示例#1
0
文件: main.go 项目: currantlabs/ble
func cmdRead(c *cli.Context) error {
	if err := doGetUUID(c); err != nil {
		return err
	}
	if err := doConnect(c); err != nil {
		return err
	}
	if err := doDiscover(c); err != nil {
		return err
	}
	if u := curr.profile.Find(ble.NewCharacteristic(curr.uuid)); u != nil {
		b, err := curr.client.ReadCharacteristic(u.(*ble.Characteristic))
		if err != nil {
			return errors.Wrap(err, "can't read characteristic")
		}
		fmt.Printf("    Value         %x | %q\n", b, b)
		return nil
	}
	if u := curr.profile.Find(ble.NewDescriptor(curr.uuid)); u != nil {
		b, err := curr.client.ReadDescriptor(u.(*ble.Descriptor))
		if err != nil {
			return errors.Wrap(err, "can't read descriptor")
		}
		fmt.Printf("    Value         %x | %q\n", b, b)
		return nil
	}
	return errNoUUID
}
示例#2
0
文件: db.go 项目: currantlabs/ble
func newCCCD(c *ble.Characteristic) *ble.Descriptor {
	d := ble.NewDescriptor(ble.ClientCharacteristicConfigUUID)

	d.HandleRead(ble.ReadHandlerFunc(func(req ble.Request, rsp ble.ResponseWriter) {
		cccs := req.Conn().(*conn).cccs
		ccc := cccs[c.Handle]
		binary.Write(rsp, binary.LittleEndian, ccc)
	}))

	d.HandleWrite(ble.WriteHandlerFunc(func(req ble.Request, rsp ble.ResponseWriter) {
		cn := req.Conn().(*conn)
		old := cn.cccs[c.Handle]
		ccc := binary.LittleEndian.Uint16(req.Data())

		oldNotify := old&cccNotify != 0
		oldIndicate := old&cccIndicate != 0
		newNotify := ccc&cccNotify != 0
		newIndicate := ccc&cccIndicate != 0

		if newNotify && !oldNotify {
			if c.Property&ble.CharNotify == 0 {
				rsp.SetStatus(ble.ErrUnlikely)
				return
			}
			send := func(b []byte) (int, error) { return cn.svr.notify(c.ValueHandle, b) }
			cn.nn[c.Handle] = ble.NewNotifier(send)
			go c.NotifyHandler.ServeNotify(req, cn.nn[c.Handle])
		}
		if !newNotify && oldNotify {
			cn.nn[c.Handle].Close()
		}

		if newIndicate && !oldIndicate {
			if c.Property&ble.CharIndicate == 0 {
				rsp.SetStatus(ble.ErrUnlikely)
				return
			}
			send := func(b []byte) (int, error) { return cn.svr.indicate(c.ValueHandle, b) }
			cn.in[c.Handle] = ble.NewNotifier(send)
			go c.IndicateHandler.ServeNotify(req, cn.in[c.Handle])
		}
		if !newIndicate && oldIndicate {
			cn.in[c.Handle].Close()
		}
		cn.cccs[c.Handle] = ccc
	}))
	return d
}
示例#3
0
文件: main.go 项目: currantlabs/ble
func cmdWrite(c *cli.Context) error {
	if err := doGetUUID(c); err != nil {
		return err
	}
	if err := doConnect(c); err != nil {
		return err
	}
	if err := doDiscover(c); err != nil {
		return err
	}
	if u := curr.profile.Find(ble.NewCharacteristic(curr.uuid)); u != nil {
		err := curr.client.WriteCharacteristic(u.(*ble.Characteristic), []byte("hello"), true)
		return errors.Wrap(err, "can't write characteristic")
	}
	if u := curr.profile.Find(ble.NewDescriptor(curr.uuid)); u != nil {
		err := curr.client.WriteDescriptor(u.(*ble.Descriptor), []byte("fixme"))
		return errors.Wrap(err, "can't write descriptor")
	}
	return errNoUUID
}