# Hey Emacs, this is a -*- makefile -*-
#
# WinARM template makefile 
# by Martin Thomas, Kaiserslautern, Germany 
# <eversmith@heizung-thomas.de>
#
# based on the WinAVR makefile written by Eric B. Weddington, Jöòg Wunsch, et al.
# Released to the Public Domain
# Please read the make user manual!
#
#
# On command line:
#
# make all = Make software.
#
# make clean = Clean out built project files.
#
# (TODO: make filename.s = Just compile filename.c into the assembler code only)
#
# To rebuild project do "make clean" then "make all".
#
# Changelog:
# - 17. Feb. 2005  - added thumb-interwork support (mth)
# - 28. Apr. 2005  - added C++ support (mth)
# - 29. Arp. 2005  - changed handling for lst-Filename (mth)
# -  1. Nov. 2005  - exception-vector placement options (mth)
# - 15. Nov. 2005  - added library-search-path (EXTRA_LIB...) (mth)
# -  2. Dec. 2005  - fixed ihex and binary file extensions (mth)
# - 22. Feb. 2006  - added AT91LIBNOWARN setting (mth)
# - 19. Apr. 2006  - option FLASH_TOOL (default lpc21isp); variable IMGEXT (mth)
# - 23. Jun. 2006  - option USE_THUMB_MODE -> THUMB/THUMB_IW
# -  3. Aug. 2006  - added -ffunction-sections -fdata-sections to CFLAGS
#                    and --gc-sections to LDFLAGS. Only available for gcc 4 (mth)
# -  4. Aug. 2006  - pass SUBMDL-define to frontend (mth)
# - 11. Nov. 2006  - FLASH_TOOL-config, TCHAIN-config (mth)
# - 28. Mar. 2007  - remove .dep-Directory with rm -r -f and force "no error"
# - 24. Aprl 2007  - added "both" option for format (.bin and .hex)

# Toolchain prefix (i.e arm-elf -> arm-elf-gcc.exe)

# -  2. Oct. 2008  - Changed for example project of FatFs moddule (chan)


# MCU name and submodel
MCU      = arm7tdmi-s
THUMB_MODE = NO
SUBMDL   = LPC2124


# Target file name (without extension).
TARGET = main

# List C source files here. (C dependencies are automatically generated.)
# use file-extension c for "c-only"-files
SRC =  main.c

# List C source files here which must be compiled in ARM-Mode.
# use file-extension c for "c-only"-files
SRCARM = 

# 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 = 

# List Assembler source files here which must be assembled in ARM-Mode..
ASRCARM = crt.S

## Output format. (can be ihex or binary or both)
## (binary i.e. for openocd and SAM-BA, hex i.e. for lpc21isp and uVision)
FORMAT = both

# 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

## Using the Atmel AT91_lib produces warning with
## the default warning-levels. 
## yes - disable these warnings; no - keep default settings
#AT91LIBNOWARN = yes
AT91LIBNOWARN = no

# 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 seperated by a space.
EXTRAINCDIRS = 

# List any extra directories to look for library files here.
#     Each directory must be seperated by a space.
EXTRA_LIBDIRS = 


# 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 for C here
RUN_MODE=ROM_RUN
CDEFS =  -D$(RUN_MODE)

# Place -D or -U options for ASM here
ADEFS =  -D$(RUN_MODE)

CDEFS += -D__WinARM__ -D__WINARMSUBMDL_$(SUBMDL)__
ADEFS += -D__WinARM__ -D__WINARMSUBMDL_$(SUBMDL)__

# Compiler flags.

ifeq ($(THUMB_MODE),YES)
THUMB    = -mthumb
THUMB_IW = -mthumb-interwork
else 
THUMB    = 
THUMB_IW = 
endif

#  -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
#
# Flags for C and C++ (arm-elf-gcc/arm-elf-g++)
CFLAGS = -g$(DEBUG)
CFLAGS += $(CDEFS) $(CINCS)
CFLAGS += $(OPT)
CFLAGS += -Wall -Wcast-align -Wimplicit
CFLAGS += -Wpointer-arith -Wswitch
CFLAGS += -ffunction-sections -fdata-sections
CFLAGS += -Wredundant-decls -Wreturn-type -Wshadow -Wunused
CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))

