraries
-LDLIBS		+=  -lc -lgcc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list size
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	@rm -rf $(OBJDIR) 2>/dev/null || true
-
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-.PHONY: clean flash boot
+include ../makefile.f1
+include ../../makefile.stm32
diff --git a/F1:F103/Canon_managing_device/Makefile.old b/F1:F103/Canon_managing_device/Makefile.old
new file mode 100644
index 0000000..2fe3391
--- /dev/null
+++ b/F1:F103/Canon_managing_device/Makefile.old
@@ -0,0 +1,151 @@
+BINARY		= canonusb
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+# MCU FAMILY
+FAMILY		?= F1
+# MCU code
+MCU			?= F103x8
+# density (stm32f10x.h, lines 70-84)
+DENSITY 	?= LD
+# change this linking script depending on particular MCU model,
+LDSCRIPT	?= stm32f103x8.ld
+# debug
+#DEFS		= -DEBUG
+
+# autoincremental version & build date
+VERSION_FILE = version.inc
+NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+INDEPENDENT_HEADERS=
+
+FP_FLAGS	?= -msoft-float -mfloat-abi=soft
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+#PREFIX		?= arm-none-eabi
+# gcc from arm web site 
+PREFIX		?= /opt/bin/arm-none-eabi
+TOOLCHLIB	?= /opt/arm-none-eabi/lib
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		:= mk
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -D__thumb2__=1 -MD -g -gdwarf-2
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow 
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -fno-stack-protector -fshort-enums
+CFLAGS		+=  $(ARCH_FLAGS)
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= -nostartfiles -nostdlib --static -Wl,--gc-sections -Wl,--print-memory-usage
+LDFLAGS     += -Wl,-Map=$(OBJDIR)/$(BINARY).map
+#LDFLAGS		+= --static --gc-sections --print-memory-usage
+LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
+LDFLAGS		+= -T$(LDSCRIPT)
+
+###############################################################################
+# Used libraries
+LDLIBS		+=  -lc -lgcc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list size
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)    
+
+clean:
+	@echo "  CLEAN"
+	@rm -rf $(OBJDIR) 2>/dev/null || true
+
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+.PHONY: clean flash boot
diff --git a/F1:F103/Canon_managing_device/canonusb.bin b/F1:F103/Canon_managing_device/canonusb.bin
index 3293b8e..e52fd19 100755
Binary files a/F1:F103/Canon_managing_device/canonusb.bin and b/F1:F103/Canon_managing_device/canonusb.bin differ
diff --git a/F1:F103/PL2303_ringbuffer/Makefile b/F1:F103/PL2303_ringbuffer/Makefile
index 1d3be00..d24a3a8 100644
--- a/F1:F103/PL2303_ringbuffer/Makefile
+++ b/F1:F103/PL2303_ringbuffer/Makefile
@@ -1,151 +1,9 @@
-BINARY		= PL2303
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-# MCU FAMILY
-FAMILY		?= F1
+BINARY      := PL2303
 # MCU code
-MCU			?= F103x8
-# density (stm32f10x.h, lines 70-84)
-DENSITY 	?= MD
+MCU         ?= F103x8
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f103x8.ld
-# debug
-#DEFS		= -DEBUG
+LDSCRIPT    ?= stm32f103x8.ld
+DEFINES     := -DSTM32F10X_MD
 
-# autoincremental version & build date
-VERSION_FILE = version.inc
-NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-INDEPENDENT_HEADERS=
-
-FP_FLAGS	?= -msoft-float -mfloat-abi=soft
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
-
-###############################################################################
-# Executables
-#PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-# don't replace ld with gcc: the binary size would be much greater!!
