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##
## Makefile to create firmware image based on mux
##
##
# CPU model
#
MCU=attiny45
# CPU Frequency
#
F_CPU=10000000L
# Serial port used for uploading
#
SERIAL=/dev/ttyACM1
BAUD=115200
# Name of image to produce (can be arbitrary)
#
TARGET=firmware
# Toolchain and flags
#
CC=avr-gcc
CFLAGS= -g -std=gnu99 -Os -Wall -finline-functions -ffunction-sections -fdata-sections -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -mmcu=$(MCU) -DF_CPU=$(F_CPU)
LD=avr-gcc
LDFLAGS= -Wl,--gc-sections,--relax -mmcu=$(MCU)
AR=avr-ar
AS=avr-as
ASFLAGS=-mmcu=$(MCU)
OC=avr-objcopy
OCFLAGS=
OD=avr-objdump
AVRDUDE=avrdude
AVRDUDEFLAGS= -p $(MCU) -P S(SERIAL) -b 19200 -c avrisp
AVRSIZE=avr-size
# Derived variables
SOURCEDIRS=. sys
INCLUDES=. sys
SOURCES=\
$(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.c)) \
$(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.S))
OBJECTS=$(addsuffix .o, $(basename $(SOURCES)))
# Rules
all: $(TARGET).hex
$(TARGET).hex: $(TARGET).elf
$(OC) $(OCFLAGS) -O ihex -R .eeprom $< $@
$(TARGET).elf: $(OBJECTS)
$(LD) $(LDFLAGS) -o $@ $^
# Sources
%.o: %.S
$(CC) $(CFLAGS) -I$(dir $<) $(addprefix -I, $(INCLUDES)) -o $@ -c $<
%.o: %.c
$(CC) $(CFLAGS) -I$(dir $<) $(addprefix -I, $(INCLUDES)) -o $@ -c $<
# Utility rules
size: $(TARGET).hex
$(AVRSIZE) --format=avr --mcu=$(MCU) $(TARGET).elf
upload: $(TARGET).hex
$(AVRDUDE) $(AVRDUDEFLAGS) -U flash:w:$(TARGET).hex:i
clean:
@rm -f *.o
@for dir in $(SOURCEDIRS); do \
rm -f $$dir/*.o; \
rm -f $$dir/*.s-gen; \
done
@rm -f $(TARGET).hex
@rm -f $(TARGET).elf
.PHONY: clean
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