func XBoxOne(controller *usb.Device, in, out usb.Endpoint) {
read := func() (tag, code byte, data []byte, err error) {
var b [64]byte
n, err := in.Read(b[:])
log.Printf("read %d bytes: % x [err: %v]", n, b[:n], err)
if err != nil {
return 0, 0, nil, err
}
if n < 2 {
return 0, 0, nil, fmt.Errorf("only read %d bytes", n)
}
return b[0], b[1], b[2:n], nil
}
write := func(data ...byte) error {
n, err := out.Write(data)
log.Printf("sent %d bytes: % x [err: %v]", n, data, err)
if n < len(data) {
return fmt.Errorf("only sent %d of %d bytes", n, len(data))
}
return err
}
dieIf := func(err error, format string, args ...interface{}) {
if err == nil {
return
}
msg := fmt.Sprintf(format, args...)
log.Fatalf("%s: %s", msg, err)
}
var err error
// Initializ
err = write(0x05, 0x20)
dieIf(err, "initialization")
decode := func(data []byte) {
if len(data) != 16 {
log.Printf("Only got %d bytes (want 16)", len(data))
}
var (
_ = data[0] // sequence number
_ = data[1] // unknown
btn1 = data[2] // ybxaSM?N S=share, M=Menu, N=Sync
btn2 = data[3] // rlrlRLDU r=R-Stick/Trigger, l=L-Stick/Trigger, R=D-Right, L=D-Left, D=D-Down, U=D-Up
lt = binary.LittleEndian.Uint16(data[4:6]) // left trigger, 0..1024
rt = binary.LittleEndian.Uint16(data[6:8]) // right trigger
lx = int16(binary.LittleEndian.Uint16(data[8:10])) // left stick X, +/- 32768 or so
ly = int16(binary.LittleEndian.Uint16(data[10:12])) // left stick Y
rx = int16(binary.LittleEndian.Uint16(data[12:14])) // right stick X
ry = int16(binary.LittleEndian.Uint16(data[14:16])) // right stick Y
)
// btn1, least to most significant
for i, btn := range []string{
"SYNC", "BTN1|0x02", "MENU", "SHARE",
"A", "X", "B", "Y",
} {
if btn1&(1<<uint(i)) != 0 {
log.Print(btn)
}
}
// btn2, least to most significant
for i, btn := range []string{
"D-Up", "D-Down", "D-Left", "D-Right",
"L-Trigger", "R-Trigger", "L-Stick", "R-Stick",
} {
if btn2&(1<<uint(i)) != 0 {
log.Print(btn)
}
}
if lt > 0 || rt > 0 {
log.Println("LT:", lt, "RT:", rt)
}
abs := func(x int16) int16 {
if x < 0 {
return -x
}
return x
}
if abs(lx) > 4096 || abs(ly) > 4096 || abs(rx) > 4096 || abs(ry) > 4096 {
log.Println("Right:", lx, ly, "Left:", rx, ry)
}
}
for {
tag, _, data, _ := read()
switch tag {
case 0x07:
if len(data) != 4 {
log.Printf("Wanted %d bytes, got %d", 4, len(data))
break
}
if data[2]&0x01 != 0 {
log.Print("GUIDE")
}
case 0x20:
decode(data)
}
}
}
func XBox360(controller *usb.Device, in, out usb.Endpoint) {
// https://github.com/Grumbel/xboxdrv/blob/master/PROTOCOL
const (
Empty byte = iota // 00000000 ( 0) no LEDs
WarnAll // 00000001 ( 1) flash all briefly
NewPlayer1 // 00000010 ( 2) p1 flash then solid
NewPlayer2 // 00000011
NewPlayer3 // 00000100
NewPlayer4 // 00000101
Player1 // 00000110 ( 6) p1 solid
Player2 // 00000111
Player3 // 00001000
Player4 // 00001001
Waiting // 00001010 (10) empty w/ loops
WarnPlayer // 00001011 (11) flash active
_ // 00001100 (12) empty
Battery // 00001101 (13) squiggle
