Makefile

# Hey Emacs, this is a -*- makefile -*-
#----------------------------------------------------------------------------
# AVR-GCC Makefile template, derived from the WinAVR template (public domain)
#
# --------------------------------- WARNING ---------------------------------
# Running "make fuses" can and will brick your AVR if you are not careful
# To avoid this I recommend consulting http://www.engbedded.com/fusecalc
#
# ---------------------------------------------------------------------------
# On command line:
#
# make all = Make software.
#
# make clean = Clean out built project files.
#
# make coff = Convert ELF to AVR COFF.
#
# make extcoff = Convert ELF to AVR Extended COFF.
#
# make fuses = Burn the fuses using avrdude.
#              Please customize the avrdude fuse settings below first!
#
# make program = Download the hex file to the device, using avrdude.
#                Please customize the avrdude settings below first!
#
# make debug = Start either simulavr or avarice as specified for debugging,
#              with avr-gdb or avr-insight as the front end for debugging.
#
# make filename.s = Just compile filename.c into the assembler code only.
#
# make filename.i = Create a preprocessed source file for use in submitting
#                   bug reports to the GCC project.
#
# To rebuild project do "make clean" then "make all".
# ---------------------------------------------------------------------------


MCU = atmega16
FCPU = 16000000UL
FORMAT = ihex
TARGET = OCore-avr
SRC_DIR = ./
SRC = $(shell find $(SRC_DIR) -name *.cpp -or -name *.c -or -name *.s)
ASRC =
OPT = s

# Name of this Makefile (used for "make depend").
MAKEFILE = Makefile

# Debugging format.
# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
DEBUG = stabs

# Compiler flag to set the C Standard level.
# c89   - "ANSI" C
# gnu89 - c89 plus GCC extensions
# c99   - ISO C99 standard (not yet fully implemented)
# gnu99 - c99 plus GCC extensions
CSTANDARD = -std=gnu99

# Place -D or -U options here
CDEFS =

# Place -I options here
CINCS = -I ./


CDEBUG = -g$(DEBUG)
CWARN = -Wall -Wstrict-prototypes
CTUNING = -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -ffunction-sections -fdata-sections
#CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
CFLAGS = $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CWARN) $(CTUNING) $(CSTANDARD) $(CEXTRA)


#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst)


#Additional libraries.

# Minimalistic printf version
PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min

# Floating point printf version (requires MATH_LIB = -lm below)
PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt

PRINTF_LIB =

# Minimalistic scanf version
SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min

# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt

SCANF_LIB =

MATH_LIB = -lm

# External memory options

# 64 KB of external RAM, starting after internal RAM (ATmega128!),
# used for variables (.data/.bss) and heap (malloc()).
#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff

# 64 KB of external RAM, starting after internal RAM (ATmega128!),
# only used for heap (malloc()).
#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff

EXTMEMOPTS =

LDMAP = -Wl,-Map=build/$(TARGET).map -Wl,--gc-sections,--cref
LDFLAGS = $(EXTMEMOPTS) $(LDMAP) $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)


# Programming support using avrdude. Settings and variables.
AVRDUDE_PROGRAMMER = usbasp
AVRDUDE_PORT = 

AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
AVRDUDE_WRITE_FUSES = -U lfuse:w:e2:m -U hfuse:w:df:m -U efuse:w:ff:m


# Uncomment the following if you want avrdude's erase cycle counter.
# Note that this counter needs to be initialized first using -Yn,
# see avrdude manual.
#AVRDUDE_ERASE_COUNTER = -y

# Uncomment the following if you do /not/ wish a verification to be
# performed after programming the device.
#AVRDUDE_NO_VERIFY = -V

# Increase verbosity level.  Please use this when submitting bug
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
# to submit bug reports.
#AVRDUDE_VERBOSE = -v -v

