Makefile

# Toolchain prefix (arm-elf- -> arm-elf-gcc.exe)
TCHAIN_PREFIX = arm-none-eabi-

# YES enables -mthumb option to flags for source-files listed 
# in SRC and CPPSRC and -mthumb-interwork option for all source
USE_THUMB_MODE = YES
#USE_THUMB_MODE = NO

# MCU name and submodel
# - MCU used for compiler-option (-mcpu)
# - SUBMDL used for linker-script name (-T) and passed as define
MCU      = cortex-m3
CHIP     = LPC1768

# *** This example only supports "FLASH_RUN" ***
# RUN_MODE is passed as define and used for the linker-script filename,
# the user has to implement the necessary operations for 
# the used mode (i.e. no copy of .data, remapping...)
# Create FLASH-Image
RUN_MODE=FLASH_RUN
# Create RAM-Image
#RUN_MODE=RAM_RUN

# *** This example only supports "VECT_TAB_FLASH" ***
# Exception-vectors placement option is just passed as define,
# the user has to implement the necessary operations (i.e. remapping)
# Exception vectors in FLASH:
VECTOR_TABLE_LOCATION=VECT_TAB_FLASH
# Exception vectors in RAM:
#VECTOR_TABLE_LOCATION=VECT_TAB_RAM

# Directory for output files (lst, obj, dep, elf, sym, map, hex, bin etc.)
OUTDIR = $(RUN_MODE)

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

# Utility variables
APPLIBDIR    = ./Libraries
NXPDIR       = $(APPLIBDIR)/NXP
NXPDRVDIR    = $(NXPDIR)/Drivers
NXPDRVSRCDIR = $(NXPDRVDIR)/source
NXPDRVINCDIR = $(NXPDRVDIR)/include
CMSISCOREDIR = $(NXPDIR)/Core/CM3/CoreSupport
CMSISDEVDIR  = $(NXPDIR)/Core/CM3/DeviceSupport/NXP/LPC17xx
LWIPDIR      = $(APPLIBDIR)/lwip-1.4.0

# List C source files here. (C dependencies are automatically generated.)
# use file-extension c for "c-only"-files
## Demo-Application:
SRC = main.c clock-arch.c rtc_cal.c comm.c monitor.c syscalls.c

## CMSIS
SRC += $(CMSISCOREDIR)/core_cm3.c
SRC += $(CMSISDEVDIR)/system_LPC17xx.c
## used parts of the NXP-Library
#SRC += $(NXPDRVSRCDIR)/lpc17xx_nvic.c
SRC += $(NXPDRVSRCDIR)/lpc17xx_clkpwr.c
SRC += $(NXPDRVSRCDIR)/lpc17xx_pinsel.c
SRC += $(NXPDRVSRCDIR)/lpc17xx_gpio.c
SRC += $(NXPDRVSRCDIR)/lpc17xx_uart.c
#SRC += $(NXPDRVSRCDIR)/lpc17xx_ssp.c
SRC += $(NXPDRVSRCDIR)/lpc17xx_emac.c
#SRC += $(NXPDRVSRCDIR)/lpc17xx_gpdma.c
#SRC += $(NXPDRVSRCDIR)/lpc17xx_rtc.c
#SRC += $(NXPDRVSRCDIR)/lpc17xx_systick.c
#SRC += $(NXPDRVSRCDIR)/lpc17xx_wdt.c
## lwIP:
SRC += $(LWIPDIR)/core/init.c
SRC += $(LWIPDIR)/core/mem.c
SRC += $(LWIPDIR)/core/memp.c
SRC += $(LWIPDIR)/core/netif.c
SRC += $(LWIPDIR)/core/tcp.c
SRC += $(LWIPDIR)/core/stats.c
SRC += $(LWIPDIR)/core/tcp_out.c
SRC += $(LWIPDIR)/core/tcp_in.c
SRC += $(LWIPDIR)/core/pbuf.c
SRC += $(LWIPDIR)/core/timers.c
SRC += $(LWIPDIR)/core/def.c
SRC += $(LWIPDIR)/core/raw.c
SRC += $(LWIPDIR)/core/udp.c
SRC += $(LWIPDIR)/core/ipv4/ip.c
SRC += $(LWIPDIR)/core/ipv4/inet_chksum.c
SRC += $(LWIPDIR)/core/ipv4/ip_addr.c
SRC += $(LWIPDIR)/core/ipv4/ip_frag.c
SRC += $(LWIPDIR)/core/ipv4/icmp.c
SRC += $(LWIPDIR)/netif/ethernetif.c
SRC += $(LWIPDIR)/netif/etharp.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 = startup_LPC17xx.S

