PORT :=
BAUD := 115200

PIOBOARD = nodemcuv2
PIOPROJ = firmware/esplogger
PIODIR = .pio

.PHONY: firmware monitor reset getport

all: firmware

install-pip3:
	wget https://bootstrap.pypa.io/get-pip.py && \
		sudo python3 get-pip.py && rm get-pip.py

install-platformio:
	wget https://bootstrap.pypa.io/get-pip.py && \
		sudo python get-pip.py && rm get-pip.py
	sudo pip install platformio
	$(MAKE) add-udev-rules
	$(MAKE) add-dialout

add-dialout:
	sudo usermod -a -G dialout $$USER

add-udevrules:
	wget https://raw.githubusercontent.com/platformio/platformio/develop/scripts/99-platformio-udev.rules
	sudo cp -v 99-platformio-udev.rules /etc/udev/rules.d
	sudo service udev restart

firmware: build upload monitor

build:
	which platformio || $(MAKE) install-platformio
	@ echo "$$PIO_BUILD" | sh

upload:
	which platformio || $(MAKE) install-platformio
	cd $(PIODIR) && platformio run -t upload

monitor:
	platformio device monitor

reset: getport
	@ echo "-----------------------------------------"
	@ echo "Reseting the board"
	esptool.py --port /dev/$(PORT) run
	@ python -c "import time; time.sleep(1)"

getport:
	@ $(eval PORT := `python utils/getport.py`)
	@ echo $(PORT)

example-blink:
	$(eval PIOPROJ := examples/blink)
	@ echo "$$PIO_BUILD" | sh

example-wifiscan:
	$(eval PIOPROJ := examples/wifiscan)
	@ echo "$$PIO_BUILD" | sh
	$(MAKE) monitor

example-sdcardinfo:
	$(eval PIOPROJ := examples/sd_card_info)
	@ echo "$$PIO_BUILD" | sh
	$(MAKE) monitor

help:
	@ echo "$$HELP_MAKEFILE"

clean:
	rm -rfv $(PIODIR)

define HELP_MAKEFILE
Usage:  make <target>   where <target> can be:

  firmware        Build and upload the esplogger firmware using platformio
  monitor         Start the picocom serial monitor (autodetect port)
  reset           Attempt a soft reset of the ESP devkit board

  example-____    Build and upload one of the examples/ projects:
                      blink      -- turn on and off the led on pin 2
                      wifiscan   -- detect and print all available SSIDs
endef
export HELP_MAKEFILE


define PY_GET_PORT
import os
ports = [x for x in os.listdir("/dev") if x.startswith("ttyUSB")
									   or x.startswith("ttyACM")]
if ports and isinstance(ports[0], str):
	print(ports[0])
else:
	print("Error: Unable to find a ttyUSB/ttyACM serial port")
	raise SystemExit(1)
endef
export PY_GET_PORT


define PIO_BUILD
	mkdir -p $(PIODIR)
	rm -rf $(PIODIR)/src
	platformio init --board $(PIOBOARD) -d $(PIODIR)
	cp -rf $(PIOPROJ)/* $(PIODIR)/src/
	cd $(PIODIR) && platformio run
endef
export PIO_BUILD