func main() {
	if err := rpio.Open(); err != nil {
		log.Fatalf("Error: %v\n", err)
	}
	defer rpio.Close()

	controllers := []commands.GarageDoorController{}

	// takes one command line argument specifying the configuration file path
	configFile := "/etc/garage-doors.conf"
	if len(os.Args) == 2 {
		configFile = os.Args[1]
	}
	conf := util.ParseConfig(configFile)

	for _, door := range conf.Controllers.Garage_doors.Gpio_pins.Bcm {
		controllers = append(controllers,
			commands.ControllerFactory(door, conf.Controllers.Garage_doors.Trigger_time, conf.Controllers.Garage_doors.Force_time))
	}

	cpuCount := runtime.NumCPU()
	if cpuCount < len(controllers) {
		runtime.GOMAXPROCS(cpuCount)
	} else {
		runtime.GOMAXPROCS(len(controllers))
	}

	http.HandleFunc(conf.Endpoints.Paths.Control, func(w http.ResponseWriter, r *http.Request) {
		if r.Method != httpPost {
			fmt.Fprintf(w, "HTTP Method "+r.Method+" not valid for this endpoint.")
			return
		}

		door, doorErr := strconv.Atoi(r.PostFormValue("door"))
		if doorErr != nil || door >= len(controllers) {
			fmt.Fprintf(w, "Error parsing door number.")
			return
		}

		force, forceErr := strconv.ParseBool(r.PostFormValue("force"))
		if forceErr != nil {
			fmt.Fprintf(w, "Error parsing force value.")
			return
		}

		log.Println("Opening door " + r.PostFormValue("door") + ", force: " + r.PostFormValue("force"))

		go controllers[door].Trigger(force)

		fmt.Fprintf(w, "door: %d, force: %v", door, force)
	})

	log.Println("Starting server at " + conf.Endpoints.Host)
	log.Fatal(http.ListenAndServe(conf.Endpoints.Host, nil))
}
示例#2
0
func main() {
	// Open and map memory to access gpio, check for errors
	if err := rpio.Open(); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	go func() {
		// TODO(jbd): Use mdns after https://github.com/hashicorp/mdns/issues/44
		// is resolved for communication.
		http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
			ms := r.URL.Query().Get("t")
			if ms != "" {
				t, _ := strconv.Atoi(ms)
				tick = time.Duration(t) * time.Millisecond
			}
			io.WriteString(w, "ok\n")
		})
		log.Fatal(http.ListenAndServe(":8080", nil))
	}()

	// Unmap gpio memory when done
	defer rpio.Close()

	// Set pin to output mode
	for _, p := range pins {
		p.Output()
	}

	for {
		for _, p := range pins {
			p.High()
			time.Sleep(tick)
			p.Low()
		}
	}
}