Searching // 00001110 (14) slow flash
Booting // 00001111 (15) solid then flash
)
led := func(b byte) {
out.Write([]byte{0x01, 0x03, b})
}
setPlayer := func(player byte) {
spin := []byte{
Player1, Player2, Player4, Player3,
}
spinIdx := 0
spinDelay := 100 * time.Millisecond
led(Booting)
time.Sleep(100 * time.Millisecond)
for spinDelay > 20*time.Millisecond {
led(spin[spinIdx])
time.Sleep(spinDelay)
spinIdx = (spinIdx + 1) % len(spin)
spinDelay -= 5 * time.Millisecond
}
for i := 0; i < 40; i++ { // just for safety
cur := spin[spinIdx]
led(cur)
time.Sleep(spinDelay)
spinIdx = (spinIdx + 1) % len(spin)
if cur == player {
break
}
}
}
led(Empty)
time.Sleep(1 * time.Second)
setPlayer(Player1)
var b [512]byte
for {
n, err := in.Read(b[:])
log.Printf("read %d bytes: % x [err: %v]", n, b[:n], err)
if err != nil {
break
}
}
/*
time.Sleep(1 * time.Second)
setPlayer(Player2)
time.Sleep(1 * time.Second)
setPlayer(Player3)
time.Sleep(1 * time.Second)
setPlayer(Player4)
time.Sleep(5 * time.Second)
led(Waiting)
*/
var last, cur [512]byte
decode := func() {
n, err := in.Read(cur[:])
if err != nil || n != 20 {
log.Printf("ignoring read: %d bytes, err = %v", n, err)
return
}
// 1-bit values
for _, v := range []struct {
idx int
bit uint
name string
}{
{2, 0, "DPAD U"},
{2, 1, "DPAD D"},
{2, 2, "DPAD L"},
{2, 3, "DPAD R"},
{2, 4, "START"},
{2, 5, "BACK"},
{2, 6, "THUMB L"},
{2, 7, "THUMB R"},
{3, 0, "LB"},
{3, 1, "RB"},
{3, 2, "GUIDE"},
{3, 4, "A"},
{3, 5, "B"},
{3, 6, "X"},
{3, 7, "Y"},
} {
c := cur[v.idx] & (1 << v.bit)
l := last[v.idx] & (1 << v.bit)
if c == l {
continue
}
switch {
case c != 0:
log.Printf("Button %q pressed", v.name)
case l != 0:
log.Printf("Button %q released", v.name)
}
}
// 8-bit values
for _, v := range []struct {
idx int
name string
}{
{4, "LT"},
{5, "RT"},
} {
c := cur[v.idx]
l := last[v.idx]
if c == l {
continue
}
log.Printf("Trigger %q = %v", v.name, c)
}
dword := func(hi, lo byte) int16 {
return int16(hi)<<8 | int16(lo)
}
// +y
// N
// -x W-|-E +x
// S
// -y
dirs := [...]string{
"W", "SW", "S", "SE", "E", "NE", "N", "NW", "W",
}
dir := func(x, y int16) (string, int32) {
// Direction
rad := math.Atan2(float64(y), float64(x))
dir := 4 * rad / math.Pi
card := int(dir + math.Copysign(0.5, dir))
// Magnitude
mag := math.Sqrt(float64(x)*float64(x) + float64(y)*float64(y))
return dirs[card+4], int32(mag)
}
// 16-bit values
for _, v := range []struct {
hiX, loX int
hiY, loY int
name string
}{
{7, 6, 9, 8, "LS"},
{11, 10, 13, 12, "RS"},
} {
c, cmag := dir(
dword(cur[v.hiX], cur[v.loX]),
dword(cur[v.hiY], cur[v.loY]),
)
l, lmag := dir(
dword(last[v.hiX], last[v.loX]),
dword(last[v.hiY], last[v.loY]),
)
ccenter := cmag < 10240
lcenter := lmag < 10240
if ccenter && lcenter {
continue
}
if c == l && cmag == lmag {
continue
}
if cmag > 10240 {
log.Printf("Stick %q = %v x %v", v.name, c, cmag)
} else {
log.Printf("Stick %q centered", v.name)
}
}
last, cur = cur, last
}
controller.ReadTimeout = 60 * time.Second
for {
decode()
}
}