Add ble.go to factor out platform-independent code.
This commit is contained in:
parent
5955e369e4
commit
2d4f106dd7
246
ble.go
Normal file
246
ble.go
Normal file
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@ -0,0 +1,246 @@
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package ble
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import (
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"fmt"
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"sync"
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"time"
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"git.wow.st/gmp/ble/gatt"
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)
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type PeripheralListItem struct {
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p Peripheral
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seen time.Time
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}
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type Peripherals struct {
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items []PeripheralListItem
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sync.Mutex
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}
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type ConnectionListItem struct {
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p Peripheral
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state chan string
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}
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type Connections struct {
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items []ConnectionListItem
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close chan struct{}
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sync.Mutex
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}
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func (c *Connections) UpdateState(p Peripheral, s string) {
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var ch chan string
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c.Lock()
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for _, item := range c.items {
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if p.Identifier == item.p.Identifier {
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ch = item.state
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}
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}
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c.Unlock()
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ch <- s
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}
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func (ps *Peripherals) Add(x Peripheral) bool {
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ps.Lock()
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defer ps.Unlock()
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found := false
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for n, item := range ps.items {
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if item.p.Identifier == x.Identifier {
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item.p = x
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item.seen = time.Now()
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ps.items[n] = item
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found = true
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break
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}
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}
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if found {
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return false
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}
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//take ownership of this object
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x.Retain()
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item := PeripheralListItem{p: x, seen: time.Now()}
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ps.items = append(ps.items, item)
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return true
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}
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func (cs *Connections) Add(x ConnectionListItem) bool {
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cs.Lock()
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defer cs.Unlock()
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found := false
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for _, item := range cs.items {
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if item.p.Identifier == x.p.Identifier {
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// are we allowed to have multiple connections to the same peripheral?
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return false
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}
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}
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if found {
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return false
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}
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cs.items = append(cs.items, x)
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return true
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}
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type UpdateStateEvent struct {
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State string
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}
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type DiscoverPeripheralEvent struct {
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Peripheral Peripheral
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}
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//FIXME: create a Service type that is platform dependent to make the
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//event platform independent
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type DiscoverServiceEvent struct {
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Peripheral Peripheral
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Gatt gatt.Service
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Service Service
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}
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//FIXME: create a Characteristic type that is platform dependent to make the
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//event platform independent
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type DiscoverCharacteristicEvent struct {
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Peripheral Peripheral
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Gatt gatt.Characteristic
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Service Service
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Characteristic Characteristic
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}
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//FIXME: create a Characteristic type that is platform dependent to make the
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//event platform independent
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type UpdateValueEvent struct {
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Peripheral Peripheral
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Characteristic Characteristic
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Data []byte
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}
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type ConnectEvent struct {
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Peripheral Peripheral
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}
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type ConnectTimeoutEvent struct {
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Peripheral Peripheral
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}
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type UpdageValueEvent struct {
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Peripheral Peripheral
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Characteristic gatt.Characteristic
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}
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func (b *BLE) Events() chan interface{} {
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return b.events
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}
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func (b *BLE) State() string {
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b.Lock()
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defer b.Unlock()
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return b.stringState()
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}
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func (b *BLE) Scan() {
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b.Lock()
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defer b.Unlock()
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if b.readyToScan() {
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b.peripherals.Lock()
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b.peripherals.items = b.peripherals.items[:0]
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b.peripherals.Unlock()
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fmt.Printf("Go: Scanning\n")
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b.scan()
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} else {
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b.wantScan = true
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}
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}
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func (b *BLE) StopScan() {
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b.Lock()
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if !b.ready {
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b.Unlock()
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return
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}
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b.Unlock()
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fmt.Printf("Go: stopping scan\n")
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b.stopScan()
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}
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func connectTracker(b *BLE, x ConnectionListItem) bool {
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fmt.Printf("connectTracker(): %s\n", x.p.Name)
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b.connections.Lock()
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for _, item := range b.connections.items {
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if item.p.Identifier == x.p.Identifier {
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fmt.Printf("connectTracker(): already connecting to %s\n", x.p.Name)
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b.connections.Unlock()
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return true
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}
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}
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b.connections.items = append(b.connections.items, x)
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b.connections.Unlock()
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b.connectPeripheral(x.p)
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cancel := func() {
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b.cancelConnection(x.p)
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b.connections.Lock()
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for n, item := range b.connections.items {
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if item.p.Identifier == x.p.Identifier {
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b.connections.items = append(b.connections.items[:n], b.connections.items[n+1:]...)
