// Claim this interface. Fails if the interface is already claimed by another process.
func (i *Interface) Claim() *UsbError {
if err := returnUsbError(C.libusb_claim_interface(i.handle.handle, i.num)); err != nil {
return err
}
i.claimed++
return nil
}
// Open opens an attached device and claims the interface. To ensure proper
// reference counting, Open must be called within the context of a Walk.
func (d *Device) Open() error {
if err := C.libusb_open(d.dev, &d.handle); err != C.LIBUSB_SUCCESS {
return &libusbError{err}
}
if err := C.libusb_claim_interface(d.handle, interfaceNum); err != C.LIBUSB_SUCCESS {
C.libusb_close(d.handle)
return &libusbError{err}
}
return nil
}
func Start(color chan byte, output chan guinput.KeyEvent) *C.struct_libusb_device_handle {
C.libusb_init(nil)
fmt.Println(KEYMAP[0x21])
key_device_handle := C.libusb_open_device_with_vid_pid(nil, 0x046d, 0xc22d)
//detach any necessary kernel drivers from MY keyboard
if C.libusb_kernel_driver_active(key_device_handle, 0) == 1 {
log.Print("kernel driver active on main interface")
e := C.libusb_detach_kernel_driver(key_device_handle, 0)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
if C.libusb_kernel_driver_active(key_device_handle, 1) == 1 {
fmt.Println("kernel driver active")
e := C.libusb_detach_kernel_driver(key_device_handle, 1)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
//Claim the interfaces we'll be listening on
r := C.libusb_claim_interface(key_device_handle, 0)
if r != 0 {
log.Fatal("Can't claim main interface")
}
r = C.libusb_claim_interface(key_device_handle, 1)
if r != 0 {
log.Fatal("Can't claim special interface")
}
log.Print("Starting libusb goroutines\n")
go ColorChange(key_device_handle, color)
//go LCDChange(key_device_handle, lcd)
go NormalKeyMonitor(key_device_handle, output)
go SpecialKeyMonitor(key_device_handle, output)
log.Print("Libusb Goroutines started\n")
return key_device_handle
}
// First returns the first supported device attached to the host. Unlike Walk,
// the returned Device is opened automatically. This function exists primarily
// for testing.
func First() (*Device, error) {
handle := C.libusb_open_device_with_vid_pid(context, idVendor, idProduct)
if handle == nil {
return nil, errors.New("no devices found")
}
if err := C.libusb_claim_interface(handle, interfaceNum); err != C.LIBUSB_SUCCESS {
C.libusb_close(handle)
return nil, &libusbError{err}
}
return &Device{
dev: C.libusb_get_device(handle),
handle: handle,
}, nil
}
func StartLibUsb() error {
Connected = true
key_device_handle := C.libusb_open_device_with_vid_pid(nil, 0x046d, 0xc22d)
if key_device_handle != nil {
if C.libusb_kernel_driver_active(key_device_handle, 1) == 1 {
e := C.libusb_detach_kernel_driver(key_device_handle, 1)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
r := C.libusb_claim_interface(key_device_handle, 1)
if r != 0 {
log.Fatal("Can't claim special interface")
}
keyboardHandle = key_device_handle
return nil
}
return errors.New("could not open driver")
}
// Claim an interface on a given device handle.
