.PHONY: build buildfs upload uploadfs monitor clean ota flash erase

# Serial port — override with: make upload PORT=/dev/ttyACM0
PORT ?= /dev/ttyACM2
BAUD ?= 921600
BUILD_DIR = .pio/build/lolin_s2_mini

# ESP32-S2 bootloader lives at 0x1000 (not 0x0 like S3/C3)
BOOTLOADER_OFFSET = 0x1000

# LittleFS partition offset (from partition table)
FS_OFFSET = 0x290000

ESPTOOL = ~/.platformio/penv/bin/esptool

build:
	pio run

buildfs:
	pio run -t buildfs

upload: build
	$(ESPTOOL) --chip esp32s2 --port $(PORT) --baud $(BAUD) \
		write_flash \
		$(BOOTLOADER_OFFSET) $(BUILD_DIR)/bootloader.bin \
		0x8000 $(BUILD_DIR)/partitions.bin \
		0x10000 $(BUILD_DIR)/firmware.bin

uploadfs: buildfs
	$(ESPTOOL) --chip esp32s2 --port $(PORT) --baud $(BAUD) \
		write_flash $(FS_OFFSET) $(BUILD_DIR)/littlefs.bin

flash: upload uploadfs

monitor:
	pio device monitor --port $(PORT)

erase:
	$(ESPTOOL) --chip esp32s2 --port $(PORT) erase_flash

clean:
	pio run -t clean

ota:
	pio run -t upload --upload-port attenuator.local