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}
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}
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b.connections.Unlock()
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}
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go func() {
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tick := time.NewTicker(time.Second * 5)
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select {
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case <-b.connections.close:
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fmt.Printf("connectTracker(): Closing connection to %s\n", x.p.Name)
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b.cancelConnection(x.p)
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case <-tick.C:
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fmt.Printf("connectTracker(): Connection to %s timed out\n", x.p.Name)
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cancel()
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b.events <- ConnectTimeoutEvent{x.p}
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case state := <-x.state:
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if state == "cancel" {
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cancel()
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}
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fmt.Printf("connectTracker(): state %s\n", state)
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}
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}()
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return true
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}
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func (b *BLE) Connect(p Peripheral) bool {
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b.Lock()
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if !b.ready {
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b.Unlock()
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fmt.Printf("--BLE not ready\n")
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return false
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}
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b.Unlock()
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if p.p == nil {
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var ok bool
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p, ok = b.knownPeripheral(p)
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if !ok {
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return false
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}
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}
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item := ConnectionListItem{p, make(chan string)}
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fmt.Printf("BLE.Connect() calling connectTracker\n")
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return connectTracker(b, item)
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}
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func Disconnect(p Peripheral) {
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b := peripheralLookup(p)
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found := false
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b.connections.Lock()
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for i, item := range b.connections.items {
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if item.p.Identifier == p.Identifier {
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found = true
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b.connections.items = append(b.connections.items[:i], b.connections.items[i+1:]...)
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break
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}
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}
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b.connections.Unlock()
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if !found {
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return
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}
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b.cancelConnection(p)
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}
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319
ble_darwin.go
319
ble_darwin.go
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@ -31,6 +31,9 @@ var cdLookup map[unsafe.Pointer]*BLE
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var pdLookup map[unsafe.Pointer]*BLE
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var pcache map[unsafe.Pointer]*Peripheral
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func peripheralLookup(p Peripheral) *BLE {
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return pdLookup[p.p.Ptr()]
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}
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type State string
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@ -42,6 +45,24 @@ type Peripheral struct {
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p *ns.CBPeripheral
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}
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type Service *ns.CBService
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type Characteristic *ns.CBCharacteristic
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//Init needs to be called before the BLE library can be used. No setup needed
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//on Darwin.
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func Init() {
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}
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func (x *Peripheral) Retain() {
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//NOTE: ns.ObjectAtIndex() calls SetFinalizer for us, which will be a problem
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//later when we call GC(), so we always first clear the finalizer before
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//setting a new one.