AVRDUDE_BASIC = -p $(MCU) -c $(AVRDUDE_PROGRAMMER)
AVRDUDE_FLAGS = $(AVRDUDE_BASIC) $(AVRDUDE_NO_VERIFY) $(AVRDUDE_VERBOSE) $(AVRDUDE_ERASE_COUNTER)


CC = avr-gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
NM = avr-nm
AVRDUDE = avrdude
REMOVE = rm -f
MV = mv -f

# Use AVR-size to compute program and data size
ELFSIZE = $(SIZE) -d -C --mcu=$(MCU) build/$(TARGET).elf

# Define all object files.
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)

# Define all listing files.
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)

# Combine all necessary flags and optional flags.
# Add target processor to flags.
ALL_CFLAGS = -mmcu=$(MCU) -DF_CPU=$(FCPU) $(CFLAGS)
ALL_ASFLAGS = -mmcu=$(MCU) -DF_CPU=$(FCPU) -x assembler-with-cpp $(ASFLAGS)


# Default target.
all: build sizeafter

build: elf hex eep

elf: build/$(TARGET).elf
hex: build/$(TARGET).hex
eep: build/$(TARGET).eep
lss: build/$(TARGET).lss
sym: build/$(TARGET).sym

# Display size of file.
sizeafter:
	@if [ -f build/$(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi

# Burn the fuses.
fuses:
	$(AVRDUDE) $(AVRDUDE_BASIC) $(AVRDUDE_WRITE_FUSES)

# Program the device.
program: build/$(TARGET).hex build/$(TARGET).eep
	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)

# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
COFFCONVERT=$(OBJCOPY) --debugging \
--change-section-address .data-0x800000 \
--change-section-address .bss-0x800000 \
--change-section-address .noinit-0x800000 \
--change-section-address .eeprom-0x810000

coff: build/$(TARGET).elf
	$(COFFCONVERT) -O coff-avr build/$(TARGET).elf build/$(TARGET).coff


extcoff: build/$(TARGET).elf
	$(COFFCONVERT) -O coff-ext-avr build/$(TARGET).elf build/$(TARGET).coff


.SUFFIXES: .elf .hex .eep .lss .sym

.elf.hex:
	$(OBJCOPY) -O $(FORMAT) -R .eeprom -R .fuse -R .lock $< $@

.elf.eep:
	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
	--change-section-lma .eeprom=0 -O $(FORMAT) $< $@

# Create extended listing file from ELF output file.
.elf.lss:
	$(OBJDUMP) -h -S $< > $@

# Create a symbol table from ELF output file.
.elf.sym:
	$(NM) -n $< > $@



# Link: create ELF output file from object files.
build/$(TARGET).elf: $(OBJ) dir
	$(CC) $(ALL_CFLAGS) $(OBJ) --output build/$(TARGET).elf $(LDFLAGS)


# Compile: create object files from C source files.
.c.o:
	$(CC) -c $(ALL_CFLAGS) $< -o $@


# Compile: create assembler files from C source files.
.c.s:
	$(CC) -S $(ALL_CFLAGS) $< -o $@


# Assemble: create object files from assembler source files.
.S.o:
	$(CC) -c $(ALL_ASFLAGS) $< -o $@

# Create build directory
dir:

	mkdir -p build


# Target: clean project.
clean:
	$(REMOVE) build/$(TARGET).hex build/$(TARGET).eep build/$(TARGET).coff build/$(TARGET).elf \
	build/$(TARGET).map build/$(TARGET).sym build/$(TARGET).lss \
	$(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d)

depend:
	if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \
	then \
		sed -e '/^# DO NOT DELETE/,$$d' $(MAKEFILE) > \
			$(MAKEFILE).$$$$ && \
		$(MV) $(MAKEFILE).$$$$ $(MAKEFILE); \
	fi
	echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \
		>> $(MAKEFILE); \
	$(CC) -M -mmcu=$(MCU) $(CDEFS) $(CINCS) $(SRC) $(ASRC) >> $(MAKEFILE)

.PHONY:	all build elf hex eep lss sym program coff extcoff clean depend