Commit 424b00e5 authored by simon's avatar simon
Browse files

simple example

parent 9881f08e

README.md

+18 −2
Original line number Diff line number Diff line
@@ -18,9 +18,23 @@ Overview/docs: [![GoDoc](https://godoc.org/github.com/splace/joysticks?status.sv 


     go get github.com/splace/joysticks



# Example: 

# Examples: 



print out event info when pressing button #1 or moving hat#1.(with 10sec timeout.) 

highlevel: block until button one pressed.



	package main



	import . "github.com/splace/joysticks"



	func main() {

		evts := Capture(

			Channel{1, HID.OnClose},  // event[0] chan set to receive button #1 closes events

		)

		<-evts[0]

	}





print out description of event when pressing button #1 or moving hat#1.(with 10sec timeout.) 



	package main
@@ -34,6 +48,8 @@ print out event info when pressing button #1 or moving hat#1.(with 10sec timeout 
		if device == nil {

			panic("no HIDs")

		}



		// using Connect allows a device to be interrogated

		fmt.Printf("HID#1:- Buttons:%d, Hats:%d\n", len(device.Buttons), len(device.HatAxes)/2)



		// make channels for specific events

examples/play/play.go

+2 −62
Original line number Diff line number Diff line 
package main



import (

	"io"

	"os/exec"

	"time"

	"math"

	"os"

	"os/signal"

	"log"

)



import . "github.com/splace/joysticks"



import . "github.com/splace/sounds"





func main() {

	stopChan := make(chan os.Signal)

	signal.Notify(stopChan, os.Interrupt)



	events := Capture(

		Channel{10, HID.OnLong},  // event[0] button #10 long pressed

		Channel{1, HID.OnClose},  // event[1] button #1 closes

		Channel{7, HID.OnOpen},  // event[2] button #7 opens

		Channel{8, HID.OnOpen},  // event[3] button #8 opens

		Channel{2, HID.OnRotate}, // event[4] hat #1 rotates

		Channel{1, HID.OnEdge}, // event[5] hat #2 rotates

		Channel{1, HID.OnClose},  // event[0] is button #1 closes

	)

	var volume float32 = .5

	var octave =5

	var note int =1

	for {

		select {

		case <-stopChan: // wait for SIGINT

			log.Println("Interrupted")

			return

		case <-events[0]:

			return

		case <-events[1]:

			play(NewSound(NewTone(Period(octave,note), float64(volume)), time.Second/3))

		case <-events[2]:

			octave++

		case <-events[3]:

			octave--

		case h := <-events[4]:

			volume = h.(AngleEvent).Angle/6.28 + .5

		case h := <-events[5]:

			//f = time.Duration(100*math.Pow(2, float64(h.(HatAngleEvent).Angle)/6.28)) * time.Second / 44000

			note = int(h.(AngleEvent).Angle*6 / math.Pi)+6

			play(NewSound(NewTone(Period(octave,note), float64(volume)), time.Second/3))

		}

	<-events[0]

}

}



func play(s Sound) {

	cmd := exec.Command("aplay")

	out, in := io.Pipe()

	go func() {

		Encode(in, 2, 44100, s)

		in.Close()

	}()

	cmd.Stdin = out

	err := cmd.Run()

	if err != nil {

		panic(err)

	}

	log.Println("Playing:",s)

}