# flags only for C
CONLYFLAGS += -Wnested-externs 
CONLYFLAGS += $(CSTANDARD)

ifneq ($(AT91LIBNOWARN),yes)
#AT91-lib warnings with:
CFLAGS += -Wcast-qual
CONLYFLAGS += -Wstrict-prototypes
#CONLYFLAGS += -Wmissing-declarations
#CONLYFLAGS += -Wmissing-prototypes
endif

# flags only for C++ (arm-elf-g++)
# CPPFLAGS = -fno-rtti -fno-exceptions
CPPFLAGS = 

# Assembler flags.
#  -Wa,...:    tell GCC to pass this to the assembler.
#  -ahlns:     create listing
#  -g$(DEBUG): have the assembler create line number information
ASFLAGS = $(ADEFS) -Wa,-g$(DEBUG)


#Additional libraries.

# Extra libraries
#    Each library-name must be seperated by a space.
#    To add libxyz.a, libabc.a and libefsl.a: 
#    EXTRA_LIBS = xyz abc efsl
#EXTRA_LIBS = efsl
EXTRA_LIBS =

#Support for newlibc-lpc (file: libnewlibc-lpc.a)
#NEWLIBLPC = -lnewlib-lpc

MATH_LIB = -lm

# CPLUSPLUS_LIB = -lstdc++


# Linker flags.
#  -Wl,...:     tell GCC to pass this to linker.
#    -Map:      create map file
#    --cref:    add cross reference to  map file
LDFLAGS = -nostartfiles -Wl,-Map=$(TARGET).map,--cref,--gc-sections
LDFLAGS += -lc
LDFLAGS += $(NEWLIBLPC) $(MATH_LIB)
LDFLAGS += -lc -lgcc 
LDFLAGS += $(CPLUSPLUS_LIB)
LDFLAGS += $(patsubst %,-L%,$(EXTRA_LIBDIRS))
LDFLAGS += $(patsubst %,-l%,$(EXTRA_LIBS))

# Set Linker-Script Depending On Selected Memory and Controller
#LDFLAGS +=-T$(SUBMDL)-ROM.ld
LDFlAGS += -T2124_demo.cmd


# Define programs and commands.
SHELL = sh
CC = arm-elf-gcc
AR = arm-elf-ar
OBJCOPY = arm-elf-objcopy
OBJDUMP = arm-elf-objdump
SIZE = arm-elf-size
NM = arm-elf-nm
REMOVE = rm -f
REMOVEDIR = rm -f -r
COPY = cp

# Define Messages
# English
MSG_END = --------  end  --------
MSG_FLASH = Creating load file for Flash:
MSG_LST = Creating listing file
MSG_EXTENDED_LISTING = Creating Extended Listing:
MSG_SYMBOL_TABLE = Creating Symbol Table:
MSG_LINKING = Linking:
MSG_COMPILING = Compiling C:
MSG_COMPILING_ARM = "Compiling C (ARM-only):"
MSG_ASSEMBLING = Assembling:
MSG_ASSEMBLING_ARM = "Assembling (ARM-only):"
MSG_CLEANING = Cleaning project:
MSG_FORMATERROR = Can not handle output-format
MSG_LPC21_RESETREMINDER = You may have to bring the target in bootloader-mode now.

# Define all object files.
COBJ      = $(SRC:.c=.o) 
AOBJ      = $(ASRC:.S=.o)
COBJARM   = $(SRCARM:.c=.o)
AOBJARM   = $(ASRCARM:.S=.o)

