# Hey Emacs, this is a -*- makefile -*-

#----------------------------------------------------------------------------
# WinAVR Makefile Template written by Eric B. Weddington, Joerg Wunsch, et al.
#
# Released to the Public Domain
#
# Additional material for this makefile was written by:
# Peter Fleury
# Tim Henigan
# Colin O'Flynn
# Reiner Patommel
# Markus Pfaff
# Sander Pool
# Frederik Rouleau
# Carlos Lamas
#
#
# Extensively modified for sd2iec by Ingo Korb
#
# To rebuild project do "make clean" then "make all".
#----------------------------------------------------------------------------

# Read configuration file
ifdef CONFIG
 CONFIGSUFFIX = $(CONFIG:config%=%)
else
 CONFIG = config
 CONFIGSUFFIX =
endif

# Enable verbose compilation with "make V=1"
ifdef V
 Q :=
 E := @:
else
 Q := @
 E := @echo
endif

# Include the configuration file
include $(CONFIG)

# Set MCU name and length of application binary
# Warning: BINARY_LENGTH must be a multiple of 512
MCU := $(CONFIG_MCU)
ifeq ($(MCU),atmega128)
  BINARY_LENGTH = 0x1f000
else ifeq ($(MCU),atmega1281)
  BINARY_LENGTH = 0x1f000
else ifeq ($(MCU),atmega2561)
  BINARY_LENGTH = 0x3f000
else ifeq ($(MCU),atmega644)
  BINARY_LENGTH = 0xf000
else ifeq ($(MCU),atmega644p)
  BINARY_LENGTH = 0xf000
else ifeq ($(MCU),atmega1284p)
  BINARY_LENGTH = 0x1f000
else
.PHONY: nochip
nochip:
	@echo '=============================================================='
	@echo 'No known target chip specified.'
	@echo
	@echo 'Please edit the Makefile.'
	@exit 1
endif

# Directory for all generated files
OBJDIR := obj-$(CONFIG_MCU:atmega%=m%)$(CONFIGSUFFIX)

# Output format. (can be srec, ihex, binary)
FORMAT = ihex


# Target file name (without extension).
TARGET = $(OBJDIR)/newboot

# List C source files here. (C dependencies are automatically generated.)
SRC = sdlight.c main.c ff.c

# List Assembler source files here.
#     Make them always end in a capital .S.  Files ending in a lowercase .s
#     will not be considered source files but generated files (assembler
#     output from the compiler), and will be deleted upon "make clean"!
#     Even though the DOS/Win* filesystem matches both .s and .S the same,
#     it will preserve the spelling of the filenames, and gcc itself does
#     care about how the name is spelled on its command-line.
ASRC =


# 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.)
# Use s -mcall-prologues when you really need size...
#OPT = 2
OPT = s

# Debugging format.
#     Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
#     AVR Studio 4.10 requires dwarf-2.
#     AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
DEBUG = dwarf-2


# List any extra directories to look for include files here.
#     Each directory must be seperated by a space.
#     Use forward slashes for directory separators.
#     For a directory that has spaces, enclose it in quotes.
EXTRAINCDIRS =


# 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 = -DF_CPU=$(CONFIG_MCU_FREQ)UL -DBINARY_LENGTH=$(BINARY_LENGTH)

# Place -I options here
CINCS =


# Define programs and commands.
# CC must be defined here to generate the correct CFLAGS
SHELL = sh
CC = avr-gcc
HOSTCC = gcc
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
NM = avr-nm
AVRDUDE = avrdude
REMOVE = rm -f
COPY = cp
AWK = awk
CRCGEN = crcgen-new


#---------------- Compiler Options ----------------
#  -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 = -g$(DEBUG)
CFLAGS += $(CDEFS) $(CINCS)
CFLAGS += -O$(OPT) -fno-strict-aliasing
CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
CFLAGS += -Wall -Wstrict-prototypes -Werror
#CFLAGS += -Wa,-adhlns=$(OBJDIR)/$(<:.c=.lst)
CFLAGS += -I$(OBJDIR)
CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
CFLAGS += $(CSTANDARD)
CFLAGS += -ffunction-sections -fdata-sections
CFLAGS += -mcall-prologues
#CFLAGS += --param inline-call-cost=1
CFLAGS += -finline-limit=3
CFLAGS += -fno-inline-small-functions
CFLAGS += -fno-move-loop-invariants
CFLAGS += -fno-split-wide-types
CFLAGS += -fweb


#---------------- Assembler Options ----------------
#  -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=$(OBJDIR)/$(<:.S=.lst),-gstabs -I$(OBJDIR)


#---------------- Library Options ----------------
# 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

# If this is left blank, then it will use the Standard printf version.
PRINTF_LIB =
#PRINTF_LIB = $(PRINTF_LIB_MIN)
#PRINTF_LIB = $(PRINTF_LIB_FLOAT)


# 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

# If this is left blank, then it will use the Standard scanf version.
SCANF_LIB =
#SCANF_LIB = $(SCANF_LIB_MIN)
#SCANF_LIB = $(SCANF_LIB_FLOAT)