-LD			:= $(PREFIX)-ld
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		= $(OBJDIR)/startup.o
-OBJS 		+= $(STARTUP)
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -O2 -g -D__thumb2__=1 -MD -g -gdwarf-2
-CFLAGS		+= -Wall -Werror -Wextra -Wshadow 
-CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -fno-stack-protector -fshort-enums 
-CFLAGS		+=  $(ARCH_FLAGS)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles --static --gc-sections --print-memory-usage -specs=nano.specs 
-LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT)
-
-###############################################################################
-# Used libraries
-LDLIBS		+=  -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-all: bin list size
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST)
-	@rmdir $(OBJDIR) 2>/dev/null || true
-
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-.PHONY: clean flash boot
+include ../makefile.f1
+include ../../makefile.stm32
diff --git a/F1:F103/PL2303_ringbuffer/Makefile.old b/F1:F103/PL2303_ringbuffer/Makefile.old
new file mode 100644
index 0000000..1d3be00
--- /dev/null
+++ b/F1:F103/PL2303_ringbuffer/Makefile.old
@@ -0,0 +1,151 @@
+BINARY		= PL2303
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+# MCU FAMILY
+FAMILY		?= F1
+# MCU code
+MCU			?= F103x8
+# density (stm32f10x.h, lines 70-84)
+DENSITY 	?= MD
+# change this linking script depending on particular MCU model,
+LDSCRIPT	?= stm32f103x8.ld
+# debug
+#DEFS		= -DEBUG
+
+# autoincremental version & build date
+VERSION_FILE = version.inc
+NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+INDEPENDENT_HEADERS=
+
+FP_FLAGS	?= -msoft-float -mfloat-abi=soft
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS)
+
+###############################################################################
+# Executables
+#PREFIX		?= arm-none-eabi
+# gcc from arm web site 
+PREFIX		?= /opt/bin/arm-none-eabi
+TOOLCHLIB	?= /opt/arm-none-eabi/lib
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+# don't replace ld with gcc: the binary size would be much greater!!
+LD			:= $(PREFIX)-ld
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		:= mk
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		= $(OBJDIR)/startup.o
+OBJS 		+= $(STARTUP)
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -g -D__thumb2__=1 -MD -g -gdwarf-2
+CFLAGS		+= -Wall -Werror -Wextra -Wshadow 
+CFLAGS		+= -fno-common -ffunction-sections -fdata-sections -fno-stack-protector -fshort-enums 
+CFLAGS		+=  $(ARCH_FLAGS)
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= -nostartfiles --static --gc-sections --print-memory-usage -specs=nano.specs 
+LDFLAGS		+= -L$(LIB_DIR) -L$(TOOLCHLIB)
+LDFLAGS		+= -T$(LDSCRIPT)
+
+###############################################################################
+# Used libraries
+LDLIBS		+=  -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU) -DSTM32F10X_$(DENSITY)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+all: bin list size
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)    
+
+clean:
+	@echo "  CLEAN"
+	$(RM) $(OBJS) $(DEPS) $(ELF) $(HEX) $(LIST)
+	@rmdir $(OBJDIR) 2>/dev/null || true
+
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+.PHONY: clean flash boot
diff --git a/F1:F103/PL2303_ringbuffer/PL2303.bin b/F1:F103/PL2303_ringbuffer/PL2303.bin
index 4d080e2..ece1e8a 100755
Binary files a/F1:F103/PL2303_ringbuffer/PL2303.bin and b/F1:F103/PL2303_ringbuffer/PL2303.bin differ
diff --git a/F1:F103/makefile.f1 b/F1:F103/makefile.f1
new file mode 100644
index 0000000..bd73baf
--- /dev/null
+++ b/F1:F103/makefile.f1
@@ -0,0 +1,7 @@
+# common include for all F3 series
+# MCU FAMILY
+FAMILY		?= F1
+
+FP_FLAGS	?= -msoft-float -fsingle-precision-constant -mlittle-endian
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m3 -mfix-cortex-m3-ldrd
+
diff --git a/F3:F303/PL2303/Makefile b/F3:F303/PL2303/Makefile
index 1903586..3bd1054 100644
--- a/F3:F303/PL2303/Makefile
+++ b/F3:F303/PL2303/Makefile
@@ -1,187 +1,8 @@
-BINARY		= pl2303
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-# MCU FAMILY
-FAMILY		?= F3
+BINARY		:= pl2303
 # MCU code
-MCU			?= F303xb
-# or __ARM_ARCH_7EM__
-ARMARCH = __ARM_ARCH_7M__
+MCU			:= F303xb
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f303xB.ld
+LDSCRIPT	:= stm32f303xB.ld
 
-FP_FLAGS	?= -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -mlittle-endian -DARM_MATH_CM4
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m4
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS) -D $(ARMARCH)
-
-###############################################################################
-# Executables
-# PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-#TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-# don't replace ld with gcc: the binary size would be much greater!!
