makefile

# Allow settiing a project name from the environment, default to firmware.
# Only affects the name of the generated binary.
# TODO: Set this from the directory this makefile is stored in
PROJ 			?= firmware
# Affects what DBC is generated for SJSUOne board
ENTITY 			?= DBG

# IMPORTANT: Must be accessible via the PATH variable!!!
CC              = arm-none-eabi-gcc
CPPC            = arm-none-eabi-g++
OBJDUMP         = arm-none-eabi-objdump
SIZEC           = arm-none-eabi-size
OBJCOPY         = arm-none-eabi-objcopy
NM 		        = arm-none-eabi-nm

# Internal build directories
OBJ_DIR			= obj
BIN_DIR			= bin
DBC_DIR			= _can_dbc

define n


endef

ifndef SJSUONEDEV
$(error $n$n=============================================$nSJSUOne environment variables not set.$nPLEASE run "source env.sh"$n=============================================$n$n)
endif

CFLAGS = -mcpu=cortex-m3 \
	-D DISABLE_WATCHDOG\
    -mthumb -g -Os -fmessage-length=0 \
    -ffunction-sections -fdata-sections \
    -Wall -Wshadow -Wlogical-op \
    -Wfloat-equal -DBUILD_CFG_MPU=0 \
    -fabi-version=0 \
    -fno-exceptions \
    -I"$(LIB_DIR)/" \
    -I"$(LIB_DIR)/newlib" \
    -I"$(LIB_DIR)/L0_LowLevel" \
    -I"$(LIB_DIR)/L1_FreeRTOS" \
    -I"$(LIB_DIR)/L1_FreeRTOS/trace" \
    -I"$(LIB_DIR)/L1_FreeRTOS/include" \
    -I"$(LIB_DIR)/L1_FreeRTOS/portable" \
    -I"$(LIB_DIR)/L1_FreeRTOS/portable/no_mpu" \
    -I"$(LIB_DIR)/L2_Drivers" \
    -I"$(LIB_DIR)/L2_Drivers/base" \
    -I"$(LIB_DIR)/L3_Utils" \
    -I"$(LIB_DIR)/L3_Utils/tlm" \
    -I"$(LIB_DIR)/L4_IO" \
    -I"$(LIB_DIR)/L4_IO/fat" \
    -I"$(LIB_DIR)/L4_IO/wireless" \
    -I"$(LIB_DIR)/L5_Application" \
    -I"L2_Drivers" \
    -I"L3_Utils" \
    -I"L4_IO" \
    -I"L5_Application" \
    -I"$(DBC_DIR)" \
    -MMD -MP -c

LINKFLAGS = -mcpu=cortex-m3 \
	-Os -mthumb \
	-fmessage-length=0 -ffunction-sections -fdata-sections \
	-Wall -Wshadow -Wlogical-op -Wfloat-equal \
	-T $(LIB_DIR)/loader.ld \
	-nostartfiles \
	-Xlinker \
	--gc-sections -Wl,-Map,"$(MAP)" \
	-specs=nano.specs

DBCBUILD        	= $(DBC_DIR)/generated_can.h
LIBRARIES			= $(shell find "$(LIB_DIR)" -name '*.c' -o -name '*.cpp')
SOURCES				= $(shell find . -name '*.c' -o -name '*.cpp' -not -path './test/*')
COMPILABLES 		= $(LIBRARIES) $(SOURCES)

# $(patsubst %.cpp,%.o, LIST) 		: Replace .cpp -> .o
# $(patsubst %.c,%.o, LIST)			: Replace .c -> .o
# $(patsubst src/%,%, LIST) 		: Replace src/path/file.o -> path/file.o
# $(addprefix $(OBJ_DIR)/, LIST) 	: Add OBJ DIR to path (path/file.o -> obj/path/file.o)
OBJECT_FILES 		= $(addprefix $(OBJ_DIR)/, $(patsubst %.c,%.o, $(patsubst %.cpp,%.o, $(COMPILABLES))))
EXECUTABLE			= $(BIN_DIR)/$(PROJ).elf
HEX					= $(EXECUTABLE:.elf=.hex)
LIST				= $(EXECUTABLE:.elf=.lst)
SIZE				= $(EXECUTABLE:.elf=.siz)
MAP					= $(EXECUTABLE:.elf=.map)
SYMBOLS				= $(EXECUTABLE:.elf=.sym)

