# Toolchain
CC = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy
STFLASH = st-flash

# Compiler flags
CFLAGS = -std=c99 -Wall -Wextra -Werror -g -mthumb -mcpu=cortex-m3

# Object files
OBJS = blink.o

# Output files
ELF = blink.elf
BIN = blink.bin

# Targets
.PHONY: all clean flash

all: $(BIN)

$(BIN): $(ELF)
	$(OBJCOPY) -O binary $< $@

$(ELF): $(OBJS)
	$(CC) $(CFLAGS) $^ -o $@

%.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@

clean:
	rm -f $(OBJS) $(ELF) $(BIN)

flash: $(BIN)
	$(STFLASH) --reset write $< 0x8000000