-LD			:= $(PREFIX)-ld
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-# target (debug/release)
-TARGFILE := $(OBJDIR)/TARGET
-# autoincremental version & build date
-VERSION_FILE = version.inc
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		:= $(OBJDIR)/startup.o
-MAP			:= $(OBJDIR)/$(BINARY).map
-OBJS 		+= $(STARTUP)
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -g -gdwarf-2   # debuggin symbols in listing
-CFLAGS		+= -O2 -D__thumb2__=1 -MD
-CFLAGS		+= -Wall -Wextra -Wshadow 
-CFLAGS		+= -fshort-enums -ffunction-sections -fdata-sections
-#CFLAGS		+= -fno-common -fno-stack-protector
-CFLAGS		+=  $(ARCH_FLAGS)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles --static -specs=nosys.specs -specs=nano.specs
-LDFLAGS		+= $(ARCH_FLAGS)
-LDFLAGS		+= -L$(LIB_DIR) 
-#-L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT)
-LDFLAGS		+= -Wl,-Map=$(MAP),--cref -Wl,--gc-sections -Wl,--print-memory-usage
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -lm -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-ifeq ($(shell test -e $(TARGFILE) && echo -n yes),yes)
-	TARGET := $(file < $(TARGFILE))
-else
-	TARGET := RELEASE
-endif
-
-ifeq ($(TARGET), DEBUG)
-	.DEFAULT_GOAL := debug
-endif
-
-ifeq ($(shell test -e $(VERSION_FILE) && echo -n yes), yes)
-    NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-else
-    NEXTVER := "1"
-endif
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-# release: add LTO
-release: CFLAGS += -flto
-release: LDFLAGS += -flto
-release: $(TARGFILE) bin list size
-
-#debug: add debug flags
-debug: CFLAGS += -DEBUG -Werror -g3
-debug: TARGET := DEBUG
-debug: $(TARGFILE) bin list size
-
-$(TARGFILE): $(OBJDIR)
-	@echo -e "\t\tTARGET: $(TARGET)"
-	@echo "$(TARGET)" > $(TARGFILE)
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@[ -f $(VERSION_FILE) ] || echo -e "#define BUILD_NUMBER \"0\"\n#define BUILD_DATE \"none\"" > $(VERSION_FILE)
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(CC) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	@rm -rf $(OBJDIR) 2>/dev/null || true
-
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-openocd:
-	openocd -f openocd.cfg
-
-dbg:
-	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
-
-.PHONY: size clean flash boot dfuboot openocd dbg
+include ../makefile.f3
+include ../../makefile.stm32
diff --git a/F3:F303/floatPrintf/Makefile b/F3:F303/floatPrintf/Makefile
index bc5af43..d64f032 100644
--- a/F3:F303/floatPrintf/Makefile
+++ b/F3:F303/floatPrintf/Makefile
@@ -1,187 +1,9 @@
-BINARY		= float
-BOOTPORT	?= /dev/ttyUSB0
-BOOTSPEED	?= 115200
-# MCU FAMILY
-FAMILY		?= F3
+BINARY		:= float
 # MCU code
-MCU			?= F303xb
-# or __ARM_ARCH_7EM__
-ARMARCH = __ARM_ARCH_7M__
+MCU			:= F303xb
 # change this linking script depending on particular MCU model,
-LDSCRIPT	?= stm32f303xB.ld
+LDSCRIPT	:= stm32f303xB.ld
+LDLIBS		:= -lm
 
-FP_FLAGS	?= -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -mlittle-endian -DARM_MATH_CM4
-ASM_FLAGS	?= -mthumb -mcpu=cortex-m4
-ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS) -D $(ARMARCH)
-
-###############################################################################
-# Executables
-# PREFIX		?= arm-none-eabi
-# gcc from arm web site 
-PREFIX		?= /opt/bin/arm-none-eabi
-#TOOLCHLIB	?= /opt/arm-none-eabi/lib
-RM			:= rm -f
-RMDIR		:= rmdir
-CC			:= $(PREFIX)-gcc
-# don't replace ld with gcc: the binary size would be much greater!!
