esp-idf/components/esptool_py/Makefile.projbuild

# Component support for esptool.py. Doesn't do much by itself,
# components have their own flash targets that can use these variables.
ESPPORT ?= $(CONFIG_ESPTOOLPY_PORT)
ESPBAUD ?= $(CONFIG_ESPTOOLPY_BAUD)
ESPFLASHMODE ?= $(CONFIG_ESPTOOLPY_FLASHMODE)
ESPFLASHFREQ ?= $(CONFIG_ESPTOOLPY_FLASHFREQ)
ESPFLASHSIZE ?= $(CONFIG_ESPTOOLPY_FLASHSIZE)

PYTHON ?= $(call dequote,$(CONFIG_PYTHON))

# two commands that can be used from other components
# to invoke esptool.py (with or without serial port args)
#
ESPTOOLPY_SRC := $(COMPONENT_PATH)/esptool/esptool.py
ESPTOOLPY := $(PYTHON) $(ESPTOOLPY_SRC) --chip esp32
ESPTOOLPY_SERIAL := $(ESPTOOLPY) --port $(ESPPORT) --baud $(ESPBAUD) --before $(CONFIG_ESPTOOLPY_BEFORE) --after $(CONFIG_ESPTOOLPY_AFTER)

# Supporting esptool command line tools
ESPEFUSEPY := $(PYTHON) $(COMPONENT_PATH)/esptool/espefuse.py
ESPSECUREPY := $(PYTHON) $(COMPONENT_PATH)/esptool/espsecure.py
export ESPSECUREPY  # is used in bootloader_support component

ESPTOOL_FLASH_OPTIONS := --flash_mode $(ESPFLASHMODE) --flash_freq $(ESPFLASHFREQ) --flash_size $(ESPFLASHSIZE)
ifdef CONFIG_ESPTOOLPY_FLASHSIZE_DETECT
ESPTOOL_WRITE_FLASH_OPTIONS := --flash_mode $(ESPFLASHMODE) --flash_freq $(ESPFLASHFREQ) --flash_size detect
else
ESPTOOL_WRITE_FLASH_OPTIONS := $(ESPTOOL_FLASH_OPTIONS)
endif

ESPTOOL_ELF2IMAGE_OPTIONS :=

ESPTOOLPY_WRITE_FLASH=$(ESPTOOLPY_SERIAL) write_flash $(if $(CONFIG_ESPTOOLPY_COMPRESSED),-z) $(ESPTOOL_WRITE_FLASH_OPTIONS)

ESPTOOL_ALL_FLASH_ARGS += $(CONFIG_APP_OFFSET) $(APP_BIN)

ifdef CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES
ifndef IS_BOOTLOADER_BUILD
# for locally signed secure boot image, add a signing step to get from unsigned app to signed app
APP_BIN_UNSIGNED := $(APP_BIN:.bin=-unsigned.bin)

$(APP_BIN): $(APP_BIN_UNSIGNED) $(SECURE_BOOT_SIGNING_KEY) $(SDKCONFIG_MAKEFILE)
	$(ESPSECUREPY) sign_data --keyfile $(SECURE_BOOT_SIGNING_KEY) -o $@ $<
endif
endif
# non-secure boot (or bootloader), both these files are the same
APP_BIN_UNSIGNED ?= $(APP_BIN)

$(APP_BIN_UNSIGNED): $(APP_ELF) $(ESPTOOLPY_SRC)
	$(ESPTOOLPY) elf2image $(ESPTOOL_FLASH_OPTIONS) $(ESPTOOL_ELF2IMAGE_OPTIONS) -o $@ $<

flash: all_binaries $(ESPTOOLPY_SRC) $(call prereq_if_explicit,erase_flash)
	@echo "Flashing binaries to serial port $(ESPPORT) (app at offset $(CONFIG_APP_OFFSET))..."
ifdef CONFIG_SECURE_BOOT_ENABLED
	@echo "(Secure boot enabled, so bootloader not flashed automatically. See 'make bootloader' output)"
endif
	$(ESPTOOLPY_WRITE_FLASH) $(ESPTOOL_ALL_FLASH_ARGS)

app-flash: $(APP_BIN) $(ESPTOOLPY_SRC) $(call prereq_if_explicit,erase_flash)
	@echo "Flashing app to serial port $(ESPPORT), offset $(CONFIG_APP_OFFSET)..."
	$(ESPTOOLPY_WRITE_FLASH) $(CONFIG_APP_OFFSET) $(APP_BIN)

# Submodules normally added in component.mk, but can be added
# at the project level as long as qualified path
COMPONENT_SUBMODULES += $(COMPONENT_PATH)/esptool

erase_flash:
	@echo "Erasing entire flash..."
	$(ESPTOOLPY_SERIAL) erase_flash

.PHONY: erase_flash