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AS = sdasz80
CC = sdcc
CPP = sdcpp

BUILD = build
INCLUDE = include
ROM_CHIP = AT28C256
TARGET = $(BUILD)/bootloader.hex

DEPFLAGS = -MP -MMD -MF$(basename $@).d -MT$@
# patsubst to fix sdcc compiler not supporting flags directly
CFLAGS = -mz80 -I$(INCLUDE) --Werror $(patsubst %,-Wp%,$(DEPFLAGS))
LDFLAGS = -mz80 --no-std-crt0\
	--code-loc 0x0100\
	--data-loc 0x8000\
	-Wl-b_GSINIT=0x80

SRC = src/crt0.asm src/crc16.c src/zbootloader.c

OBJ = $(patsubst src/%,$(BUILD)/%.rel,$(basename $(SRC)))
DEPS = $(patsubst %.rel,%.d,$(OBJ))

all : $(TARGET)

$(BUILD)/%.rel : src/%.asm
	@echo '  (AS)' $< $@
	@$(CPP) -P -I$(INCLUDE) -DASSEMBLY $< > $(basename $@).asm
	@$(AS) -g -o $@ $(basename $@).asm

$(BUILD)/%.rel : src/%.c
	@echo '  (CC)' $<
	@$(CC) $(CFLAGS) -c -o $@ $<

$(OBJ) : | $(BUILD)
$(BUILD) :
	@mkdir -p $@

.SECONDARY :
$(BUILD)/%.ihx : $(OBJ)
	@echo '  (LD)' $(OBJ)
	@$(CC) $(LDFLAGS) -o $@ $(OBJ)

$(TARGET) : $(BUILD)/bootloader.ihx
	@hex2bin.py $< $@

.PHONE : flash
flash :
	minipro -u -y -sp $(ROM_CHIP) -w $(TARGET)

.PHONY : clean
clean :
	@rm -rf $(BUILD)

-include $(DEPS)