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###############################################################################
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# Makefile for the project rs485
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###############################################################################
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## General Flags
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PROJECT = rs485
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MCU = attiny2313
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TARGET = rs485.elf
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CC = avr-gcc
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## Options common to compile, link and assembly rules
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COMMON = -mmcu=$(MCU)
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## Compile options common for all C compilation units.
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CFLAGS = $(COMMON)
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CFLAGS += -Wall -gdwarf-2 -DF_CPU=3686400UL -O3 -funsigned-char -funsigned-bitfields
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CFLAGS += -MD -MP -MT $(*F).o -MF dep/$(@F).d
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## Assembly specific flags
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ASMFLAGS = $(COMMON)
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ASMFLAGS += $(CFLAGS)
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ASMFLAGS += -x assembler-with-cpp -Wa,-gdwarf2
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## Linker flags
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LDFLAGS = $(COMMON)
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LDFLAGS +=
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## Intel Hex file production flags
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HEX_FLASH_FLAGS = -R .eeprom
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HEX_EEPROM_FLAGS = -j .eeprom
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HEX_EEPROM_FLAGS += --set-section-flags=.eeprom="alloc,load"
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HEX_EEPROM_FLAGS += --change-section-lma .eeprom=0 --no-change-warnings
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## Libraries
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LIBS = -lc -lm -lprintf_flt -lprintf_min -lscanf_flt -lscanf_min
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## Objects that must be built in order to link
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OBJECTS = P232.o
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## Objects explicitly added by the user
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LINKONLYOBJECTS =
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## Build
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all: $(TARGET) rs485.hex rs485.eep size
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## Compile
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P232.o: ../P232.c
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$(CC) $(INCLUDES) $(CFLAGS) -c $<
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##Link
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$(TARGET): $(OBJECTS)
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$(CC) $(LDFLAGS) $(OBJECTS) $(LINKONLYOBJECTS) $(LIBDIRS) $(LIBS) -o $(TARGET)
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%.hex: $(TARGET)
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avr-objcopy -O ihex $(HEX_FLASH_FLAGS) $< $@
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%.eep: $(TARGET)
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-avr-objcopy $(HEX_EEPROM_FLAGS) -O ihex $< $@ || exit 0
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%.lss: $(TARGET)
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avr-objdump -h -S $< > $@
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size: ${TARGET}
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@echo
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@avr-size -C --mcu=${MCU} ${TARGET}
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## Clean target
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.PHONY: clean
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clean:
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-rm -rf $(OBJECTS) rs485.elf dep/* rs485.hex rs485.eep
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## Other dependencies
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-include $(shell mkdir dep 2>/dev/null) $(wildcard dep/*)
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