Makefile for arm embedded

Makefile

TARGET=firmware
SOURCES=$(wildcard src/*.c)
LIBPATH=lib
LIBS=nosys
LDSCRIPTS=link.ld
SPECS=rdimon
OUT=out

OBJECTS=$(addprefix $(OUT)/, $(patsubst %.c, %.o, $(SOURCES)))
TARGET_ELF=$(addsuffix .elf, $(addprefix $(OUT)/, $(TARGET)))

CROSS=arm-none-eabi-
CC=$(CROSS)gcc
LD=$(CROSS)gcc

ARCH_FLAGS=-mcpu=cortex-m3 -mthumb

CFLAGS=$(ARCH_FLAGS) -Og -g3

LDFLAGS=$(ARCH_FLAGS)
LDFLAGS+=-nostartfiles
LDFLAGS+=$(addprefix -L, $(LIBPATH))
LDFLAGS+=$(addprefix -l, $(LIBS))
LDFLAGS+=$(addprefix -T, $(LDSCRIPTS))
LDFLAGS+=$(addsuffix .specs, $(addprefix -specs=, $(SPECS)))

ifeq ($(VERBOSE),y)
Q=
else
Q=@
endif

all: $(TARGET_ELF)

$(OUT)/%.o: %.c
	@echo CC $<
	@mkdir -p $(dir $@)
	$(Q)$(CC) $(CFLAGS) -o $@ -c $<

$(TARGET_ELF): $(OBJECTS)
	@echo LD $@
	@mkdir -p $(dir $@)
	$(Q)$(LD) -o $@ $^ $(LDFLAGS)

clean:
	@echo CLEAN
	$(Q)rm -fr $(OUT)

.PHONY: all clean

OOCD=openocd

OOCD_FLAGS:=-f interface/stlink.cfg -f target/stm32f1x.cfg

OOCD_CMDS:=-c "init"
OOCD_CMDS+=-c "reset halt"
OOCD_CMDS+=-c "program $(TARGET_ELF) verify reset exit"

OOCD_RUN_CMDS:=-c "init"
OOCD_RUN_CMDS+=-c "reset halt"
OOCD_RUN_CMDS+=-c "program $(TARGET_ELF) verify"
OOCD_RUN_CMDS+=-c "reset halt"
OOCD_RUN_CMDS+=-c "arm semihosting enable"
OOCD_RUN_CMDS+=-c "echo ---------------------------------------------------"
OOCD_RUN_CMDS+=-c "resume"

program: $(TARGET_ELF)
	$(Q)$(OOCD) $(OOCD_FLAGS) $(OOCD_CMDS)

run: $(TARGET_ELF)
	$(Q)$(OOCD) -d0 $(OOCD_FLAGS) $(OOCD_RUN_CMDS)