Commit 85c08ad1 authored by simon's avatar simon
Browse files

add DeviceExists(index)

parent b04b7ccc

joysticks.go

+0 −10
Original line number Diff line number Diff line
@@ -357,16 +357,6 @@ func (d HID) OnEdge(index uint8) chan Event { 
//}





// see if Device exists.

func DeviceExists(index uint8) (ok bool) {

	for _, v := range d.Buttons {

		if v.number == button {

			return true

		}

	}

	return

}



// see if Button exists.

func (d HID) ButtonExists(index uint8) (ok bool) {

	for _, v := range d.Buttons {

joysticks_linux.go

+7 −0
Original line number Diff line number Diff line
@@ -20,8 +20,15 @@ type osEventRecord struct { 


const maxValue = 1<<15 - 1



// common path root, so Connect and DeviceExists are not thread safe.

var inputPathSlice = []byte("/dev/input/js ")[0:13]



// see if Device exists.

func DeviceExists(index uint8) bool {

	_,err:=os.Stat(string(strconv.AppendUint(inputPathSlice, uint64(index-1), 10)))

	return err==nil

}



// Connect sets up a go routine that puts a joysticks events onto registered channels.

// to register channels use the returned HID object's On<xxx>(index) methods.

// Note: only one event, of each type '<xxx>', for each 'index', so re-registering, or deleting, an event stops events going on the old channel.

joysticks_test.go

+34 −30
Original line number Diff line number Diff line
@@ -13,11 +13,44 @@ import ( 
)

import "math"



func TestHIDsMutipleCapture(t *testing.T) {

	if !DeviceExists(1) && !DeviceExists(2) && !DeviceExists(3) && !DeviceExists(4){

		panic("no HIDs")

	}



	buttonEvents := Capture(

		Channel{10, HID.OnLong}, // button #10 long pressed

		Channel{1, HID.OnClose}, 

	)

	hatEvents := Capture(

		Channel{1, HID.OnHat},  

		Channel{2, HID.OnSpeedX},

		Channel{2, HID.OnPanX},

	)



	var x float32 = .5

	var f time.Duration = time.Second / 440

	for {

		select {

		case <-buttonEvents[0]:

			return

		case <-buttonEvents[1]:

			play(NewSound(NewTone(f, float64(x)), time.Second/3))

		case h := <-hatEvents[0]:

			f = time.Duration(100*math.Pow(2, float64(h.(CoordsEvent).Y))) * time.Second / 44000

		case h := <-hatEvents[1]:

			fmt.Printf("hat 2 X speed %+v\n",h.(AxisEvent).V)

		case h := <-hatEvents[2]:

			fmt.Printf("hat 2 X pan %+v\n",h.(AxisEvent).V)

		}

	}

}



func TestHIDsAdvanced(t *testing.T) {

	js1 := Connect(1)



	if js1 == nil {

		panic("no HIDs")

		panic("no HID index 1")

	}

	if len(js1.Buttons) < 10 || len(js1.HatAxes) < 6 {

		t.Errorf("HID#1, available buttons %d, Hats %d\n", len(js1.Buttons), len(js1.HatAxes)/2)
@@ -94,35 +127,6 @@ func TestHIDsCapture(t *testing.T) { 
	}

}



func TestHIDsMutipleCapture(t *testing.T) {

	buttonEvents := Capture(

		Channel{10, HID.OnLong}, // button #10 long pressed

		Channel{1, HID.OnClose}, 

	)

	hatEvents := Capture(

		Channel{1, HID.OnHat},  

		Channel{2, HID.OnSpeedX},

		Channel{2, HID.OnPanX},

	)



	var x float32 = .5

	var f time.Duration = time.Second / 440

	for {

		select {

		case <-buttonEvents[0]:

			return

		case <-buttonEvents[1]:

			play(NewSound(NewTone(f, float64(x)), time.Second/3))

		case h := <-hatEvents[0]:

			f = time.Duration(100*math.Pow(2, float64(h.(CoordsEvent).Y))) * time.Second / 44000

		case h := <-hatEvents[1]:

			fmt.Printf("hat 2 X speed %+v\n",h.(AxisEvent).V)

		case h := <-hatEvents[2]:

			fmt.Printf("hat 2 X pan %+v\n",h.(AxisEvent).V)

		}

	}

}



func play(s Sound) {

	out, in := io.Pipe()

	go func() {