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# Paths: default pathnames if they are not

# passed on from parent Makefile.

ifndef TARGET

TARGET = main

endif

ifndef LIBDIR

LIBDIR = ../../../avr-lib

endif

ifndef SRCDIR

SRCDIR = ../src

endif

ifndef BIOSDIR

BIOSDIR = ../bios

endif

ifndef CFGDIR

CFGDIR = ..

endif

include $(CFGDIR)/bios.inc

# VPATH: setup search path for source files.

vpath

vpath %.c $(LIBDIR):$(SRCDIR)

# List source files here. (C dependencies are automatically generated.)

SOURCES =	main.c\

			drivers/timer/timer.c\

			drivers/uart/serial.c\

			drivers/uart/uart.c\

			drivers/mcu/mcu.c\

			drivers/can/mcp2515/mcp2515.c\

# Optimization level, can be [0, 1, 2, 3, s]. 

# 0 = turn off optimization. s = optimize for size.

# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)

OPT = s

#OPT = 3

# 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

#DEBUG = dwarf-2

# List any extra directories to look for include files here.

# Each directory must be separated by a space.

EXTRAINCDIRS = $(LIBDIR) $(BIOSDIR) $(LIBDIR)/bios

# 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 =

# Compiler flags.

#  -g*:          generate debugging information

#  -O*:          optimization level

#  -f...:        tuning, see GCC manual and avr-libc documentation

#  -Wall...:     warning level

#  -Wa,...:      tell GCC to pass this to the assembler.

#    -adhlns...: create assembler listing

CFLAGS = -mmcu=$(MCU) -I.

CFLAGS += -g$(DEBUG)

CFLAGS += $(CDEFS) $(CINCS)

CFLAGS += -O$(OPT)

CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums

CFLAGS += -Wall -Wstrict-prototypes

CFLAGS += -Wa,-adhlns=$(@:.o=.lst)

CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))

CFLAGS += $(CSTANDARD)

CFLAGS += $(GENDEPFLAGS)

# Assembler flags.

#  -Wa,...:   tell GCC to pass this to the assembler.

#  -ahlms:    create listing

#  -gstabs:   have the assembler create line number information; note that

#             for use in COFF files, additional information about filenames

#             and function names needs to be present in the assembler source

#             files -- see avr-libc docs [FIXME: not yet described there]

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

ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp

ASFLAGS += -Wa,-adhlns=$(@:.o=.lst),-g$(DEBUG)

#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,-Tdata=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 =

BIOSOPTS = -Wl,-L$(BIOSDIR),-Tdata,$(BIOS_RAM_END) -lbios

# Linker flags.

#  -Wl,...:     tell GCC to pass this to linker.

#    -Map:      create map file

#    --cref:    add cross reference to  map file

LDFLAGS = -Wl,-Map=$(TARGET).map,--cref

LDFLAGS += $(EXTMEMOPTS)

LDFLAGS += $(BIOSOPTS)

LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)

# ---------------------------------------------------------------------------

# Define programs and commands.

SHELL = sh

CC = avr-gcc

AWK = awk

OBJCOPY = avr-objcopy

OBJDUMP = avr-objdump

SIZE = avr-size

NM = avr-nm

RM = rm -f

CP = cp

MKDIR = mkdir

# Define Messages

# English

MSG_ERRORS_NONE = Errors: none

MSG_BEGIN = -------- begin --------

MSG_END = --------  end  --------

MSG_SIZE_BEFORE = Size before: 

MSG_SIZE_AFTER = Size after:

MSG_COFF = Converting to AVR COFF:

MSG_EXTENDED_COFF = Converting to AVR Extended COFF:

MSG_FLASH = Creating load file for Flash:

MSG_EEPROM = Creating load file for EEPROM:

MSG_EXTENDED_LISTING = Creating Extended Listing:

MSG_SYMBOL_TABLE = Creating Symbol Table:

MSG_LINKING = Linking:

MSG_COMPILING = Compiling:

MSG_ASSEMBLING = Assembling:

MSG_DEPEND = Generating dependencies:

MSG_CLEANING = Cleaning project:

MSG_CREATE = Creating:

# Define all object files.

OBJ = $(filter %.o,$(SOURCES:.c=.o) $(SOURCES:.S=.o))

# Define all listing files.

LST = $(OBJ:.o=.lst)

# Define all dependency files.

DEP = $(OBJ:.o=.d)

BUILDDIRS = $(sort $(filter-out ./,$(dir $(OBJ))))

BIOS_RAM_END := $(shell $(AWK) '/0x[0-9a-f]+.*__bios_ram_end/ { print $$1 }' $(BIOSDIR)/bios.map)

# Compiler flags to generate dependency files.

GENDEPFLAGS = -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@:%.o=%.d)"