-LD			:= $(PREFIX)-ld
-AR			:= $(PREFIX)-ar
-AS			:= $(PREFIX)-as
-SIZE 		:= $(PREFIX)-size
-OBJCOPY		:= $(PREFIX)-objcopy
-OBJDUMP		:= $(PREFIX)-objdump
-GDB			:= $(PREFIX)-gdb
-STFLASH		:= $(shell which st-flash)
-STBOOT		:= $(shell which stm32flash)
-DFUUTIL		:= $(shell which dfu-util)
-
-###############################################################################
-# Source files
-OBJDIR 		:= mk
-# target (debug/release)
-TARGFILE := $(OBJDIR)/TARGET
-# autoincremental version & build date
-VERSION_FILE = version.inc
-SRC			:= $(wildcard *.c)
-OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
-STARTUP		:= $(OBJDIR)/startup.o
-MAP			:= $(OBJDIR)/$(BINARY).map
-OBJS 		+= $(STARTUP)
-# dependencies: we need them to recompile files if their headers-dependencies changed
-DEPS		:= $(OBJS:.o=.d)
-
-INC_DIR ?= ../inc
-
-INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
-LIB_DIR		:= $(INC_DIR)/ld
-
-###############################################################################
-# C flags
-CFLAGS		+= -g -gdwarf-2   # debuggin symbols in listing
-CFLAGS		+= -O2 -D__thumb2__=1 -MD
-CFLAGS		+= -Wall -Wextra -Wshadow 
-CFLAGS		+= -fshort-enums -ffunction-sections -fdata-sections
-#CFLAGS		+= -fno-common -fno-stack-protector
-CFLAGS		+=  $(ARCH_FLAGS)
-
-###############################################################################
-# Linker flags
-LDFLAGS		+= -nostartfiles --static -specs=nosys.specs -specs=nano.specs
-LDFLAGS		+= $(ARCH_FLAGS)
-LDFLAGS		+= -L$(LIB_DIR) 
-#-L$(TOOLCHLIB)
-LDFLAGS		+= -T$(LDSCRIPT)
-LDFLAGS		+= -Wl,-Map=$(MAP),--cref -Wl,--gc-sections -Wl,--print-memory-usage
-
-###############################################################################
-# Used libraries
-LDLIBS		+= -lm -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
-
-DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
-
-ELF		:= $(OBJDIR)/$(BINARY).elf
-LIST	:= $(OBJDIR)/$(BINARY).list
-BIN		:= $(BINARY).bin
-HEX		:= $(BINARY).hex
-
-ifeq ($(shell test -e $(TARGFILE) && echo -n yes),yes)
-	TARGET := $(file < $(TARGFILE))
-else
-	TARGET := RELEASE
-endif
-
-ifeq ($(TARGET), DEBUG)
-	.DEFAULT_GOAL := debug
-endif
-
-ifeq ($(shell test -e $(VERSION_FILE) && echo -n yes), yes)
-    NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
-else
-    NEXTVER := "1"
-endif
-BUILDDATE := $(shell date +%Y-%m-%d)
-
-# release: add LTO
-release: CFLAGS += -flto
-release: LDFLAGS += -flto
-release: $(TARGFILE) bin list size
-
-#debug: add debug flags
-debug: CFLAGS += -DEBUG -Werror -g3
-debug: TARGET := DEBUG
-debug: $(TARGFILE) bin list size
-
-$(TARGFILE): $(OBJDIR)
-	@echo -e "\t\tTARGET: $(TARGET)"
-	@echo "$(TARGET)" > $(TARGFILE)
-
-elf: $(ELF)
-bin: $(BIN)
-hex: $(HEX)
-list: $(LIST)
-
-ifneq ($(MAKECMDGOALS),clean)
--include $(DEPS)
-endif
-
-$(OBJDIR):
-	mkdir $(OBJDIR)
-
-$(STARTUP): $(INC_DIR)/startup/vector.c
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(VERSION_FILE): *.[ch]
-	@[ -f $(VERSION_FILE) ] || echo -e "#define BUILD_NUMBER \"0\"\n#define BUILD_DATE \"none\"" > $(VERSION_FILE)
-	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
-	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
-	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
-
-#$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
-
-$(OBJDIR)/%.o: %.c
-	@echo "  CC      $<"
-	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
-
-$(BIN): $(ELF)
-	@echo "  OBJCOPY $(BIN)"
-	$(OBJCOPY) -Obinary $(ELF) $(BIN)
-
-$(HEX): $(ELF)
-	@echo "  OBJCOPY $(HEX)"
-	$(OBJCOPY) -Oihex $(ELF) $(HEX)
-
-$(LIST): $(ELF)
-	@echo "  OBJDUMP $(LIST)"
-	$(OBJDUMP) -S $(ELF) > $(LIST)
-
-$(ELF): $(OBJDIR) $(OBJS)
-	@echo "  LD      $(ELF)"
-	$(CC) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
-
-size: $(ELF)
-	$(SIZE) $(ELF)    
-
-clean:
-	@echo "  CLEAN"
-	@rm -rf $(OBJDIR) 2>/dev/null || true
-
-
-flash: $(BIN)
-	@echo "  FLASH  $(BIN)"
-	$(STFLASH) write $(BIN) 0x8000000
-
-boot: $(BIN)
-	@echo "  LOAD $(BIN) through bootloader"
-	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
-
-dfuboot: $(BIN)
-	@echo "  LOAD  $(BIN) THROUGH DFU"
-	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
-
-openocd:
-	openocd -f openocd.cfg
-
-dbg:
-	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
-
-.PHONY: size clean flash boot dfuboot openocd dbg
+include ../makefile.f3
+include ../../makefile.stm32
diff --git a/F3:F303/makefile.f3 b/F3:F303/makefile.f3
new file mode 100644
index 0000000..1203008
--- /dev/null
+++ b/F3:F303/makefile.f3
@@ -0,0 +1,7 @@
+# common include for all F3 series
+# MCU FAMILY
+FAMILY		?= F3
+# or __ARM_ARCH_7EM__
+ARMARCH = -D__ARM_ARCH_7M__
+FP_FLAGS	?= -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -mlittle-endian -DARM_MATH_CM4
+ASM_FLAGS	?= -mthumb -mcpu=cortex-m4 -march=armv7e-m
diff --git a/TODO b/TODO
index 045ca1f..716ce71 100644
--- a/TODO
+++ b/TODO
@@ -1 +1 @@
-add -flto
\ No newline at end of file
+Move everything to new Makefile structure!
