AVR based RC5 decoder (subwoofer-switch)
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1.8 KiB

CC := avr-gcc
LD := avr-ld
OBJCOPY := avr-objcopy
OBJDUMP := avr-objdump
SIZE := avr-size
TARGET = rc5switch
SOURCE = $(wildcard *.c)
BUILD_DIR = build
AVRDUDE_PROG := -c avr910 -b 115200 -P /dev/ispprog
#AVRDUDE_PROG := -c dragon_isp -P usb
MCU = attiny24
# no self programming, 2.7V BOD, 8MHz internal RC Osz.
AVRDUDE_FUSES=lfuse:w:0xc2:m hfuse:w:0xdd:m efuse:w:0xff:m
# ---------------------------------------------------------------------------
CFLAGS = -pipe -g -Os -mmcu=$(MCU) -Wall -fdata-sections -ffunction-sections
CFLAGS += -Wa,-adhlns=$(BUILD_DIR)/$(*D)/$(*F).lst -MMD -MP -MF $(BUILD_DIR)/$(*D)/$(*F).d
LDFLAGS = -Wl,-Map,$(@:.elf=.map),--cref,--relax,--gc-sections
# ---------------------------------------------------------------------------
@$(SIZE) -B -x --mcu=$(MCU) $<
$(BUILD_DIR)/$(TARGET).elf: $(patsubst %,$(BUILD_DIR)/%,$(SOURCE:.c=.o))
@echo " Linking file: $@"
@$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
@$(OBJDUMP) -h -S $@ > $(@:.elf=.lss)
@$(OBJCOPY) -j .text -j .data -O ihex $@ $(@:.elf=.hex)
@$(OBJCOPY) -j .text -j .data -O binary $@ $(@:.elf=.bin)
@$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $@ $(@:.elf=_eeprom.hex)
@$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O binary $@ $(@:.elf=_eeprom.bin)
@echo " Building file: $<"
@$(shell test -d $(BUILD_DIR)/$(*D) || mkdir -p $(BUILD_DIR)/$(*D))
@$(CC) $(CFLAGS) -o $@ -c $<
include $(shell find $(BUILD_DIR) -name \*.d 2> /dev/null)
rm -rf $(BUILD_DIR)
install: $(BUILD_DIR)/$(TARGET).elf
avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) -U flash:w:$(<:.elf=.hex) -U eeprom:w:$(<:.elf=_eeprom.hex)
avrdude $(AVRDUDE_PROG) -p $(AVRDUDE_MCU) $(patsubst %,-U %, $(AVRDUDE_FUSES))