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runtime.SetFinalizer(x.p, nil)
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x.p.Retain()
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x.p.GC()
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}
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func peripheralName(p *ns.CBPeripheral) string {
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var ret string
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nsname := p.Name()
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@ -68,125 +89,8 @@ func newPeripheral(x *ns.CBPeripheral) Peripheral {
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return ret
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}
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type PeripheralListItem struct {
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p Peripheral
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seen time.Time
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}
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type Peripherals struct {
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items []PeripheralListItem
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sync.Mutex
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}
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type ConnectionListItem struct {
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p Peripheral
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state chan string
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}
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type Connections struct {
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items []ConnectionListItem
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close chan struct{}
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sync.Mutex
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}
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func (c *Connections) UpdateState(p Peripheral, s string) {
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var ch chan string
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c.Lock()
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for _, item := range c.items {
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if p.Identifier == item.p.Identifier {
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ch = item.state
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}
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}
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c.Unlock()
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ch <- s
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}
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func (ps *Peripherals) Add(x Peripheral) bool {
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ps.Lock()
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defer ps.Unlock()
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found := false
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for n, item := range ps.items {
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if item.p.Identifier == x.Identifier {
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item.p = x
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item.seen = time.Now()
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ps.items[n] = item
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found = true
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break
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}
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}
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if found {
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return false
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}
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//take ownership of this Objective-C object
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x.p.Retain()
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runtime.SetFinalizer(x.p, nil)
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x.p.GC()
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item := PeripheralListItem{p: x, seen: time.Now()}
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ps.items = append(ps.items, item)
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return true
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}
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func (cs *Connections) Add(x ConnectionListItem) bool {
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cs.Lock()
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defer cs.Unlock()
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found := false
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for _, item := range cs.items {
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if item.p.Identifier == x.p.Identifier {
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// are we allowed to have multiple connections to the same peripheral?
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return false
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}
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}
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if found {
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return false
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}
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cs.items = append(cs.items, x)
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return true
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}
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type UpdateStateEvent struct {
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State string
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}
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type DiscoverPeripheralEvent struct {
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Peripheral Peripheral
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}
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type DiscoverServiceEvent struct {
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Peripheral Peripheral
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Gatt gatt.Service
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Service *ns.CBService
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}
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type DiscoverCharacteristicEvent struct {
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Peripheral Peripheral
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Gatt gatt.Characteristic
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Service *ns.CBService
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Characteristic *ns.CBCharacteristic
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}
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type UpdateValueEvent struct {
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Peripheral Peripheral
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Characteristic *ns.CBCharacteristic
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Data []byte
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}
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type ConnectEvent struct {
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Peripheral Peripheral
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}
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type ConnectTimeoutEvent struct {
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Peripheral Peripheral
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}
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type UpdageValueEvent struct {
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Peripheral Peripheral
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Characteristic gatt.Characteristic
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}
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func (b *BLE) Events() chan interface{} {
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return b.events
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}
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func stringState(x ns.CBManagerState) string {
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func (b *BLE) stringState() string {
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x := b.state
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switch x {
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case (ns.CBManagerState)(ns.CBManagerStateResetting):
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return "resetting"
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@ -205,10 +109,16 @@ func stringState(x ns.CBManagerState) string {
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}
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}
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func (b *BLE) State() string {
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b.Lock()
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defer b.Unlock()
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return stringState(b.state)
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func (b *BLE) readyToScan() bool {
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return b.state == (ns.CBManagerState)(ns.CBManagerStatePoweredOn)
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}
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func (b *BLE) scan() {
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b.cm.ScanForPeripheralsWithServices(nil, nil)