# Place project-specific -D (define) and/or -U options for C here.
CDEFS = 
# enables parameter-checking in NXP's library
#CDEFS += -DDEBUG
#CDEFS += -DWITH_USB_MS=1

# List any extra directories to look for include files here.
#    Each directory must be seperated by a space.
EXTRAINCDIRS  = $(APPLIBDIR) $(NXPDRVINCDIR) $(CMSISDEVDIR) $(CMSISCOREDIR) $(LWIPDIR) $(LWIPDIR)/include $(LWIPDIR)/include/ipv4

# Path to linker-scripts (see -T option)
LINKERSCRIPTPATH = .

# Optimization level, can be [0, 1, 2, 3, s]. 
# 0 = Turn off optimization. Reduce compilation time and make debugging
#     produce the expected results.
# 1 = The compiler tries to reduce code size and execution time, without
#     performing any optimizations that take a great deal of compilation time.
# 2 = GCC performs nearly all supported optimizations that do not involve a 
#     space-speed tradeoff. As compared to -O1, this option increases
#     both compilation time and the performance of the generated code.
# 3 = Optimize yet more. Turns on -finline-functions and more.
# s = -Os enables all -O2 optimizations that do not typically increase code
#     size.
# (See gcc manual for further information)
OPT = s
#OPT = 2
#OPT = 3
#OPT = 0

# Debugging format.
#DEBUG = stabs
#DEBUG = dwarf-2
DEBUG = gdb

# 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

# Compiler flags.

ifeq ($(USE_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
#  -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$(DEBUG)
CFLAGS += -O$(OPT)
CFLAGS += -mcpu=$(MCU) $(THUMB_IW) 
CFLAGS += $(CDEFS)
CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS)) -I.
# when using ".ramfunc"s without attribute longcall:
#CFLAGS += -mlong-calls
# -mapcs-frame is important if gcc's interrupt attributes are used
# (at least from my eabi tests), not needed if assembler-wrappers are used 
#CFLAGS += -mapcs-frame 
#CFLAGS += -fomit-frame-pointer
CFLAGS += -ffunction-sections -fdata-sections
CFLAGS += -Wall -Wextra
#CFLAGS += -pedantic
CFLAGS += -Wimplicit -Wcast-align -Wpointer-arith
CFLAGS += -Wredundant-decls -Wshadow -Wcast-qual -Wcast-align
CFLAGS += -Wa,-adhlns=$(addprefix $(OUTDIR)/, $(notdir $(addsuffix .lst, $(basename $<))))
# Compiler flags to generate dependency files:
#CFLAGS += -MD -MP -MF $(OUTDIR)/dep/$(@F).d 
CFLAGS += -MMD -MP -MF $(OUTDIR)/dep/$(@F).d
##testing##CFLAGS += -MF"$@" -MG -MM -MP -MT"$@" -MT"$(<:.c=.o)"
#CFLAGS += -fno-dwarf2-cfi-asm
#CFLAGS += -fno-strict-aliasing -Wno-nested-externs

