override SHELL := /bin/sh
override MAKEFLAGS += --no-print-directory

.DEFAULT_GOAL := help
.DELETE_ON_ERROR:

override CARGO := cargo
override CARGO_FLAGS := --locked --offline
override DFU_UTIL := dfu-util

override EMBEDDED_TARGET := thumbv7em-none-eabihf
override PACKAGE := kaptan-$(BOARD)
override TARGET_DIR := ../../target/$(EMBEDDED_TARGET)/release
override CREATE_IMAGE := ../../scripts/create-dfu-image.sh

override DFU_DEVICE := 0483:df11
override DFU_ALT := 0
override DFU_ADDRESS := 0x08000000:leave

override PRIMARY_GOAL := $(firstword $(MAKECMDGOALS))

run:
	@exec python3 ../../../scripts/make-argv.py exec run $(CARGO) build --release \
		$(CARGO_FLAGS) -p $(PACKAGE) --target $(EMBEDDED_TARGET)
	$(CREATE_IMAGE) $(TARGET_DIR)/$(PACKAGE)

_build:
	$(CARGO) build --release $(CARGO_FLAGS) -p $(PACKAGE) \
		--target $(EMBEDDED_TARGET)
	$(CREATE_IMAGE) $(TARGET_DIR)/$(PACKAGE)

flash: _build
	@printf '%s\n' 'Flashing $(TARGET_DIR)/$(PACKAGE).bin to $(DFU_DEVICE)'
	@exec python3 ../../../scripts/make-argv.py exec flash \
		$(DFU_UTIL) --device $(DFU_DEVICE) --alt $(DFU_ALT) \
		--dfuse-address $(DFU_ADDRESS) \
		--download $(TARGET_DIR)/$(PACKAGE).bin

ifeq ($(PRIMARY_GOAL),run)

.PHONY: run

# Application arguments may also look like Make goals. The run recipe recovers
# their exact boundaries from the original invocation.
.DEFAULT:
	@:

else

ifeq ($(PRIMARY_GOAL),flash)

.PHONY: flash _build

.DEFAULT:
	@:

else

.PHONY: help run flash _build

help:
	@printf '%s\n' 'Usage: make firmware/boards/$(BOARD) -- <cargo build arguments...>' '' \
		'       make firmware/boards/$(BOARD) flash -- <dfu-util arguments...>' '' \
		'With no arguments, this board is built and packaged.' \
		'The flash target builds, packages, and writes this board over DFU.'

endif

endif