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}
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func (b *BLE) stopScan() {
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b.cm.StopScan()
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}
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func (b *BLE) setState(x ns.CBManagerState) {
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@ -217,38 +127,18 @@ func (b *BLE) setState(x ns.CBManagerState) {
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b.state = x
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if b.ready && b.wantScan {
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fmt.Printf("Go: Scanning\n")
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b.cm.ScanForPeripheralsWithServices(nil, nil)
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b.scan()
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b.wantScan = false
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}
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}
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func (b *BLE) Scan() {
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b.Lock()
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defer b.Unlock()
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if b.state != (ns.CBManagerState)(ns.CBManagerStatePoweredOn) {
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b.wantScan = true
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} else {
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b.peripherals.Lock()
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b.peripherals.items = b.peripherals.items[:0]
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b.peripherals.Unlock()
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fmt.Printf("Go: Scanning\n")
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b.cm.ScanForPeripheralsWithServices(nil, nil)
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}
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}
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func (b *BLE) StopScan() {
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b.Lock()
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if !b.ready {
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b.Unlock()
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return
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}
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b.Unlock()
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fmt.Printf("Go: stopping scan\n")
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b.cm.StopScan()
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func (b *BLE) connectPeripheral(x Peripheral) {
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fmt.Printf("BLE.Connect(): calling cm.ConnectPeripheral(%p)\n", x.p.Ptr())
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b.cm.ConnectPeripheral(x.p, nil)
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}
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func CancelConnection(p Peripheral) {
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b := pdLookup[p.p.Ptr()]
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b := peripheralLookup(p)
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if b == nil {
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return
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}
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@ -266,99 +156,24 @@ func CancelConnection(p Peripheral) {
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}
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}
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func connectTracker(b *BLE, x ConnectionListItem) bool {
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fmt.Printf("connectTracker(): %s\n", x.p.Name)
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b.connections.Lock()
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for _, item := range b.connections.items {
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if item.p.Identifier == x.p.Identifier {
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fmt.Printf("connectTracker(): already connecting to %s\n", x.p.Name)
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b.connections.Unlock()
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return true
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}
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}
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b.connections.items = append(b.connections.items, x)
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b.connections.Unlock()
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fmt.Printf("BLE.Connect(): calling cm.ConnectPeripheral(%p)\n", x.p.p.Ptr())
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b.cm.ConnectPeripheral(x.p.p, nil)
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cancel := func() {
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b.cm.CancelPeripheralConnection(x.p.p)
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b.connections.Lock()
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for n, item := range b.connections.items {
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if item.p.Identifier == x.p.Identifier {
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b.connections.items = append(b.connections.items[:n], b.connections.items[n+1:]...)
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}
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}
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b.connections.Unlock()
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}
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go func() {
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tick := time.NewTicker(time.Second * 5)
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select {
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case <-b.connections.close:
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fmt.Printf("connectTracker(): Closing connection to %s\n", x.p.Name)
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b.cm.CancelPeripheralConnection(x.p.p)
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case <-tick.C:
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fmt.Printf("connectTracker(): Connection to %s timed out\n", x.p.Name)
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cancel()
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b.events <- ConnectTimeoutEvent{x.p}
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case state := <-x.state:
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if state == "cancel" {
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cancel()
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}
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fmt.Printf("connectTracker(): state %s\n", state)
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}
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}()
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return true
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func (b *BLE) cancelConnection(p Peripheral) {
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b.cm.CancelPeripheralConnection(p.p)
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}
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func (b *BLE) Connect(p Peripheral) bool {
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b.Lock()
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if !b.ready {
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b.Unlock()
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fmt.Printf("--BLE not ready\n")
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return false
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}
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b.Unlock()
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if p.p == nil {
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func (b *BLE) knownPeripheral(p Peripheral) (Peripheral, bool) {
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fmt.Printf("RetrievePeripheralsWithIdentifiers\n")
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ps := b.cm.RetrievePeripheralsWithIdentifiers(ns.NSArrayWithObjects(ns.NSUUIDAlloc().InitWithUUIDString(ns.NSStringWithGoString(p.Identifier))))
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if x := (int)(ps.Count()); x > 0 {
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fmt.Printf("--found %d\n", x)
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cbp := ps.ObjectAtIndex(0).CBPeripheral()
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//NOTE: ns.ObjectAtIndex() calls SetFinalizer for us, which will be a problem
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||||
//later when we call GC(), so we first clear the finalizer here.
|
||||
runtime.SetFinalizer(cbp, nil)
|
||||
p = newPeripheral(cbp)
|
||||
return newPeripheral(cbp), true
|
||||
} else {
|
||||
fmt.Printf("--none found\n")
|
||||
return false
|
||||
return Peripheral{}, false
|
||||
}
|
||||
}
|
||||
item := ConnectionListItem{p, make(chan string)}
|
||||
fmt.Printf("BLE.Connect() calling connectTracker\n")
|
||||
return connectTracker(b, item)
|
||||
}
|
||||
|
||||
func Disconnect(p Peripheral) {
|
||||
b := pdLookup[p.p.Ptr()]
|
||||
found := false
|
||||
b.connections.Lock()
|
||||
for i, item := range b.connections.items {
|
||||
if item.p.Identifier == p.Identifier {
|
||||
found = true
|
||||
b.connections.items = append(b.connections.items[:i], b.connections.items[i+1:]...)
