Implement bootloader #137 (#142)

* Boot: switch to DFU routines. Implements #132 part 1 of 2.

* Boot: boot to DFU shortcut, hard reset USB on each boot. Implements #132 part 2 of 2.

* Deploy scripts: fix path for deploy dfu.

* Bootloader: initial version. Target_f2: rebase, update deployment scripts.

* Bootloader: cleanup, refactor switch2 proc. Readme,wiki: document bootloader.

* Wiki: deploy symlinks as files, bootloader info.

* Target_f2: valid flash size in linker script.

* Github CI: bootloader build and artifacts.

* Bootloader: rename platforms to targets.

* Bootloader: change dfu/os colors.

* disable set -e

* lint code

* add bootloader testing page

Co-authored-by: Aleksandr Kutuzov <aku@plooks.com>
Co-authored-by: aanper <mail@s3f.ru>

bootloader/Makefile

@@ -0,0 +1,97 @@
+PROJECT			= bootloader
+
+SRC_DIR			= src
+OBJ_DIR			= .obj
+
+ASM_SOURCES		= $(wildcard $(SRC_DIR)/*.s)
+C_SOURCES		= $(wildcard $(SRC_DIR)/*.c)
+CPP_SOURCES		= $(wildcard $(SRC_DIR)/*.cpp)
+
+# 
+TARGET			?= f2
+TARGET_DIR		= targets/$(TARGET)
+include			$(TARGET_DIR)/target.mk
+CFLAGS			+= -Itargets/include
+C_SOURCES		+= $(wildcard $(TARGET_DIR)/*.c)
+
+DEBUG ?= 1
+ifeq ($(DEBUG), 1)
+CFLAGS += -DDEBUG -g
+else
+CFLAGS += -DNDEBUG -Os
+endif
+
+PREFIX = arm-none-eabi-
+ifdef GCC_PATH
+CC	= $(GCC_PATH)/$(PREFIX)gcc
+CPP	= $(GCC_PATH)/$(PREFIX)g++
+AS	= $(GCC_PATH)/$(PREFIX)gcc -x assembler-with-cpp
+CP	= $(GCC_PATH)/$(PREFIX)objcopy
+SZ	= $(GCC_PATH)/$(PREFIX)size
+else
+CC	= $(PREFIX)gcc
+CPP	= $(PREFIX)g++
+AS	= $(PREFIX)gcc -x assembler-with-cpp
+CP	= $(PREFIX)objcopy
+SZ	= $(PREFIX)size
+endif
+HEX	= $(CP) -O ihex
+BIN	= $(CP) -O binary -S
+
+$(shell mkdir -p $(OBJ_DIR))
+
+OBJECTS = $(addprefix $(OBJ_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
+vpath %.c $(sort $(dir $(C_SOURCES)))
+
+OBJECTS += $(addprefix $(OBJ_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
+vpath %.s $(sort $(dir $(ASM_SOURCES)))
+
+OBJECTS += $(addprefix $(OBJ_DIR)/,$(notdir $(CPP_SOURCES:.cpp=.o)))
+vpath %.cpp $(sort $(dir $(CPP_SOURCES)))
+
+DEPS = $(OBJECTS:.o=.d)
+
+CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
+CPPFLAGS = -fno-threadsafe-statics
+
+all: $(OBJ_DIR)/$(PROJECT).elf $(OBJ_DIR)/$(PROJECT).hex $(OBJ_DIR)/$(PROJECT).bin
+
+$(OBJ_DIR)/$(PROJECT).elf: $(OBJECTS)
+	@echo "\tLD\t" $@
+	@$(CC) $(LDFLAGS) $(OBJECTS) -o $@
+	$(SZ) $@
+
+$(OBJ_DIR)/$(PROJECT).hex: $(OBJ_DIR)/$(PROJECT).elf
+	@echo "\tHEX\t" $@
+	@$(HEX) $< $@
+	
+$(OBJ_DIR)/$(PROJECT).bin: $(OBJ_DIR)/$(PROJECT).elf
+	@echo "\tBIN\t" $@
+	@$(BIN) $< $@
+
+$(OBJ_DIR)/%.o: %.c
+	@echo "\tCC\t" $@
+	@$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJ_DIR)/%.o: %.s
+	@echo "\tASM\t" $@
+	@$(AS) $(CFLAGS) -c $< -o $@
+
+$(OBJ_DIR)/%.o: %.cpp
+	@echo "\tCPP\t" $@
+	@$(CPP) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+flash: $(OBJ_DIR)/$(PROJECT).bin
+	st-flash --reset write $(OBJ_DIR)/$(PROJECT).bin $(BOOT_ADDRESS)
+
+debug:
+	st-util & arm-none-eabi-gdb -ex "PROJECT extended-remote 127.0.0.1:4242" $(OBJ_DIR)/$(PROJECT).elf
+
+clean:
+	$(RM) $(OBJ_DIR)/*
+
+zz: | clean flash
+
+zzz: | clean flash debug
+
+-include $(DEPS)