esp-idf/components/esptool_py/Makefile.projbuild

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# 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)
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ESPFLASHFREQ ?= $(CONFIG_ESPTOOLPY_FLASHFREQ)
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PYTHON ?= $(call dequote,$(CONFIG_PYTHON))
# two commands that can be used from other components
# to invoke esptool.py (with or without serial port args)
#
# NB: esptool.py lives in the sdk/bin directory not the component directory
ESPTOOLPY_SRC := $(COMPONENT_PATH)/esptool/esptool.py
ESPTOOLPY := $(PYTHON) $(ESPTOOLPY_SRC) --chip esp32
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ESPTOOLPY_SERIAL := $(ESPTOOLPY) --port $(ESPPORT) --baud $(ESPBAUD)
# the no-stub argument is temporary until esptool.py fully supports compressed uploads
ESPTOOLPY_WRITE_FLASH=$(ESPTOOLPY_SERIAL) write_flash $(if $(CONFIG_ESPTOOLPY_COMPRESSED),-z) --flash_mode $(ESPFLASHMODE) --flash_freq $(ESPFLASHFREQ)
ESPTOOL_ALL_FLASH_ARGS += $(CONFIG_APP_OFFSET) $(APP_BIN)
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$(APP_BIN): $(APP_ELF) $(ESPTOOLPY_SRC)
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$(Q) $(ESPTOOLPY) elf2image --flash_mode $(ESPFLASHMODE) --flash_freq $(ESPFLASHFREQ) -o $@ $<
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flash: all_binaries $(ESPTOOLPY_SRC)
@echo "Flashing binaries to serial port $(ESPPORT) (app at offset $(CONFIG_APP_OFFSET))..."
$(Q) $(ESPTOOLPY_WRITE_FLASH) $(ESPTOOL_ALL_FLASH_ARGS)
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app-flash: $(APP_BIN) $(ESPTOOLPY_SRC)
@echo "Flashing app to serial port $(ESPPORT), offset $(CONFIG_APP_OFFSET)..."
$(Q) $(ESPTOOLPY_WRITE_FLASH) $(CONFIG_APP_OFFSET) $(APP_BIN)
$(eval $(call SubmoduleRequiredForFiles,$(ESPTOOLPY_SRC)))