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BINARY=něco (cokoliv)
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LDSCRIPT=../stm32vl-discovery.ld
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?? LDSCRIPT=./lib-ex/ex/stm32/f1/stvldisco/stm32vl-discovery.ld
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LIBNAME= opencm3-stm32f1
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DEFS = -DSTM32F1
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FP_FLAGS = -msoft-float
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ARCH_FLAGS = -mthumb -mcpu=cortex-m3 $(FP_FLAGS) -mfix-cortex-m3-ldrd
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=> ARCH_FLAGS = -mthumb -mcpu=cortex-m3 -msoft-float -mfix-cortex-m3-ldrd
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STLINK_PORT = 4242
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### Makefile.rules
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PREFIX = arm-none-eabi
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CC = $(PREFIX)-gcc
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=> CC = arm-none-eabi-gcc
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LD = $(PREFIX)-gcc
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=> LD = arm-none-eabi-gcc
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AS = $(PREFIX)-as
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=> AS = arm-none-eabi-as
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OBJCOPY = $(PREFIX)-objcopy
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=> OBJCOPY = arm-none-eabi-objcopy
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OBJS = $(BINARY).o
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=> OBJS = fancyblink.o
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LIBPATH = ./libopencm3 ?? Prostě cesta k libopencm3
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OPENCM3_DIR = magic!! ?? složka, kde je libopencm3
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INCLUDE_DIR = $(OPENCM3_DIR)/include
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=> INCLUDE_DIR ??= ~/Dev/STM/libocm3/libocm3/include
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LIB_DIR = $(OPENCM3_DIR)/lib
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=> LIB_DIR ??= ~/Dev/STM/libocm3/libocm3/lib
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SCRIPT_DIR = $(OPENCM3_DIR)/scripts
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=> SCRIPT_DIR ??= ~/Dev/STM/libocm3/libocm3/scripts
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CFLAGS = -Os -g -Wextra -Wshadow -Wimplicit-function-declaration -Wredundant-decls -Wmissing-prototypes -fno-common -ffunction-sections -fdata-sections
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?? Většina zbytečných (-W...)
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CPPFLAGS = -MD -Wall -Wundef -I$(INCLUDE_DIR) $(DEFS)
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=> CPPFLAGS = -MD -Wall -Wundef -I~/Dev/ST/locm3/locm3/include -DSTM32F1
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LDFLAGS = --static -nostartfiles -L$(LIB_DIR) -T$(LDSCRIPT) -Wl,-Map=$(*).map -Wl,--gc-sections
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?? $(*).map prostě najít .map soubor
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=> LDFLAGS = --static -nostartfiles -L.../libocm3/lib -Tněkde/stm32vl-discovery.ld -Wl,-Map=$(*).map -Wl,--gc-sections
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LDLIBS = -l$(LIBNAME) -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
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=> LDLIBS = -lopencm3-stm32f1 -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
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>>> LET US COMPILE
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--------------------------------------------------
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To make the .o:
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===============
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$(CC) $(CFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o něco.o -c něco.c
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=> arm-none-eabi-gcc {Flagy na všechno} -c něco.c -o něco.o
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>>> Hotovo!!
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To make the elf:
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================
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$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o něco.elf
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-> vyžaduje $(OBJS), existenci $(LDSCRIPT) a $(LIB_DIR)/lib$(LIBNAME).a
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=> arm-none-eabi-gcc {hromada zbytečných LDFLAGS, ARCH_FLAGS} něco.o {LDLIBS} -o něco.elf
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-> vyžaduje vytvoření něco.o (zbytek už je v libopencm3, SNAD)
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>>> Hotovo!!
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To make the bin:
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================
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$(OBJCOPY) -Obinary něco.elf něco.bin
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=> arm-none-eabi-objcopy -Obinary něco.elf něco.bin
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>>> Hotovo!!
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