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

ifeq ($(DISABLESPECIALWARNINGS),yes)
CFLAGS += -Wno-cast-qual
CONLYFLAGS += -Wno-missing-prototypes 
CONLYFLAGS += -Wno-strict-prototypes
CONLYFLAGS += -Wno-missing-declarations
endif

# Assembler flags.
#  -Wa,...:    tell GCC to pass this to the assembler.
#  -ahlns:     create listing
#  -g$(DEBUG): have the assembler create line number information
ASFLAGS  = -mcpu=$(MCU) $(THUMB_IW) -I. -x assembler-with-cpp
ASFLAGS += -D__ASSEMBLY__ $(ADEFS)
ASFLAGS += -Wa,-adhlns=$(addprefix $(OUTDIR)/, $(notdir $(addsuffix .lst, $(basename $<))))
ASFLAGS += -Wa,-g$(DEBUG)
ASFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))

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

# Set linker-script name depending on selected run-mode and chip
ifeq ($(RUN_MODE),RAM_RUN)
LDFLAGS +=-T$(LINKERSCRIPTPATH)/$(CHIP)_ram.ld
else 
LDFLAGS +=-T$(LINKERSCRIPTPATH)/$(CHIP)_flash.ld
endif

# Autodetect environment
SHELL   = sh
ifneq ($(or $(COMSPEC), $(ComSpec)),)
$(info COMSPEC detected $(COMSPEC) $(ComSpec))
ifeq ($(findstring cygdrive,$(shell set)),)
SHELL:=$(or $(COMSPEC),$(ComSpec))
SHELL_IS_WIN32=1
else
$(info cygwin detected)
#override user-setting since cygwin has rm
REMOVE_CMD:=rm
endif
else
#most probaly a Unix/Linux/BSD system which should have rm
REMOVE_CMD:=rm
endif
$(info SHELL is $(SHELL), REMOVE_CMD is $(REMOVE_CMD))

# Define programs and commands.
CC      = $(TCHAIN_PREFIX)gcc
CPP     = $(TCHAIN_PREFIX)g++
AR      = $(TCHAIN_PREFIX)ar
OBJCOPY = $(TCHAIN_PREFIX)objcopy
OBJDUMP = $(TCHAIN_PREFIX)objdump
SIZE    = $(TCHAIN_PREFIX)size
NM      = $(TCHAIN_PREFIX)nm
REMOVE  = $(REMOVE_CMD) -f

# Define Messages
# English
MSG_BEGIN = --------  begin, mode: $(RUN_MODE)  --------
MSG_END = --------  end  --------
MSG_SIZE_BEFORE = Size before:
MSG_SIZE_AFTER = Size after build:
MSG_LOAD_FILE = Creating load file:
MSG_EXTENDED_LISTING = Creating Extended Listing/Disassembly:
MSG_SYMBOL_TABLE = Creating Symbol Table:
MSG_LINKING = ---- Linking:
MSG_COMPILING = ---- Compiling C:
MSG_COMPILING_ARM = ---- Compiling C ARM-only:
MSG_COMPILINGCPP = ---- Compiling C++:
MSG_COMPILINGCPP_ARM = ---- Compiling C++ ARM-only:
MSG_ASSEMBLING = ---- Assembling:
MSG_ASSEMBLING_ARM = ---- Assembling ARM-only:
MSG_CLEANING = Cleaning project:
MSG_LPC21_RESETREMINDER = You may have to bring the target in bootloader-mode now.
MSG_ASMFROMC = "Creating asm-File from C-Source:"
MSG_ASMFROMC_ARM = "Creating asm-File from C-Source (ARM-only):"

# List of all source files.
ALLSRC     = $(ASRCARM) $(ASRC) $(SRCARM) $(SRC) $(CPPSRCARM) $(CPPSRC)
# List of all source files without directory and file-extension.
ALLSRCBASE = $(notdir $(basename $(ALLSRC)))

