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MakefileAVR.mk
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MakefileAVR.mk
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##########------------------------------------------------------##########
########## Project-specific Details ##########
########## Check these every time you start a new project ##########
##########------------------------------------------------------##########
MCU = atmega168
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 = /home/pi/code/AVR-Programming/AVR-Programming-Library
##########------------------------------------------------------##########
########## Programmer Defaults ##########
########## Set up once, then forget about it ##########
########## (Can override. See bottom of file.) ##########
##########------------------------------------------------------##########
PROGRAMMER_TYPE = avrisp
# extra arguments to avrdude: baud rate, chip type, -F flag, etc.
PROGRAMMER_ARGS = -b 19200 -P /dev/ttyACM0
##########------------------------------------------------------##########
########## 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 src/*.c src/**/*.c $(LIBDIR)/*.c)
OBJECTS=$(SOURCES:.c=.o)
HEADERS=$(wildcard include/**/*.h $(LIBDIR)/*.h)
## Compilation options, type man avr-gcc if you're curious.
CPPFLAGS = -DF_CPU=$(F_CPU) -DBAUD=$(BAUD) -I. -Iinclude -I$(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) $(PROGRAMMER_ARGS) -nt
## If you've got multiple programmers that you use,
## you can define them here so that it's easy to switch.
## To invoke, use something like `make flash_arduinoISP`
flash_usbtiny: PROGRAMMER_TYPE = usbtiny
flash_usbtiny: PROGRAMMER_ARGS = # USBTiny works with no further arguments
flash_usbtiny: flash
flash_usbasp: PROGRAMMER_TYPE = usbasp
flash_usbasp: PROGRAMMER_ARGS = # USBasp works with no further arguments
flash_usbasp: flash
flash_arduinoISP: PROGRAMMER_TYPE = avrisp
flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P /dev/ttyACM0
## (for windows) flash_arduinoISP: PROGRAMMER_ARGS = -b 19200 -P com5
flash_arduinoISP: flash
flash_109: PROGRAMMER_TYPE = avr109
flash_109: PROGRAMMER_ARGS = -b 9600 -P /dev/ttyUSB0
flash_109: flash
##########------------------------------------------------------##########
########## Fuse settings and suitable defaults ##########
##########------------------------------------------------------##########
## Mega 48, 88, 168, 328 default values
LFUSE = 0x62
HFUSE = 0xdf
EFUSE = 0x00
## Generic
FUSE_STRING = -U lfuse:w:$(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