diff --git a/makefile.stm32 b/makefile.stm32
new file mode 100644
index 0000000..d69ab20
--- /dev/null
+++ b/makefile.stm32
@@ -0,0 +1,176 @@
+# common include for all STM32 chips
+BOOTPORT	?= /dev/ttyUSB0
+BOOTSPEED	?= 115200
+
+ARCH_FLAGS	= $(ASM_FLAGS) $(FP_FLAGS) $(DEFINES)
+
+###############################################################################
+# Executables
+# PREFIX		?= arm-none-eabi
+# gcc from arm web site 
+PREFIX		?= /opt/bin/arm-none-eabi
+#TOOLCHLIB	?= /opt/arm-none-eabi/lib
+RM			:= rm -f
+RMDIR		:= rmdir
+CC			:= $(PREFIX)-gcc
+# don't replace ld with gcc: the binary size would be much greater!!
+LD			:= $(PREFIX)-gcc
+AR			:= $(PREFIX)-ar
+AS			:= $(PREFIX)-as
+SIZE 		:= $(PREFIX)-size
+OBJCOPY		:= $(PREFIX)-objcopy
+OBJDUMP		:= $(PREFIX)-objdump
+GDB			:= $(PREFIX)-gdb
+STFLASH		:= $(shell which st-flash)
+STBOOT		:= $(shell which stm32flash)
+DFUUTIL		:= $(shell which dfu-util)
+
+###############################################################################
+# Source files
+OBJDIR 		:= mk
+# target (debug/release)
+TARGFILE := $(OBJDIR)/TARGET
+# autoincremental version & build date
+VERSION_FILE = version.inc
+SRC			:= $(wildcard *.c)
+OBJS		:= $(addprefix $(OBJDIR)/, $(SRC:%.c=%.o))
+STARTUP		:= $(OBJDIR)/startup.o
+MAP			:= $(OBJDIR)/$(BINARY).map
+OBJS 		+= $(STARTUP)
+# dependencies: we need them to recompile files if their headers-dependencies changed
+DEPS		:= $(OBJS:.o=.d)
+
+INC_DIR ?= ../inc
+
+INCLUDE 	:= -I$(INC_DIR)/Fx -I$(INC_DIR)/cm
+LIB_DIR		:= $(INC_DIR)/ld
+
+###############################################################################
+# C flags
+CFLAGS		+= -O2 -D__thumb2__=1 -MD
+CFLAGS		+= -Wall -Wextra -Wshadow 
+CFLAGS		+= -fshort-enums -ffunction-sections -fdata-sections
+#CFLAGS		+= -fno-common -fno-stack-protector
+CFLAGS		+=  $(ARCH_FLAGS)
+
+###############################################################################
+# Linker flags
+LDFLAGS		+= -nostartfiles --static -specs=nosys.specs -specs=nano.specs
+LDFLAGS		+= $(ARCH_FLAGS)
+LDFLAGS		+= -L$(LIB_DIR) 
+#-L$(TOOLCHLIB)
+LDFLAGS		+= -T$(LDSCRIPT)
+LDFLAGS		+= -Wl,-Map=$(MAP),--cref -Wl,--gc-sections -Wl,--print-memory-usage
+
+###############################################################################
+# Used libraries
+LDLIBS		+= -lc $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+DEFS		+= -DSTM32$(FAMILY) -DSTM32$(MCU)
+
+ELF		:= $(OBJDIR)/$(BINARY).elf
+LIST	:= $(OBJDIR)/$(BINARY).list
+BIN		:= $(BINARY).bin
