make.sh

#!/bin/sh

 # Author: Dino Ciuffetti - dam2000 at gmail dot com
 # Home: https://github.com/dam2k/fanChat
 # Date: 2019-10-27
 # Whatis: Melopero's FanHat Raspberry Pi FAN controller daemon rethinked from scratch and written in C
 # Work with: Melopero FAN HAT for Raspberry Pi 4 - https://www.melopero.com/shop/melopero-engineering/melopero-fan-hat-for-raspberry-pi-4/
 # Requires: PiGpio library: http://abyz.me.uk/rpi/pigpio/ - apt update && apt install libpigpio-dev
 # Replaces: official fan driver written in python: https://www.melopero.com/fan-hat/
 # License: MIT License - https://opensource.org/licenses/MIT
 #
 # Notes:
 # The Melopero FAN HAT for Raspberry Pi 4 is a cool (freddo!! :-)) fan driver for Raspberry Pi 4. It works using GPIO PIN 18 that has
 # hardware driven PWM capabilities. This way they can handle fan speed changing the PIN's duty cycle.
 # We continuously read the CPU temperature thanks to the /sys/class/thermal/thermal_zone0/temp file and we take care of cooling
 # the CPU by setting up the right fan speed modulating the pin's PWM attached to the fan hat.
 # Since I really hate when the fan is always on at low speed, I thinked of using a high and low watermarks.
 # If the cpu's temperature is below the LW the fan will be shut down, and when the cpu's temperature raises above the HW the fan
 # will come into play at the right speed. Also, there is a trigger timeout that will fire if the fan is down for more then a few minutes
 # after the LW event. In this way we can cool down the RPI's temperature a little bit without reaching the HW or stressing us too much.
 # You also enjoy it, but don't stress me!

 #
 # Copyright 2019 Dino Ciuffetti - dam2000 at gmail dot com
 # 
 # Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 # 
 # The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 # 
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

set -x

gcc -O2 -Wall -c -o cputemp.o cputemp.c
gcc -O2 -Wall -c -o daemon.o daemon.c
gcc -O2 -Wall -c -o fan.o fan.c
gcc -O2 -Wall -c -o controller.o controller.c $(pkg-config --cflags libbsd-overlay)

gcc -O2 -Wall -o fanChat cputemp.o daemon.o fan.o controller.o -lpigpio $(pkg-config --cflags libbsd-overlay) $(pkg-config --libs libbsd-overlay) $(pkg-config --libs libbsd-ctor)