# Define all object files.
ALLOBJ     = $(addprefix $(OUTDIR)/, $(addsuffix .o, $(ALLSRCBASE)))

# Define all listing files (used for make clean).
LSTFILES   = $(addprefix $(OUTDIR)/, $(addsuffix .lst, $(ALLSRCBASE)))
# Define all depedency-files (used for make clean).
DEPFILES   = $(addprefix $(OUTDIR)/dep/, $(addsuffix .o.d, $(ALLSRCBASE)))

# Default target. Must be the first one
all: begin createdirs gccversion build sizeafter end

elf: $(OUTDIR)/$(TARGET).elf
lss: $(OUTDIR)/$(TARGET).lss 
sym: $(OUTDIR)/$(TARGET).sym
hex: $(OUTDIR)/$(TARGET).hex
bin: $(OUTDIR)/$(TARGET).bin

# Target for the build-sequence.
build: elf lss sym hex bin

# Create output directories.
ifdef SHELL_IS_WIN32
createdirs:
	-@md $(OUTDIR) >NUL 2>&1 || echo "" >NUL
	-@md $(OUTDIR)\dep >NUL 2>&1 || echo "" >NUL
else
createdirs:
	-@mkdir $(OUTDIR) 2>/dev/null || echo "" >/dev/null
	-@mkdir $(OUTDIR)/dep 2>/dev/null || echo "" >/dev/null
endif

# Eye candy.
begin:
	@echo $(MSG_BEGIN)

end:
	@echo $(MSG_END)

# Display sizes of sections.
ELFSIZE = $(SIZE) -A  $(OUTDIR)/$(TARGET).elf
sizebefore:
#	@if [ -f  $(OUTDIR)/$(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi

sizeafter:
#	@if [ -f  $(OUTDIR)/$(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi
	@echo $(MSG_SIZE_AFTER)
	$(ELFSIZE)

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

# Program the device.
ifeq ($(FLASH_TOOL),OPENOCD)
# Program the device with Dominic Rath's OPENOCD in "batch-mode"
program: $(OUTDIR)/$(TARGET).elf
	@echo "Programming with OPENOCD"
ifdef SHELL_IS_WIN32 
	$(subst /,\,$(OOCD_EXE)) $(OOCD_CL)
else
	$(OOCD_EXE) $(OOCD_CL)
endif
else
# Program the device using lpc21isp (for NXP2k and ADuC UART bootloader)
program: $(OUTDIR)/$(TARGET).hex
	@echo $(MSG_LPC21_RESETREMINDER)
	-$(LPC21ISP) $(LPC21ISP_OPTIONS) $(LPC21ISP_FLASHFILE) $(LPC21ISP_PORT) $(LPC21ISP_BAUD) $(LPC21ISP_XTAL)
endif

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

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

# Create extended listing file/disassambly from ELF output file.
# using objdump (testing: option -C)
%.lss: %.elf
	@echo $(MSG_EXTENDED_LISTING) $@
	$(OBJDUMP) -h -S -C -r $< > $@

# 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 : $(ALLOBJ)
%.elf:  $(ALLOBJ) $(BUILDONCHANGE)
	@echo $(MSG_LINKING) $@
# use $(CC) for C-only projects or $(CPP) for C++-projects:
ifeq "$(strip $(CPPSRC)$(CPPARM))" ""
	$(CC) $(THUMB) $(CFLAGS) $(ALLOBJ) --output $@ -nostartfiles $(LDFLAGS)
else
	$(CPP) $(THUMB) $(CFLAGS) $(ALLOBJ) --output $@ $(LDFLAGS)
endif


# Assemble: create object files from assembler source files.
define ASSEMBLE_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_ASSEMBLING) $$< to $$@
	$(CC) -c $(THUMB) $$(ASFLAGS) $$< -o $$@ 
endef
$(foreach src, $(ASRC), $(eval $(call ASSEMBLE_TEMPLATE, $(src)))) 