.PHONY: default build clean flash telemetry cleaninstall

default:
	@echo "List of available targets:"
	@echo "    build        - builds firmware project"
	@echo "    flash        - builds and installs firmware on to SJOne board"
	@echo "    telemetry    - will launch telemetry interface"
	@echo "    clean        - cleans project folder"
	@echo "    cleaninstall - cleans, builds and installs firmware"

build: $(DBC_DIR) $(OBJ_DIR) $(BIN_DIR) $(SIZE) $(LIST) $(HEX) $(SYMBOLS)

cleaninstall: clean build flash

print-%  : ; @echo $* = $($*)

$(SYMBOLS): $(EXECUTABLE)
	@echo 'Invoking: Cross ARM GNU NM Generate Symbol Table'
	@$(NM) -C "$<" > "$@"
	@echo 'Finished building: $@'
	@echo ' '

$(HEX): $(EXECUTABLE)
	@echo 'Invoking: Cross ARM GNU Create Flash Image'
	@$(OBJCOPY) -O ihex "$<" "$@"
	@echo 'Finished building: $@'
	@echo ' '

$(SIZE): $(EXECUTABLE)
	@echo 'Invoking: Cross ARM GNU Print Size'
	@$(SIZEC) --format=berkeley "$<"
	@echo 'Finished building: $@'
	@echo ' '

$(LIST): $(EXECUTABLE)
	@echo 'Invoking: Cross ARM GNU Create Listing'
	@$(OBJDUMP) --source --all-headers --demangle --line-numbers --wide "$<" > "$@"
	@echo 'Finished building: $@'
	@echo ' '

$(EXECUTABLE): $(DBCBUILD) $(OBJECT_FILES)
	@echo 'Invoking: Cross ARM C++ Linker'
	@mkdir -p "$(dir $@)"
	@$(CPPC) $(LINKFLAGS) -o "$@" $(OBJECT_FILES)
	@echo 'Finished building target: $@'
	@echo ' '

$(OBJ_DIR)/%.o: %.cpp
	@echo 'Building file: $<'
	@echo 'Invoking: Cross ARM C++ Compiler'
	@mkdir -p "$(dir $@)"
	@$(CPPC) $(CFLAGS) -std=gnu++17 -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
	@echo 'Finished building: $<'
	@echo ' '

$(OBJ_DIR)/%.o: %.c
	@echo 'Building file: $<'
	@echo 'Invoking: Cross ARM C Compiler'
	@mkdir -p "$(dir $@)"
	@$(CC) $(CFLAGS) -std=gnu11 -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
	@echo 'Finished building: $<'
	@echo ' '

$(OBJ_DIR)/%.o: $(LIB_DIR)/%.cpp
	@echo 'Building file: $<'
	@echo 'Invoking: Cross ARM C++ Compiler'
	@mkdir -p "$(dir $@)"
	@$(CPPC) $(CFLAGS) -std=gnu++17 -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
	@echo 'Finished building: $<'
	@echo ' '

$(OBJ_DIR)/%.o: $(LIB_DIR)/%.c
	@echo 'Building file: $<'
	@echo 'Invoking: Cross ARM C Compiler'
	@mkdir -p "$(dir $@)"
	@$(CC) $(CFLAGS) -std=gnu11 -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
	@echo 'Finished building: $<'
	@echo ' '

$(DBCBUILD):
	python "$(LIB_DIR)/$(DBC_DIR)/dbc_parse.py" -i "$(LIB_DIR)/$(DBC_DIR)/243.dbc" -s $(ENTITY) > $(DBCBUILD)

$(DBC_DIR):
	mkdir -p $(DBC_DIR)

$(OBJ_DIR):
	@echo 'Creating Objects Folder: $<'
	mkdir $(OBJ_DIR)

$(BIN_DIR):
	@echo 'Creating Binary Folder: $<'
	mkdir $(BIN_DIR)

clean:
	rm -fR $(OBJ_DIR) $(BIN_DIR) $(DBC_DIR)

flash: build
	hyperload $(SJSUONEDEV) $(HEX)

telemetry:
	@telemetry