|
||||
break
|
||||
}
|
||||
}
|
||||
b.connections.Unlock()
|
||||
if !found {
|
||||
return
|
||||
}
|
||||
b.cm.CancelPeripheralConnection(p.p)
|
||||
}
|
||||
|
||||
func updateState(c *ns.CBCentralManager) {
|
||||
func didUpdateState(c *ns.CBCentralManager) {
|
||||
b := cdLookup[c.Ptr()]
|
||||
st := c.CBManager.State()
|
||||
if st == (ns.CBManagerState)(ns.CBManagerStatePoweredOn) {
|
||||
|
|
@ -378,17 +193,17 @@ func updateState(c *ns.CBCentralManager) {
|
|||
}
|
||||
}
|
||||
b.setState(st)
|
||||
b.events <- UpdateStateEvent{State: stringState(st)}
|
||||
b.events <- UpdateStateEvent{State: b.stringState()}
|
||||
}
|
||||
|
||||
func discoverPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral, d *ns.NSDictionary, rssi *ns.NSNumber) {
|
||||
func didDiscoverPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral, d *ns.NSDictionary, rssi *ns.NSNumber) {
|
||||
b := cdLookup[c.Ptr()]
|
||||
peripheral := newPeripheral(p)
|
||||
peripheral.RSSI = (int)(rssi.IntValue())
|
||||
_discoverPeripheral(b, peripheral)
|
||||
_didDiscoverPeripheral(b, peripheral)
|
||||
}
|
||||
|
||||
func _discoverPeripheral(b *BLE, peripheral Peripheral) {
|
||||
func _didDiscoverPeripheral(b *BLE, peripheral Peripheral) {
|
||||
if peripheral.Name == "" {
|
||||
return
|
||||
}
|
||||
|
|
@ -398,7 +213,7 @@ func _discoverPeripheral(b *BLE, peripheral Peripheral) {
|
|||
}
|
||||
}
|
||||
|
||||
func connectPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral) {
|
||||
func didConnectPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral) {
|
||||
fmt.Printf("Did connect peripheral\n")
|
||||
b := cdLookup[c.Ptr()]
|
||||
|
||||
|
|
@ -428,7 +243,7 @@ func connectPeripheral(c *ns.CBCentralManager, p *ns.CBPeripheral) {
|
|||
|
||||
b.connections.UpdateState(peripheral, "connected")
|
||||
b.events <- ConnectEvent{peripheral}
|
||||
fmt.Printf("Go: connectPeripheral returning\n")
|
||||
fmt.Printf("Go: didConnectPeripheral returning\n")
|
||||
}
|
||||
|
||||
func (x Peripheral) DiscoverServices() {
|
||||
|
|
@ -440,7 +255,7 @@ func (x Peripheral) DiscoverServices() {
|
|||
p.DiscoverServices(nil)
|
||||
}
|
||||
|
||||
func discoverServices(p *ns.CBPeripheral, e *ns.NSError) {
|
||||
func didDiscoverServices(p *ns.CBPeripheral, e *ns.NSError) {
|
||||
b := pdLookup[p.Ptr()]
|
||||
fmt.Printf("Did discover services\n")
|
||||
p.Services().ObjectEnumerator().ForIn(func(o *ns.Id) bool {
|
||||
|
|
@ -453,7 +268,7 @@ func discoverServices(p *ns.CBPeripheral, e *ns.NSError) {
|
|||
}
|
||||
return true
|
||||
})
|
||||
fmt.Printf("Go: discoverServices returning\n")
|
||||
fmt.Printf("Go: didDiscoverServices returning\n")
|
||||
}
|
||||
|
||||
func hr(d *ns.NSData) int {
|
||||
|
|
@ -473,7 +288,7 @@ func (p Peripheral) DiscoverCharacteristics(serv *ns.CBService) {