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

# Compiler flags to generate dependency files.
### GENDEPFLAGS = -Wp,-M,-MP,-MT,$(*F).o,-MF,.dep/$(@F).d
GENDEPFLAGS = 

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


# Default target.
all: version build size

ifeq ($(FORMAT),ihex)
build: elf hex lst sym
hex: $(TARGET).hex
IMGEXT=hex
else 
ifeq ($(FORMAT),binary)
build: elf bin lst sym
bin: $(TARGET).bin
IMGEXT=bin
else 
ifeq ($(FORMAT),both)
build: elf hex bin lst sym
hex: $(TARGET).hex
bin: $(TARGET).bin
else 
$(error "$(MSG_FORMATERROR) $(FORMAT)")
endif
endif
endif

elf: $(TARGET).elf
lst: $(TARGET).lst 
sym: $(TARGET).sym


# Display size of file.
ELFSIZE = $(SIZE) -A $(TARGET).elf

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

# Display compiler version information.
version : 
  @$(CC) --version

# Create final output file (.hex) from ELF output file.
%.hex: %.elf
  @echo
  @echo $(MSG_FLASH) $@
  $(OBJCOPY) -O ihex $< $@

# Create final output file (.bin) from ELF output file.
%.bin: %.elf
  @echo
  @echo $(MSG_FLASH) $@
  $(OBJCOPY) -O binary $< $@

# Create extended listing file from ELF output file.
# testing: option -C
%.lst: %.elf
  @echo
  @echo $(MSG_EXTENDED_LISTING) $@
  $(OBJDUMP) -h -S -C $< > $@


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


# Link: create ELF output file from object files.
.SECONDARY : $(TARGET).elf
.PRECIOUS : $(AOBJARM) $(AOBJ) $(COBJARM) $(COBJ)
%.elf:  $(AOBJARM) $(AOBJ) $(COBJARM) $(COBJ)
  @echo
  @echo $(MSG_LINKING) $@
  $(CC) $(THUMB) $(ALL_CFLAGS) $(AOBJARM) $(AOBJ) $(COBJARM) $(COBJ) --output $@ $(LDFLAGS)

# Compile: create object files from C source files. ARM/Thumb
$(COBJ) : %.o : %.c
  @echo
  @echo $(MSG_COMPILING) $<
  $(CC) -c $(THUMB) $(ALL_CFLAGS) $(CONLYFLAGS) $< -o $@ 

# Compile: create object files from C source files. ARM-only
$(COBJARM) : %.o : %.c
  @echo
  @echo $(MSG_COMPILING_ARM) $<
  $(CC) -c $(ALL_CFLAGS) $(CONLYFLAGS) $< -o $@ 

# Compile: create assembler files from C source files. ARM/Thumb
## does not work - TODO - hints welcome
##$(COBJ) : %.s : %.c
##  $(CC) $(THUMB) -S $(ALL_CFLAGS) $< -o $@


# Assemble: create object files from assembler source files. ARM/Thumb
$(AOBJ) : %.o : %.S
  @echo
  @echo $(MSG_ASSEMBLING) $<
  $(CC) -c $(THUMB) $(ALL_ASFLAGS) $< -o $@


# Assemble: create object files from assembler source files. ARM-only
$(AOBJARM) : %.o : %.S
  @echo
  @echo $(MSG_ASSEMBLING_ARM) $<
  $(CC) -c $(ALL_ASFLAGS) $< -o $@


# Target: clean project.
clean: clean_list


clean_list :
  @echo
  @echo $(MSG_CLEANING)
  $(REMOVE) $(TARGET).hex
  $(REMOVE) $(TARGET).bin
  $(REMOVE) $(TARGET).obj
  $(REMOVE) $(TARGET).elf
  $(REMOVE) $(TARGET).map
  $(REMOVE) $(TARGET).obj
  $(REMOVE) $(TARGET).a90
  $(REMOVE) $(TARGET).sym
  $(REMOVE) $(TARGET).lnk
  $(REMOVE) $(TARGET).lst
  $(REMOVE) $(COBJ)
  $(REMOVE) $(AOBJ)
  $(REMOVE) $(COBJARM)
  $(REMOVE) $(AOBJARM)
  $(REMOVE) $(LST)
  $(REMOVE) $(SRC:.c=.s)
#  $(REMOVE) $(SRC:.c=.d)
  $(REMOVE) $(SRCARM:.c=.s)
#  $(REMOVE) $(SRCARM:.c=.d)
#  $(REMOVEDIR) .dep | exit 0


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


# Listing of phony targets.
.PHONY : all begin finish end size gccversion \
build elf hex bin lss sym clean clean_list program