ARMOBJDUMP?= arm-none-eabi-objdump
ARMCC?= arm-none-eabi-gcc
ARMTARGET?= -mcpu=cortex-m3 -mthumb -DSTROBE_SINGLE_THREAD=1

# Clang doesn't work due to no-nano libc
#ARMCC?=clang-mp-9.0
#ARMTARGET?= -nostdlib -ffreestanding -target arm-none-eabi -mcpu=cortex-m3 -mfloat-abi=soft  -mthumb

PROG = lora.irr
PROGEXT = .elf

SRCS = main.c
SRCS+= board.c
SRCS+= misc.c
SRCS+= strobe_rng_init.c

CFLAGS+= -I$(.CURDIR)
CFLAGS+= -g
#CFLAGS+= -DNDEBUG

# Strobe
.PATH: $(.CURDIR)/strobe
CFLAGS+= -I$(.CURDIR)/strobe
SRCS+= strobe.c \
	x25519.c

# LoRamac (SX1276) radio code
LORAMAC_SRC = $(.CURDIR)/loramac/src
.PATH: $(LORAMAC_SRC)/radio/sx1276 $(LORAMAC_SRC)/system $(LORAMAC_SRC)/boards/mcu $(LORAMAC_SRC)/boards/NucleoL152
CFLAGS+= -I$(LORAMAC_SRC)/boards
CFLAGS+= -I$(LORAMAC_SRC)/system
CFLAGS+= -I$(LORAMAC_SRC)/radio
CFLAGS+= -DUSE_HAL_DRIVER -DSX1276MB1LAS
SRCS+= sx1276.c
SRCS+= utilities.c
SRCS+= adc.c timer.c delay.c gpio.c uart.c fifo.c
SRCS+= adc-board.c delay-board.c gpio-board.c rtc-board.c lpm-board.c sx1276mb1las-board.c spi-board.c uart-board.c

# Microcontroller
STM32=$(.CURDIR)/stm32
.PATH: $(STM32)/l151ccux
LINKER_SCRIPT=$(STM32)/l151ccux/STM32L151CCUX_FLASH.ld
SRCS+=				\
	startup_stm32l151ccux.s	\
	stm32l1xx_hal.c		\
	stm32l1xx_hal_adc.c	\
	stm32l1xx_hal_adc_ex.c	\
	stm32l1xx_hal_cortex.c	\
	stm32l1xx_hal_dma.c	\
	stm32l1xx_hal_gpio.c	\
	stm32l1xx_hal_spi.c	\
	stm32l1xx_hal_pwr.c	\
	stm32l1xx_hal_pwr_ex.c	\
	stm32l1xx_hal_pcd.c	\
	stm32l1xx_hal_pcd_ex.c	\
	stm32l1xx_hal_rcc.c	\
	stm32l1xx_hal_rcc_ex.c	\
	stm32l1xx_hal_rtc.c	\
	stm32l1xx_hal_rtc_ex.c	\
	stm32l1xx_hal_uart.c	\
	system_stm32l1xx.c

SRCS+=				\
	stm32l1xx_it.c		\
	stm32l1xx_hal_msp.c

CFLAGS+= -I$(STM32)
CFLAGS+= -I$(STM32)/l151ccux
CFLAGS+= -DSTM32L151xC

# USB
.PATH: $(STM32)/usb
SRCS+=				\
	stm32l1xx_ll_usb.c	\
	usb_device.c		\
	usbd_cdc.c		\
	usbd_cdc_if.c		\
	usbd_conf.c		\
	usbd_core.c		\
	usbd_ctlreq.c		\
	usbd_desc.c		\
	usbd_ioreq.c

CFLAGS+= -I$(STM32)/usb

OBJS = $(SRCS:C/.c$/.o/)
CFLAGS+= -Werror -Wall

.PHONY: all
all: $(PROG)$(PROGEXT) $(PROG).list

.PHONY: depend
depend: $(SRCS)
	$(ARMCC) $(ARMTARGET) $(CFLAGS) $(.ALLSRC) -MM > .depend || rm -f .depend

$(PROG)$(PROGEXT): $(OBJS)
	$(ARMCC) $(ARMTARGET) -o $@ $(.ALLSRC) -T$(LINKER_SCRIPT) --specs=nosys.specs -Wl,--gc-sections -static --specs=nano.specs -Wl,--start-group -lc -lm -Wl,--end-group

$(PROG).list: $(PROG)$(PROGEXT)
	$(ARMOBJDUMP) -h -S $(.ALLSRC) > $@ || rm -f $@

.PHONY: runbuild
runbuild: $(SRCS)
	for i in $(.MAKEFILE_LIST) $(.ALLSRC) $$(gsed ':x; /\\$$/ { N; s/\\\n//; tx }' < .depend  | sed -e 's/^[^:]*://'); do if [ "$$i" != ".." ]; then echo $$i; fi; done | entr -d sh -c 'echo starting...; cd $(.CURDIR) && $(MAKE) $(.MAKEFLAGS) depend && $(MAKE) $(.MAKEFLAGS) all'

.PHONY: runtests
runtests: lora.py
	ls $(.ALLSRC) | entr sh -c 'PYTHONPATH="$(.CURDIR)" python -m coverage run -m unittest lora && coverage report --omit=p/\* -m -i'

.c.o:
	$(ARMCC) $(ARMTARGET) $(CFLAGS) -c $< -o $@

STROBE_NAME = strobe
STROBE_REPO = https://git.code.sf.net/p/strobe/code
STROBE_BRANCH = master

LORAMAC_NAME = loramac
LORAMAC_REPO = https://github.com/Lora-net/LoRaMac-node.git
LORAMAC_BRANCH = master

.for module in STROBE LORAMAC
.PHONY: init-$($(module)_NAME)
init-$($(module)_NAME):
	git subtree add -P $($(module)_NAME) --squash $($(module)_REPO) $($(module)_BRANCH)

.PHONY: update-$($(module)_NAME)
update-$($(module)_NAME):
	git subtree pull -P $($(module)_NAME) --squash $($(module)_REPO) $($(module)_BRANCH)
.endfor