|
|||
p.p.DiscoverCharacteristics(nil, serv)
|
||||
}
|
||||
|
||||
func discoverCharacteristics(p *ns.CBPeripheral, s *ns.CBService, e *ns.NSError) {
|
||||
func didDiscoverCharacteristics(p *ns.CBPeripheral, s *ns.CBService, e *ns.NSError) {
|
||||
b := pdLookup[p.Ptr()]
|
||||
fmt.Printf("Did discover characteristics\n")
|
||||
s.Characteristics().ObjectEnumerator().ForIn(func(o *ns.Id) bool {
|
||||
|
|
@ -488,14 +303,14 @@ func discoverCharacteristics(p *ns.CBPeripheral, s *ns.CBService, e *ns.NSError)
|
|||
}
|
||||
return true
|
||||
})
|
||||
fmt.Printf("Go: discoverCharacteristics returning\n")
|
||||
fmt.Printf("Go: didDiscoverCharacteristics returning\n")
|
||||
}
|
||||
|
||||
func (p Peripheral) SetNotifyValue(c *ns.CBCharacteristic) {
|
||||
p.p.SetNotifyValue(1, c)
|
||||
}
|
||||
|
||||
func updateValue(p *ns.CBPeripheral, chr *ns.CBCharacteristic, e *ns.NSError) {
|
||||
func didUpdateValue(p *ns.CBPeripheral, chr *ns.CBCharacteristic, e *ns.NSError) {
|
||||
b := pdLookup[p.Ptr()]
|
||||
v := chr.Value()
|
||||
b.events <-UpdateValueEvent{
|
||||
|
|
@ -505,33 +320,21 @@ func updateValue(p *ns.CBPeripheral, chr *ns.CBCharacteristic, e *ns.NSError) {
|
|||
}
|
||||
}
|
||||
|
||||
var (
|
||||
hrm_uuid *ns.CBUUID
|
||||
hrv_uuid *ns.CBUUID
|
||||
info_uuid *ns.CBUUID
|
||||
|
||||
gble *BLE
|
||||
)
|
||||
|
||||
func NewBLE() *BLE {
|
||||
ps := Peripherals{items: make([]PeripheralListItem, 0)}
|
||||
ble := &BLE{events: make(chan interface{}), peripherals: ps}
|
||||
gble = ble
|
||||
|
||||
queue := ns.DispatchQueueCreate(ns.CharWithGoString("go_hrm_queue"), nil)
|
||||
|
||||
cd := ns.CBDelegateAlloc()
|
||||
|
||||
cd.CentralManagerDidUpdateStateCallback(updateState)
|
||||
cd.CentralManagerDidDiscoverPeripheralCallback(discoverPeripheral)
|
||||
cd.CentralManagerDidConnectPeripheralCallback(connectPeripheral)
|
||||
cd.PeripheralDidDiscoverServicesCallback(discoverServices)
|
||||
cd.PeripheralDidDiscoverCharacteristicsForServiceCallback(discoverCharacteristics)
|
||||
cd.PeripheralDidUpdateValueForCharacteristicCallback(updateValue)
|
||||
cd.CentralManagerDidUpdateStateCallback(didUpdateState)
|
||||
cd.CentralManagerDidDiscoverPeripheralCallback(didDiscoverPeripheral)
|
||||
cd.CentralManagerDidConnectPeripheralCallback(didConnectPeripheral)
|
||||
cd.PeripheralDidDiscoverServicesCallback(didDiscoverServices)
|
||||
cd.PeripheralDidDiscoverCharacteristicsForServiceCallback(didDiscoverCharacteristics)
|
||||
cd.PeripheralDidUpdateValueForCharacteristicCallback(didUpdateValue)
|
||||
|
||||
hrm_uuid = ns.CBUUIDWithGoString("180D")
|
||||
hrv_uuid = ns.CBUUIDWithGoString("2A37")
|
||||
info_uuid = ns.CBUUIDWithGoString("180A")
|
||||
|
||||
ble.cd = cd
|
||||
if cdLookup == nil {
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user