# Default target.

all: sizebefore buildtree config.h build sizeafter

build: elf hex eep lss sym

elf: $(TARGET).elf

hex: $(TARGET).hex

eep: $(TARGET).eep

lss: $(TARGET).lss 

sym: $(TARGET).sym

buildtree: $(BUILDDIRS)

# Display size of file.

HEXSIZE = $(SIZE) --target=ihex $(TARGET).hex

ELFSIZE = $(SIZE) $(TARGET).elf

sizebefore:

	@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi

sizeafter:

	@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi

# Generate config.h from bios.inc and config.inc

config.h: $(CFGDIR)/bios.inc $(CFGDIR)/config.inc

	@echo Generating $@

	@echo "/* This file is automatically generated. Do not edit. */" > $@

	@echo "" >> $@

	@cat $^ | $(AWK) 'BEGIN { FS="="; print "#ifndef CONFIG_H_\n#define CONFIG_H_\n" } /^[^#].*=.*/ { print "#define "$$1,$$2 } END { print "\n#endif /*CONFIG_H_*/" }' >> $@

$(CFGDIR)/config.inc: $(SRCDIR)/config.inc.template

	@if [ ! -f $@ ]; then cp $< $@; fi

# Display compiler version information.

gccversion : 

	@$(CC) --version

# 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: $(TARGET).elf

	@echo $(MSG_COFF) $(TARGET).cof

	@$(COFFCONVERT) -O coff-avr $< $(TARGET).cof

extcoff: $(TARGET).elf

	@echo $(MSG_EXTENDED_COFF) $(TARGET).cof

	@$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof

# Create final output files (.hex, .eep) from ELF output file.

%.hex: %.elf

	@echo $(MSG_FLASH) $@

	@$(OBJCOPY) -j .text -j .data -O ihex $< $@

%.eep: %.elf

	@echo $(MSG_EEPROM) $@

	-@$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \

	--change-section-lma .eeprom=0 -O ihex $< $@

# Create extended listing file from ELF output file.

%.lss: %.elf

	@echo $(MSG_EXTENDED_LISTING) $@

	@$(OBJDUMP) -h -S $< > $@

# Create a symbol table from ELF output file.

%.sym: %.elf

	@echo $(MSG_SYMBOL_TABLE) $@

	@$(NM) -n $< > $@

# Link: create ELF output file from object files.

.SECONDARY : $(TARGET).elf

.PRECIOUS : $(OBJ)

# GCC bug workaround:

# The compiler driver adds '-Tdata 0x800100' to the ld command line for some

# AVRs, making it impossible to override the .data placement with a

# subsequent -Tdata option. Detect the broken case and re-run ld with the

# correct .data location substituted.

%.elf: $(OBJ)

	@echo $(MSG_LINKING) $@

	@eval $$($(CC) -v $(CFLAGS) -o $@ $^ $(LDFLAGS) 2>&1 | $(AWK) '{ if (gsub("0x800100","$(BIOS_RAM_END)") == 1) print }')

# Compile: create object files from C source files.

%.o : %.c

	@echo $(MSG_COMPILING) $<

	@$(CC) -c $(CFLAGS) $< -o $@ 

# Compile: create assembler files from C source files.

%.s : %.c

	@$(CC) -S $(CFLAGS) $< -o $@

# Assemble: create object files from assembler source files.

%.o : %.S

	@echo $(MSG_ASSEMBLING) $<

	$(CC) -c $(ASFLAGS) $< -o $@

# Depends: create dependency files from c source files.

#%.d : %.c | $(BUILDDIRS)

#	@echo $(MSG_DEPEND) $<

#	@$(CC) -c $(CFLAGS) $(GENDEPFLAGS) $<

# Buildtree: create directories for output files.

$(BUILDDIRS) :

	@echo $(MSG_CREATE) $@

	@$(MKDIR) -p $@

# Target: clean project.

clean: 

	@echo $(MSG_CLEANING)

	$(RM) $(TARGET).hex

	$(RM) $(TARGET).eep

	$(RM) $(TARGET).cof

	$(RM) $(TARGET).elf

	$(RM) $(TARGET).map

	$(RM) $(TARGET).sym

	$(RM) $(TARGET).lss

	$(RM) $(OBJ)

	$(RM) $(DEP)

	$(RM) $(LST)

	$(RM) config.h

distclean: clean

	$(RM) -r $(BUILDDIRS)

# Include the dependency files.

ifneq ($(MAKECMDGOALS),clean)

ifneq ($(strip $(DEP)),)

-include $(DEP)

endif

endif

# Listing of phony targets.

.PHONY : all sizebefore sizeafter build \

elf hex eep lss sym coff extcoff clean \

distclean gccversion