##########------------------------------------------------------########## ########## Project-specific Details ########## ########## Check these every time you start a new project ########## ##########------------------------------------------------------########## #MCU = atmega168p #MCU = atmega2560 #MCU = attiny85 MCU = atmega328p F_CPU = 1000000UL BAUD = 9600UL ## Also try BAUD = 19200 or 38400 if you're feeling lucky. ## A directory for common include files and the simple USART library. ## If you move either the current folder or the Library folder, you'll ## need to change this path to match. #LIBDIR = ../../AVR-Programming-Library #LIBDIR = /usr/lib/gcc/avr/5.4.0/ LIBDIR = /lib/avr/ ##########------------------------------------------------------########## ########## Programmer Defaults ########## ########## Set up once, then forget about it ########## ########## (Can override. See bottom of file.) ########## ##########------------------------------------------------------########## PROGRAMMER_TYPE = usbasp-clone # extra arguments to avrdude: baud rate, chip type, -F flag, etc. PROGRAMMER_ARGS = -b 9600 -B 4 -v ##########------------------------------------------------------########## ########## Program Locations ########## ########## Won't need to change if they're in your PATH ########## ##########------------------------------------------------------########## CC = avr-gcc OBJCOPY = avr-objcopy OBJDUMP = avr-objdump AVRSIZE = avr-size AVRDUDE = avrdude ##########------------------------------------------------------########## ########## Makefile Magic! ########## ########## Summary: ########## ########## We want a .hex file ########## ########## Compile source files into .elf ########## ########## Convert .elf file into .hex ########## ########## You shouldn't need to edit below. ########## ##########------------------------------------------------------########## ## The name of your project (without the .c) # TARGET = blinkLED ## Or name it automatically after the enclosing directory TARGET = $(lastword $(subst /, ,$(CURDIR))) # Object files: will find all .c/.h files in current directory # and in LIBDIR. If you have any other (sub-)directories with code, # you can add them in to SOURCES below in the wildcard statement. SOURCES=$(wildcard *.c $(LIBDIR)/*.c) OBJECTS=$(SOURCES:.c=.o) HEADERS=$(SOURCES:.c=.h) ## Compilation options, type man avr-gcc if you're curious. CPPFLAGS = -DF_CPU=$(F_CPU) -DBAUD=$(BAUD) -I. -I$(LIBDIR) CFLAGS = -Os -g -std=gnu99 -Wall ## Use short (8-bit) data types CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums ## Splits up object files per function CFLAGS += -ffunction-sections -fdata-sections LDFLAGS = -Wl,-Map,$(TARGET).map ## Optional, but often ends up with smaller code LDFLAGS += -Wl,--gc-sections ## Relax shrinks code even more, but makes disassembly messy ## LDFLAGS += -Wl,--relax ## LDFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm ## for floating-point printf ## LDFLAGS += -Wl,-u,vfprintf -lprintf_min ## for smaller printf TARGET_ARCH = -mmcu=$(MCU) ## Explicit pattern rules: ## To make .o files from .c files %.o: %.c $(HEADERS) Makefile $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<; $(TARGET).elf: $(OBJECTS) $(CC) $(LDFLAGS) $(TARGET_ARCH) $^ $(LDLIBS) -o $@ %.hex: %.elf $(OBJCOPY) -j .text -j .data -O ihex $< $@ %.eeprom: %.elf $(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@ %.lst: %.elf $(OBJDUMP) -S $< > $@ ## These targets don't have files named after them .PHONY: all disassemble disasm eeprom size clean squeaky_clean flash fuses all: $(TARGET).hex debug: @echo @echo "Source files:" $(SOURCES) @echo "MCU, F_CPU, BAUD:" $(MCU), $(F_CPU), $(BAUD) @echo # Optionally create listing file from .elf # This creates approximate assembly-language equivalent of your code. # Useful for debugging time-sensitive bits, # or making sure the compiler does what you want. disassemble: $(TARGET).lst disasm: disassemble # Optionally show how big the resulting program is size: $(TARGET).elf $(AVRSIZE) -C --mcu=$(MCU) $(TARGET).elf clean: rm -f $(TARGET).elf $(TARGET).hex $(TARGET).obj \ $(TARGET).o $(TARGET).d $(TARGET).eep $(TARGET).lst \ $(TARGET).lss $(TARGET).sym $(TARGET).map $(TARGET)~ \ $(TARGET).eeprom squeaky_clean: rm -f *.elf *.hex *.obj *.o *.d *.eep *.lst *.lss *.sym *.map *~ *.eeprom ##########------------------------------------------------------########## ########## Programmer-specific details ########## ########## Flashing code to AVR using avrdude ########## ##########------------------------------------------------------########## flash: $(TARGET).hex $(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$< ## An alias program: flash flash_eeprom: $(TARGET).eeprom $(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$< avrdude_terminal: $(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt ## If you've got multiple programmers that you use, ## you can define them here so that it's easy to switch. ## To invoke, use something like `make flash_arduinoISP` flash_usbtiny: PROGRAMMER_TYPE = usbtiny flash_usbtiny: PROGRAMMER_ARGS = # USBTiny works with no further arguments flash_usbtiny: flash flash_usbasp: PROGRAMMER_TYPE = usbasp flash_usbasp: PROGRAMMER_ARGS = # USBasp works with no further arguments flash_usbasp: flash flash_arduinoISP: PROGRAMMER_TYPE = avrisp flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P /dev/ttyACM0 ## (for windows) flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P com5 flash_arduinoISP: flash flash_109: PROGRAMMER_TYPE = avr109 flash_109: PROGRAMMER_ARGS = -b 9600 -P /dev/ttyUSB0 flash_109: flash ##########------------------------------------------------------########## ########## Fuse settings and suitable defaults ########## ##########------------------------------------------------------########## ## Mega 48, 88, 168, 328 default values LFUSE = 0x62 # HFUSE = 0xdf #High fuses EFUSE = 0x00 # ## ATtiny85 Settings #LFUSE = 0x62 #HFUSE = 0xdf #EFUSE = 0xff ## Generic FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m fuses: $(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) \ $(PROGRAMMER_ARGS) $(FUSE_STRING) show_fuses: $(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nv ## Called with no extra definitions, sets to defaults set_default_fuses: FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m set_default_fuses: fuses ## Set the fuse byte for full-speed mode ## Note: can also be set in firmware for modern chips set_fast_fuse: LFUSE = 0xE2 set_fast_fuse: FUSE_STRING = -U lfuse:w:$(LFUSE):m set_fast_fuse: fuses ## Set the EESAVE fuse byte to preserve EEPROM across flashes set_eeprom_save_fuse: HFUSE = 0xD7 set_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m set_eeprom_save_fuse: fuses ## Clear the EESAVE fuse byte clear_eeprom_save_fuse: FUSE_STRING = -U hfuse:w:$(HFUSE):m clear_eeprom_save_fuse: fuses