CFLAGS  = -W -Wall -Wextra -Werror -Wundef -Wshadow -Wdouble-promotion
CFLAGS += -Wformat-truncation -fno-common -Wconversion -Wno-sign-conversion
CFLAGS += -g3 -Os -ffunction-sections -fdata-sections
CFLAGS += -I. -Icmsis_core/CMSIS/Core/Include -Icmsis_f7/Include
CFLAGS += -mcpu=cortex-m7 -mthumb -mfloat-abi=hard -mfpu=fpv5-sp-d16
LDFLAGS ?= -Tlink.ld -nostdlib -nostartfiles --specs nano.specs -lc -lgcc -Wl,--gc-sections -Wl,-Map=$@.map

SOURCES = main.c syscalls.c sysinit.c
SOURCES += cmsis_f7/Source/Templates/gcc/startup_stm32f746xx.s # ST startup file. Compiler-dependent!

# FreeRTOS
SOURCES += FreeRTOS-Kernel/portable/MemMang/heap_4.c
SOURCES += FreeRTOS-Kernel/portable/GCC/ARM_CM7/r0p1/port.c
CFLAGS += -IFreeRTOS-Kernel/include 
CFLAGS += -IFreeRTOS-Kernel/portable/GCC/ARM_CM7/r0p1 -Wno-conversion

SOURCES += ../../../mongoose.c # Mongoose options are defined in mongoose_custom.h
CFLAGS += -I../../.. $(CFLAGS_EXTRA)

all build example: firmware.bin

firmware.bin: firmware.elf
	arm-none-eabi-objcopy -O binary $< $@

firmware.elf: FreeRTOS-Kernel cmsis_core cmsis_f7 $(SOURCES) hal.h link.ld 
	arm-none-eabi-gcc $(SOURCES) $(wildcard FreeRTOS-Kernel/*.c) $(CFLAGS) $(LDFLAGS) -o $@

flash: firmware.bin
	st-flash --reset write $< 0x8000000

cmsis_f7:  # ARM CMSIS core headers
	git clone --depth 1 -b v1.2.8 https://github.com/STMicroelectronics/cmsis_device_f7 $@
cmsis_core:  # ST CMSIS headers for STM32F7 series
	git clone --depth 1 -b 5.9.0 https://github.com/ARM-software/CMSIS_5 $@
FreeRTOS-Kernel:  # FreeRTOS sources
	git clone --depth 1 -b V10.5.0 https://github.com/FreeRTOS/FreeRTOS-Kernel $@

# Automated remote test. Requires env variable VCON_API_KEY set. See https://vcon.io/automated-firmware-tests/
DEVICE_URL ?= https://dash.vcon.io/api/v3/devices/5
update: firmware.bin
	curl --fail-with-body -su :$(VCON_API_KEY) $(DEVICE_URL)/ota --data-binary @$<

test: CFLAGS_EXTRA += -DUART_DEBUG=USART1
test: update
	curl --fail-with-body -su :$(VCON_API_KEY) $(DEVICE_URL)/tx?t=5 | tee /tmp/output.txt
	grep 'READY, IP:' /tmp/output.txt       # Check for network init

clean:
	@rm -rf firmware.* *.su cmsis_core cmsis_f7 FreeRTOS-Kernel