default: all

PREFIX ?= msp430-

ifeq ($(CC),cc)
CC := gcc
endif
CC := $(PREFIX)$(CC)
OBJCOPY ?= $(PREFIX)objcopy
GDB ?= $(PREFIX)gdb
SIZE ?= $(PREFIX)size
PYTHON3 ?= python3

MCU ?= msp430fr5994
#MCU ?= msp430fr5962

CFLAGS = $(patsubst %,-I%,$(INCLUDE)) -mmcu=$(MCU) -Os \
    -Werror=implicit-function-declaration -Werror=return-type \
    -Werror=maybe-uninitialized \
    -ffunction-sections -fdata-sections -g -ffreestanding -flto
LDFLAGS = -Wl,--cref #-Wl,--gc-sections -nostartfiles #-Wl,--print-gc-sections

SZFLAGS ?= -x --format=SysV

MSP430WARE_DIR ?= $(HOME)/ti/msp430/MSP430Ware_3_80_14_01

LIBMSP430_PATH := /usr/lib

MSPDEBUG_BIN := mspdebug
MSPDEBUG = LD_LIBRARY_PATH="$(LIBMSP430_PATH):$$LD_LIBRARY_PATH" $(MSPDEBUG_BIN) tilib

-include config.mk

MSP430WARE_DRIVER := $(MSP430WARE_DIR)/driverlib/driverlib/MSP430FR5xx_6xx

INCLUDE := include/ $(MSP430WARE_DRIVER)/

LIBSRC := cs dma eusci_a_uart gpio hspll mtif pmm sfr sysctl timer_a tlv uups wdt_a

SOURCES := $(wildcard src/*.c) $(wildcard src/*.S) \
	$(patsubst %,$(MSP430WARE_DRIVER)/%.c,$(LIBSRC))

LDSCRIPT := $(MCU).ld

OBJECTS := $(patsubst $(MSP430WARE_DRIVER)/%,obj/%.o,$(patsubst src/%,obj/%.o,$(SOURCES)))

%/:
	@mkdir -v "$@"

bin/main.elf: $(OBJECTS) $(LDSCRIPT)
	@[ -d bin/ ] || mkdir -vp "bin/"
	$(CC) -o "$@" $(OBJECTS) $(CFLAGS) $(LDFLAGS) -T $(LDSCRIPT) "-Wl,-Map=$@.map"
	@$(SIZE) $(SZFLAGS) "$@"

bin/main.bin: bin/main.elf
	$(OBJCOPY) -O binary "$<" "$@"

obj/%.o: src/%
	@[ -d obj/ ] || mkdir -vp "obj/"
	$(CC) -c -o "$@" "$<" $(CFLAGS)
obj/%.o: $(MSP430WARE_DRIVER)/%
	@[ -d obj/ ] || mkdir -vp "obj/"
	$(CC) -c -o "$@" "$<" $(CFLAGS)


all: bin/main.bin

clean:
	@$(RM) -v bin/* obj/*

mspdebug:
	$(MSPDEBUG)

load: bin/main.elf
	$(MSPDEBUG) reset 'load bin/main.elf' reset

dbg: bin/main.elf
	$(MSPDEBUG) reset 'load bin/main.elf' 'sym import bin/main.elf' 'gdb 3333' run

gdb: bin/main.elf
	$(GDB) -ex 'target remote localhost:3333' bin/main.elf

.PHONY: default all clean hogs