CROSS_COMPILE:=arm-none-eabi-
CC:=$(CROSS_COMPILE)gcc
LD:=$(CROSS_COMPILE)gcc
WOLFSSL:=$(HOME)/wolfssl
VERSION?=1

OBJS:=startup.o main.o system.o  usecfs_dev_spi.o usecfs.o mem.o led.o \
	i2c.o display.o font_twisted.o spi.o spi_flash.o button.o systick.o newlib.o uart.o ui.o \
	sdcard.o random.o usb.o mutex.o fw_update.o
OBJS+= \
	   $(WOLFSSL)/wolfcrypt/src/sha256.o \
	   $(WOLFSSL)/wolfcrypt/src/chacha.o \
	   $(WOLFSSL)/wolfcrypt/src/aes.o \
	   $(WOLFSSL)/wolfcrypt/src/pwdbased.o \
	   $(WOLFSSL)/wolfcrypt/src/hash.o \
	   $(WOLFSSL)/wolfcrypt/src/hmac.o \
	   $(WOLFSSL)/wolfcrypt/src/sp_int.o \
	   $(WOLFSSL)/wolfcrypt/src/sp_cortexm.o \
       $(WOLFSSL)/wolfcrypt/src/wolfmath.o \
       $(WOLFSSL)/wolfcrypt/src/memory.o \
       $(WOLFSSL)/wolfcrypt/src/random.o \
       $(WOLFSSL)/wolfcrypt/src/wc_port.o


UMX:=lib/unicore-mx/lib/libucmx_stm32f4.a
UMXFLAGS:=-Ilib/unicore-mx/include/ -DSTM32F4
LIBS+=$(UMX)


LSCRIPT:=target.ld

OBJCOPY:=$(CROSS_COMPILE)objcopy

CFLAGS:=-mcpu=cortex-m3 -mthumb -Wall -Wno-main -Wstack-usage=320 \
   	-ffreestanding -Wno-unused -DBLOCK_SIZE=4096 -I. -I$(WOLFSSL) -Ilib/unicore-mx/include \
    -Iwolfboot/src -Iwolfboot/hal -Iwolfboot/include/wolfboot
CFLAGS+=-specs=nano.specs -lc -lg 
CFLAGS+=$(UMXFLAGS)
CFLAGS+=-O2
#CFLAGS+=-g -ggdb3

CFLAGS+=-DWOLFSSL_USER_SETTINGS  -DCRYPTO
ASFLAGS:=$(CFLAGS)

LDFLAGS:=-T $(LSCRIPT) -Wl,-gc-sections -Wl,-Map=image.map -mcpu=cortex-m3 -mthumb -nostartfiles

#all: image.bin

image.bin: image.elf
	$(OBJCOPY) -O binary $^ $@

image.elf: $(LIBS) $(OBJS) $(LSCRIPT)
	$(LD) $(LDFLAGS) $(OBJS) $(LIBS) -o $@

wolfboot: wolfboot-align.bin

wolfboot-align.bin:
	@rm -f wolfboot/.config
	@rm -f $(WOLFSSL)/wolfcrypt/src/*.o
	cp wolfboot.config wolfboot/.config
	make -C wolfboot $@

$(UMX):
	make -C lib/unicore-mx FP_FLAGS="-O3 -mfloat-abi=soft" TARGETS=stm32/f4

sign: image.bin
	python3 wolfboot/tools/keytools/sign.py image.bin wolfboot/ecc256.der $(VERSION)
	
clean:
	@rm -f image.bin image.elf *.o image.map $(WOLFSSL)/wolfcrypt/src/*.o $(USECFS)/src/*.o
	make -C lib/unicore-mx clean
	make -C wolfboot clean

.PHONY: wolfboot