ArduinoCLI + ESP32 + FFAT

Makefile

# --------------------------------------
# Arduino-CLI + ESP32 + FFAT
# --------------------------------------
# http://marc.merlins.org/perso/arduino/post_2019-03-30_Using-FatFS-FFat-on-ESP32-Flash-With-Arduino.html
# https://github.com/marcmerlin/esp32_fatfsimage/blob/master/README.md
# https://github.com/labplus-cn/mkfatfs
# https://github.com/lorol/arduino-esp32fs-plugin
# https://github.com/marcmerlin/arduino-esp32/tree/master/libraries/FFat/examples/FFat_Test
# --------------------------------------

# スケッチのDirectory
AR_SKETCH=app

# Serialポート
AR_PORT=/dev/cu.usbserial-2002

# ESP32-WROOM-32E 16M Flash (3MB APP/9MB FATFS)
AR_FQBN=esp32:esp32:esp32:UploadSpeed=921600,PSRAM=enabled,FlashSize=16M,PartitionScheme=app3M_fat9M_16MB

ARDUINO_DATA_PATH := $(shell arduino-cli config dump --format json | jq -r .directories.data)
ESPTOOL_VERSION := $(shell arduino-cli board details -b esp32:esp32:esp32 --format json | jq -r '.tools_dependencies | .[] | select(.name == "esptool_py") | .version')
ESPTOOL_PATH := $(ARDUINO_DATA_PATH)/packages/esp32/tools/esptool_py/$(ESPTOOL_VERSION)/esptool

# PartitionScheme=app3M_fat9M_16MB の FATサイズと開始位置
# https://github.com/espressif/arduino-esp32/blob/master/tools/partitions/app3M_fat9M_16MB.csv 参照

# 1セクタ(4096バイト)ずらす必要がある
# https://github.com/marcmerlin/esp32_fatfsimage/blob/master/README.md

# Offset: 0x610000 - 0x1000 = 0x611000
FATFS_OFFSET := $(shell perl -E 'printf("0x%0X\n",0x610000 + 0x1000);')
# Size: 0x9F0000 - 0x1000   = 0x9EF000
FATFS_SIZE := $(shell perl -E 'printf("0x%0X\n",  0x9F0000 - 0x1000);')

upload: build/$(AR_SKETCH).ino.hex
	arduino-cli upload -b $(AR_FQBN) -p $(AR_PORT) $(AR_PROGRAMMER) --input-dir "$(CURDIR)/build"

compile: build/$(AR_SKETCH).ino.hex

monitor:
	arduino-cli monitor -p $(AR_PORT) -c Baudrate=115200 

clean:
	rm -rf build
	rm -f fatfs.img

build/$(AR_SKETCH).ino.hex: $(AR_SKETCH)/$(AR_SKETCH).ino
	arduino-cli compile -b $(AR_FQBN) --build-path "$(CURDIR)/build" $(AR_SKETCH)

.PHONY: upload compile serial clean

# https://github.com/labplus-cn/mkfatfs
bin/mkfatfs:
	mkdir -p bin
	cd bin && curl -L -o mkfatfs.zip https://github.com/labplus-cn/mkfatfs/releases/download/v2.0.1/mkfatfs_mac.zip
	cd bin && unzip mkfatfs.zip

fatfs.img: bin/mkfatfs
	@echo "FATFS_SIZE:   $(FATFS_SIZE)"
	./bin/mkfatfs -t fatfs -c fatfs -s $(FATFS_SIZE) ./fatfs.img

fatfs: fatfs.img
	@echo "FATFS_OFFSET: $(FATFS_OFFSET)"
	$(ESPTOOL_PATH) --chip esp32 --port $(AR_PORT) --baud 921600 \
	--before default_reset --after hard_reset \
	write_flash -z --flash_size detect $(FATFS_OFFSET) fatfs.img