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timeout slow bluetooth operations

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This commit is contained in:
geeksville 2020-01-26 09:48:25 -08:00
parent 38119a61f6
commit 140c1561c3
4 changed files with 30 additions and 7 deletions
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13
app/src/main/java/com/geeksville/mesh/SyncBluetoothDevice.kt
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@ -26,6 +26,9 @@ class SyncBluetoothDevice(private val context: Context, private val device: Blue
private var pendingReadC: SyncContinuation<BluetoothGattCharacteristic>? = null
private var pendingConnect: SyncContinuation<Unit>? = null
/// Timeout before we declare a bluetooth operation failed
private val timeoutMsec = 30 * 1000L
var state = BluetoothProfile.STATE_DISCONNECTED
private val gattCallback = object : BluetoothGattCallback() {
@ -104,31 +107,31 @@ class SyncBluetoothDevice(private val context: Context, private val device: Blue
lateinit var gatt: BluetoothGatt
fun connect() =
suspend<Unit> { cont ->
suspend<Unit>(timeoutMsec) { cont ->
pendingConnect = cont
gatt = device.connectGatt(context, false, gattCallback)!!
}
fun discoverServices() =
suspend<Unit> { cont ->
suspend<Unit>(timeoutMsec) { cont ->
pendingServiceDesc = cont
logAssert(gatt.discoverServices())
}
/// Returns the actual MTU size used
fun requestMtu(len: Int) = suspend<Int> { cont ->
fun requestMtu(len: Int) = suspend<Int>(timeoutMsec) { cont ->
pendingMtu = cont
logAssert(gatt.requestMtu(len))
}
fun writeCharacteristic(c: BluetoothGattCharacteristic) =
suspend<Unit> { cont ->
suspend<Unit>(timeoutMsec) { cont ->
pendingWriteC = cont
logAssert(gatt.writeCharacteristic(c))
}
fun readCharacteristic(c: BluetoothGattCharacteristic) =
suspend<BluetoothGattCharacteristic> { cont ->
suspend<BluetoothGattCharacteristic>(timeoutMsec) { cont ->
pendingReadC = cont
logAssert(gatt.readCharacteristic(c))
}