# Assemble: create object files from assembler source files. ARM-only
define ASSEMBLE_ARM_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_ASSEMBLING_ARM) $$< to $$@
	$(CC) -c $$(ASFLAGS) $$< -o $$@ 
endef
$(foreach src, $(ASRCARM), $(eval $(call ASSEMBLE_ARM_TEMPLATE, $(src)))) 


# Compile: create object files from C source files.
define COMPILE_C_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_COMPILING) $$< to $$@
	$(CC) -c $(THUMB) $$(CFLAGS) $$(CONLYFLAGS) $$< -o $$@ 
endef
$(foreach src, $(SRC), $(eval $(call COMPILE_C_TEMPLATE, $(src)))) 

# Compile: create object files from C source files. ARM-only
define COMPILE_C_ARM_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_COMPILING_ARM) $$< to $$@
	$(CC) -c $$(CFLAGS) $$(CONLYFLAGS) $$< -o $$@ 
endef
$(foreach src, $(SRCARM), $(eval $(call COMPILE_C_ARM_TEMPLATE, $(src)))) 


# Compile: create object files from C++ source files.
define COMPILE_CPP_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_COMPILINGCPP) $$< to $$@
	$(CC) -c $(THUMB) $$(CFLAGS) $$(CPPFLAGS) $$< -o $$@ 
endef
$(foreach src, $(CPPSRC), $(eval $(call COMPILE_CPP_TEMPLATE, $(src)))) 

# Compile: create object files from C++ source files. ARM-only
define COMPILE_CPP_ARM_TEMPLATE
$(OUTDIR)/$(notdir $(basename $(1))).o : $(1) $(BUILDONCHANGE)
	@echo $(MSG_COMPILINGCPP_ARM) $$< to $$@
	$(CC) -c $$(CFLAGS) $$(CPPFLAGS) $$< -o $$@ 
endef
$(foreach src, $(CPPSRCARM), $(eval $(call COMPILE_CPP_ARM_TEMPLATE, $(src)))) 


# Compile: create assembler files from C source files. ARM/Thumb
$(SRC:.c=.s) : %.s : %.c $(BUILDONCHANGE)
	@echo $(MSG_ASMFROMC) $< to $@
	$(CC) $(THUMB) -S $(CFLAGS) $(CONLYFLAGS) $< -o $@

# Compile: create assembler files from C source files. ARM only
$(SRCARM:.c=.s) : %.s : %.c $(BUILDONCHANGE)
	@echo $(MSG_ASMFROMC_ARM) $< to $@
	$(CC) -S $(CFLAGS) $(CONLYFLAGS) $< -o $@

# Target: clean project.
clean: begin clean_list end

clean_list :
	@echo $(MSG_CLEANING)
	$(REMOVE) $(OUTDIR)/$(TARGET).map
	$(REMOVE) $(OUTDIR)/$(TARGET).elf
	$(REMOVE) $(OUTDIR)/$(TARGET).hex
	$(REMOVE) $(OUTDIR)/$(TARGET).bin
	$(REMOVE) $(OUTDIR)/$(TARGET).sym
	$(REMOVE) $(OUTDIR)/$(TARGET).lss
	$(REMOVE) $(ALLOBJ)
	$(REMOVE) $(LSTFILES)
	$(REMOVE) $(DEPFILES)
	$(REMOVE) $(SRC:.c=.s)
	$(REMOVE) $(SRCARM:.c=.s)
	$(REMOVE) $(CPPSRC:.cpp=.s)
	$(REMOVE) $(CPPSRCARM:.cpp=.s)
	$(REMOVE) $(TARGET_CRC)

# Include the dependency files.
##-include $(wildcard dep/*)
-include $(wildcard *.d)

# Listing of phony targets.
.PHONY : all begin end sizebefore sizeafter gccversion build elf hex bin lss sym clean clean_list program createdirs