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 =



#---------------- Linker Options ----------------
#  -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 += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
LDFLAGS += -Wl,--gc-sections
LDFLAGS += -Wl,--section-start=.text=$(BINARY_LENGTH)
LDFLAGS += -Wl,-O9,--relax



#============================================================================


# De-dupe the list of C source files
CSRC := $(sort $(SRC))

# Define all object files.
OBJ := $(patsubst %,$(OBJDIR)/%,$(CSRC:.c=.o) $(ASRC:.S=.o))

# Define all listing files.
LST := $(patsubst %,$(OBJDIR)/%,$(CSRC:.c=.lst) $(ASRC:.S=.lst))


# Compiler flags to generate dependency files.
GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d


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





# Default target.
all: build

hostbuild: crcgen-new

build: elf hex hostbuild
	$(E) "  SIZE   $(TARGET).elf"
	$(Q)$(ELFSIZE)|grep -v debug

elf: $(TARGET).elf
bin: $(TARGET).bin
hex: $(TARGET).hex
eep: $(TARGET).eep
lss: $(TARGET).lss
sym: $(TARGET).sym


# Display size of file.
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
ELFSIZE = $(SIZE) -A $(TARGET).elf
AVRMEM = avr-mem.sh $(TARGET).elf $(MCU)


# Generate autoconf.h from config
.PRECIOUS : $(OBJDIR)/autoconf.h
$(OBJDIR)/autoconf.h: $(CONFIG) | $(OBJDIR)
	$(E) "  CONF2H $(CONFIG)"
	$(Q)$(AWK) -f conf2h.awk $(CONFIG) > $(OBJDIR)/autoconf.h

# Create final output files (.hex, .eep) from ELF output file.
$(OBJDIR)/%.bin: $(OBJDIR)/%.elf
	$(E) "  BIN    $@"
	$(Q)$(OBJCOPY) -O binary -R .eeprom $< $@

$(OBJDIR)/%.hex: $(OBJDIR)/%.elf
	$(E) "  HEX    $@"
	$(Q)$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@

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

# Create extended listing file from ELF output file.
$(OBJDIR)/%.lss: $(OBJDIR)/%.elf
	$(E) "  LSS    $<"
	$(Q)$(OBJDUMP) -h -S $< > $@

# Create a symbol table from ELF output file.
$(OBJDIR)/%.sym: $(OBJDIR)/%.elf
	$(E) "  SYM    $<"
	$(E)$(NM) -n $< > $@



# Link: create ELF output file from object files.
.SECONDARY : $(TARGET).elf
.PRECIOUS : $(OBJ)
$(OBJDIR)/%.elf: $(OBJ)
	$(E) "  LINK   $@"
	$(Q)$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)


# Compile: create object files from C source files.
$(OBJDIR)/%.o : %.c | $(OBJDIR) $(OBJDIR)/autoconf.h
	$(E) "  CC     $<"
	$(Q)$(CC) -c $(ALL_CFLAGS) $< -o $@


# Compile: create assembler files from C source files.
$(OBJDIR)/%.s : %.c | $(OBJDIR) $(OBJDIR)/autoconf.h
	$(CC) -S $(ALL_CFLAGS) $< -o $@


# Assemble: create object files from assembler source files.
$(OBJDIR)/%.o : %.S | $(OBJDIR) $(OBJDIR)/autoconf.h
	$(E) "  AS     $<"
	$(Q)$(CC) -c $(ALL_ASFLAGS) $< -o $@

# Create preprocessed source for use in sending a bug report.
$(OBJDIR)/%.i : %.c | $(OBJDIR) $(OBJDIR)/autoconf.h
        $(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@

# Create the output directory
$(OBJDIR):
	$(E) "  MKDIR  $(OBJDIR)"
	$(Q)mkdir $(OBJDIR)

# Target: build host tool
crcgen-new: crcgen-new.c
	$(E) "  HOSTCC $<"
	$(Q)$(HOSTCC) -Wall -Werror -o $@ -O $<

# Target: clean project.
clean:
	$(E) "  CLEAN"
	$(Q)$(REMOVE) $(TARGET).hex
	$(Q)$(REMOVE) $(TARGET).bin
	$(Q)$(REMOVE) $(TARGET).eep
	$(Q)$(REMOVE) $(TARGET).cof
	$(Q)$(REMOVE) $(TARGET).elf
	$(Q)$(REMOVE) $(TARGET).map
	$(Q)$(REMOVE) $(TARGET).sym
	$(Q)$(REMOVE) $(TARGET).lss
	$(Q)$(REMOVE) $(OBJ)
	$(Q)$(REMOVE) $(OBJDIR)/autoconf.h
	$(Q)$(REMOVE) $(OBJDIR)/*.bin
	$(Q)$(REMOVE) $(LST)
	$(Q)$(REMOVE) $(CSRC:.c=.s)
	$(Q)$(REMOVE) $(CSRC:.c=.d)
	$(Q)$(REMOVE) crcgen-new
	$(Q)$(REMOVE) .dep/*
	$(Q)$(REMOVE) -rf codedoc
	$(Q)$(REMOVE) -rf doxyinput
	-$(Q)rmdir $(OBJDIR)

# Include the dependency files.
-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)

# Listing of phony targets.
.PHONY : all build hostbuild elf hex eep lss sym clean
