96 lines
2.1 KiB
Go
96 lines
2.1 KiB
Go
package mavlink
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import (
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"time"
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"gobot.io/x/gobot"
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common "gobot.io/x/gobot/platforms/mavlink/common"
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)
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const (
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// PacketEvent event
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PacketEvent = "packet"
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// MessageEvent event
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MessageEvent = "message"
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// ErrorIOEEvent event
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ErrorIOEvent = "errorIO"
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// ErrorMAVLinkEvent event
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ErrorMAVLinkEvent = "errorMAVLink"
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)
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type Driver struct {
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name string
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connection gobot.Connection
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interval time.Duration
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gobot.Eventer
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}
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type MavlinkInterface interface {
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}
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// NewDriver creates a new mavlink driver.
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//
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// It add the following events:
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// "packet" - triggered when a new packet is read
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// "message" - triggered when a new valid message is processed
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func NewDriver(a BaseAdaptor, v ...time.Duration) *Driver {
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m := &Driver{
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name: "Mavlink",
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connection: a,
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Eventer: gobot.NewEventer(),
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interval: 10 * time.Millisecond,
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}
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if len(v) > 0 {
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m.interval = v[0]
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}
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m.AddEvent(PacketEvent)
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m.AddEvent(MessageEvent)
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m.AddEvent(ErrorIOEvent)
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m.AddEvent(ErrorMAVLinkEvent)
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return m
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}
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func (m *Driver) Connection() gobot.Connection { return m.connection }
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func (m *Driver) Name() string { return m.name }
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func (m *Driver) SetName(n string) { m.name = n }
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// adaptor returns driver associated adaptor
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func (m *Driver) adaptor() BaseAdaptor {
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return m.Connection().(BaseAdaptor)
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}
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// Start begins process to read mavlink packets every m.Interval
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// and process them
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func (m *Driver) Start() error {
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go func() {
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for {
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packet, err := m.adaptor().ReadMAVLinkPacket()
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if err != nil {
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m.Publish(ErrorIOEvent, err)
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continue
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}
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m.Publish(PacketEvent, packet)
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message, err := packet.MAVLinkMessage()
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if err != nil {
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m.Publish(ErrorMAVLinkEvent, err)
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continue
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}
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m.Publish(MessageEvent, message)
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time.Sleep(m.interval)
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}
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}()
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return nil
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}
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// Halt returns true if device is halted successfully
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func (m *Driver) Halt() (err error) { return }
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// SendPacket sends a packet to mavlink device
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func (m *Driver) SendPacket(packet *common.MAVLinkPacket) (err error) {
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_, err = m.adaptor().Write(packet.Pack())
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return err
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}
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