/
libusb.go
175 lines (152 loc) · 3.75 KB
/
libusb.go
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package usb
// #cgo pkg-config: libusb
// #include<usb.h>
import "C"
import "unsafe"
import "fmt"
//import "container/list";
func Init() (int, int) {
C.usb_init()
bn := C.usb_find_busses()
dn := C.usb_find_devices()
return int(bn), int(dn)
}
type Info struct {
Bus string
Device string
Vid int
Pid int
}
func Enum() []Info {
fmt.Printf("")
bus := C.usb_get_busses()
n := 0
for ; bus != nil; bus = bus.next {
for dev := bus.devices; dev != nil; dev = dev.next {
n += 1
}
}
infos := make([]Info, n)
bus = C.usb_get_busses()
n = 0
for ; bus != nil; bus = bus.next {
busname := C.GoString(&bus.dirname[0])
for dev := bus.devices; dev != nil; dev = dev.next {
devname := C.GoString(&dev.filename[0])
var info Info
info.Bus = busname
info.Device = devname
info.Vid = int(dev.descriptor.idVendor)
info.Pid = int(dev.descriptor.idProduct)
infos[n] = info
n += 1
}
}
return infos
}
type Device struct {
*Info
handle *C.usb_dev_handle
descriptor C.struct_usb_device_descriptor
timeout int
}
/// open usb device with info
//func Open(info Info) (*Device)
//{
// var rdev *Device = nil;
//
// for bus := C.usb_get_busses() ; bus != nil ; bus=bus.next
// {
// for dev := bus.devices ; dev!=nil ; dev = dev.next
// {
// if int(dev.descriptor.idVendor) == info.Vid &&
// int(dev.descriptor.idProduct) == info.Pid
// {
// h := C.usb_open(dev);
// rdev = &Device{&info,h,dev.descriptor,10000};
// return rdev;
// }
// }
// }
// return rdev;
//}
/// open usb device with info
func Open(vid, pid int) *Device {
for bus := C.usb_get_busses(); bus != nil; bus = bus.next {
for dev := bus.devices; dev != nil; dev = dev.next {
if int(dev.descriptor.idVendor) == vid && int(dev.descriptor.idProduct) == pid {
h := C.usb_open(dev)
rdev := &Device{
&Info{
C.GoString(&bus.dirname[0]),
C.GoString(&dev.filename[0]), vid, pid},
h, dev.descriptor, 10000}
return rdev
}
}
}
return nil
}
func (dev *Device) Close() int {
r := int(C.usb_close(dev.handle))
dev.handle = nil
return r
}
func (dev *Device) String(key int) string {
buf := make([]C.char, 256)
C.usb_get_string_simple(
dev.handle,
C.int(key),
&buf[0],
C.size_t(len(buf)))
return C.GoString(&buf[0])
}
func (self *Device) Vendor() string {
return self.String(int(self.descriptor.iManufacturer))
}
func (self *Device) Product() string {
return self.String(int(self.descriptor.iProduct))
}
func LastError() string {
return C.GoString(C.usb_strerror())
}
func (*Device) LastError() string {
return LastError()
}
func (self *Device) BulkWrite(ep int, dat []byte) int {
return int(C.usb_bulk_write(self.handle,
C.int(ep),
(*C.char)(unsafe.Pointer(&dat[0])),
C.int(len(dat)),
C.int(self.timeout)))
}
func (self *Device) BulkRead(ep int, dat []byte) int {
return int(C.usb_bulk_read(self.handle,
C.int(ep),
(*C.char)(unsafe.Pointer(&dat[0])),
C.int(len(dat)),
C.int(self.timeout)))
}
func (self *Device) Configuration(conf int) int {
return int(C.usb_set_configuration(self.handle, C.int(conf)))
//return int( C.usb_set_configuration( (*C.uint)(123), C.int(conf)) );
}
func (self *Device) Interface(ifc int) int {
return int(C.usb_claim_interface(self.handle, C.int(ifc)))
}
const (
USB_TYPE_STANDARD = (0x00 << 5)
USB_TYPE_CLASS = (0x01 << 5)
USB_TYPE_VENDOR = (0x02 << 5)
USB_TYPE_RESERVED = (0x03 << 5)
)
func (self *Device) ControlMsg(reqtype int, req int, value int, index int, dat []byte) int {
return int(C.usb_control_msg(self.handle,
C.int(reqtype),
C.int(req),
C.int(value),
C.int(index),
(*C.char)(unsafe.Pointer(&dat[0])),
C.int(len(dat)),
C.int(self.timeout)))
}