+HEX		:= $(BINARY).hex
+
+ifeq ($(shell test -e $(TARGFILE) && echo -n yes),yes)
+	TARGET := $(file < $(TARGFILE))
+else
+	TARGET := RELEASE
+endif
+
+ifeq ($(TARGET), DEBUG)
+	.DEFAULT_GOAL := debug
+endif
+
+ifeq ($(shell test -e $(VERSION_FILE) && echo -n yes), yes)
+    NEXTVER := $(shell expr $$(awk '/#define BUILD_NUMBER/' $(VERSION_FILE) | tr -cd "[0-9]") + 1)
+else
+    NEXTVER := "1"
+endif
+BUILDDATE := $(shell date +%Y-%m-%d)
+
+# release: add LTO
+release: CFLAGS += -flto
+release: LDFLAGS += -flto
+release: $(TARGFILE) bin list size
+
+#debug: add debug flags
+debug: CFLAGS += -DEBUG -Werror -g3 -gdwarf-2 
+debug: TARGET := DEBUG
+debug: $(TARGFILE) bin list size
+
+$(TARGFILE): $(OBJDIR)
+	@echo -e "\t\tTARGET: $(TARGET)"
+	@echo "$(TARGET)" > $(TARGFILE)
+
+elf: $(ELF)
+bin: $(BIN)
+hex: $(HEX)
+list: $(LIST)
+
+ifneq ($(MAKECMDGOALS),clean)
+-include $(DEPS)
+endif
+
+$(OBJDIR):
+	mkdir $(OBJDIR)
+
+$(STARTUP): $(INC_DIR)/startup/vector.c
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(VERSION_FILE): *.[ch]
+	@[ -f $(VERSION_FILE) ] || echo -e "#define BUILD_NUMBER \"0\"\n#define BUILD_DATE \"none\"" > $(VERSION_FILE)
+	@echo "  Generate version: $(NEXTVER) for date $(BUILDDATE)"
+	@sed -i "s/#define BUILD_NUMBER.*/#define BUILD_NUMBER \"$(NEXTVER)\"/" $(VERSION_FILE)
+	@sed -i "s/#define BUILD_DATE.*/#define BUILD_DATE \"$(BUILDDATE)\"/" $(VERSION_FILE)
+
+$(OBJDIR)/proto.o: proto.c $(VERSION_FILE)
+
+$(OBJDIR)/%.o: %.c
+	@echo "  CC      $<"
+	$(CC) $(CFLAGS) $(DEFS) $(INCLUDE) -o $@ -c $<
+
+$(BIN): $(ELF)
+	@echo "  OBJCOPY $(BIN)"
+	$(OBJCOPY) -Obinary $(ELF) $(BIN)
+
+$(HEX): $(ELF)
+	@echo "  OBJCOPY $(HEX)"
+	$(OBJCOPY) -Oihex $(ELF) $(HEX)
+
+$(LIST): $(ELF)
+	@echo "  OBJDUMP $(LIST)"
+	$(OBJDUMP) -S $(ELF) > $(LIST)
+
+$(ELF): $(OBJDIR) $(OBJS)
+	@echo "  LD      $(ELF)"
+	$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $(ELF)
+
+size: $(ELF)
+	$(SIZE) $(ELF)    
+
+clean:
+	@echo "  CLEAN"
+	@rm -rf $(OBJDIR) 2>/dev/null || true
+
+
+flash: $(BIN)
+	@echo "  FLASH  $(BIN)"
+	$(STFLASH) write $(BIN) 0x8000000
+
+boot: $(BIN)
+	@echo "  LOAD $(BIN) through bootloader"
+	$(STBOOT) -b$(BOOTSPEED) $(BOOTPORT) -w $(BIN)
+
+dfuboot: $(BIN)
+	@echo "  LOAD  $(BIN) THROUGH DFU"
+	$(DFUUTIL) -a0 -D $(BIN) -s 0x08000000
+
+openocd:
+	openocd -f openocd.cfg
+
+dbg:
+	arm-none-eabi-gdb $(ELF) -ex 'target remote localhost:3333' -ex 'monitor reset halt'
+
+.PHONY: size clean flash boot dfuboot openocd dbg