func (h *DeviceHandle) ClaimInterface(num byte) error {
return toErr(C.libusb_claim_interface(h.me(), C.int(num)))
}
func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error) {
end := &endpoint{
Device: d,
}
var setAlternate bool
for _, c := range d.Configs {
if c.Config != conf {
continue
}
debug.Printf("found conf: %#v\n", c)
for _, i := range c.Interfaces {
if i.Number != iface {
continue
}
debug.Printf("found iface: %#v\n", i)
for i, s := range i.Setups {
if s.Alternate != setup {
continue
}
setAlternate = i != 0
debug.Printf("found setup: %#v [default: %v]\n", s, !setAlternate)
for _, e := range s.Endpoints {
debug.Printf("ep %02x search: %#v\n", epoint, s)
if e.Address != epoint {
continue
}
end.InterfaceSetup = s
end.EndpointInfo = e
switch tt := TransferType(e.Attributes) & TRANSFER_TYPE_MASK; tt {
case TRANSFER_TYPE_BULK:
end.xfer = bulk_xfer
case TRANSFER_TYPE_INTERRUPT:
end.xfer = interrupt_xfer
case TRANSFER_TYPE_ISOCHRONOUS:
end.xfer = isochronous_xfer
default:
return nil, fmt.Errorf("usb: %s transfer is unsupported", tt)
}
goto found
}
return nil, fmt.Errorf("usb: unknown endpoint %02x", epoint)
}
return nil, fmt.Errorf("usb: unknown setup %02x", setup)
}
return nil, fmt.Errorf("usb: unknown interface %02x", iface)
}
return nil, fmt.Errorf("usb: unknown configuration %02x", conf)
found:
// Set the configuration
var activeConf C.int
if errno := C.libusb_get_configuration(d.handle, &activeConf); errno < 0 {
return nil, fmt.Errorf("usb: getcfg: %s", usbError(errno))
}
if int(activeConf) != int(conf) {
if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
}
}
// Claim the interface
if errno := C.libusb_claim_interface(d.handle, C.int(iface)); errno < 0 {
return nil, fmt.Errorf("usb: claim: %s", usbError(errno))
}
// Increment the claim count
d.lock.Lock()
d.claimed[iface]++
d.lock.Unlock() // unlock immediately because the next calls may block
// Choose the alternate
if setAlternate {
if errno := C.libusb_set_interface_alt_setting(d.handle, C.int(iface), C.int(setup)); errno < 0 {
debug.Printf("altsetting error: %s", usbError(errno))
return nil, fmt.Errorf("usb: setalt: %s", usbError(errno))
}
}
return end, nil
}
func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error) {
end := &endpoint{
Device: d,
}
for _, c := range d.Configs {
if c.Config != conf {
continue
}
fmt.Printf("found conf: %#v\n", c)
for _, i := range c.Interfaces {
if i.Number != iface {
continue
}
fmt.Printf("found iface: %#v\n", i)
for _, s := range i.Setups {
if s.Alternate != setup {
continue
}
fmt.Printf("found setup: %#v\n", s)
for _, e := range s.Endpoints {
fmt.Printf("ep %02x search: %#v\n", epoint, s)
if e.Address != epoint {
continue
}
end.InterfaceSetup = s
end.EndpointInfo = e
switch tt := TransferType(e.Attributes) & TRANSFER_TYPE_MASK; tt {
case TRANSFER_TYPE_BULK:
end.xfer = bulk_xfer
case TRANSFER_TYPE_INTERRUPT:
end.xfer = interrupt_xfer
case TRANSFER_TYPE_ISOCHRONOUS:
end.xfer = isochronous_xfer
default:
return nil, fmt.Errorf("usb: %s transfer is unsupported", tt)
}
goto found
}
return nil, fmt.Errorf("usb: unknown endpoint %02x", epoint)
}
return nil, fmt.Errorf("usb: unknown setup %02x", setup)
}
return nil, fmt.Errorf("usb: unknown interface %02x", iface)
}
return nil, fmt.Errorf("usb: unknown configuration %02x", conf)
found:
// Increment the claim count
d.lock.Lock()
defer d.lock.Unlock()
// Only claim when needed
if d.claimed[iface] <= 0 {
// Set the configuration
if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
}
fmt.Printf("claiming interface %v", iface)
// Claim the interface
if errno := C.libusb_claim_interface(d.handle, C.int(iface)); errno < 0 {
return nil, fmt.Errorf("usb: claim: %s", usbError(errno))
d.claimed[iface]++
}
// Choose the alternate
// if errno := C.libusb_set_interface_alt_setting(d.handle, C.int(iface), C.int(setup)); errno < 0 {
// // This doesn't seem to work on Mac OS X, it works on my Ubuntu machine.
// log.Printf("ignoring altsetting error: %s", usbError(errno))
// }
}
return end, nil
}