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Murmur of a technical dude

99 元的 BT Dongle

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Yahoo 拍賣上買的另外一隻新的 USB BT Adaptor,準備是給 windows 使用的,不過順便拿到 Mac OS X 上看看能不能使用。其實 Mac OS X 可以使用,但是不支援 Headset,可以連結到我的 SonyEricsson Z520i 沒問題。先前買給 iBook 用的是 SMC BT-10,這隻就可以使用 Headset。於是找一下差異在哪。99 元這隻的 USB BT Adaptor 是使用 SiliconWave 的晶片,SMC BT-10 是 Cambridge Silicon Radio 的晶片。把手機的 Headset 連線到電腦時,會看到 console 的 dmesg 有這些訊息:

[IOBluetoothSCOAudioDevice][start] 0×23d4c80 (IOService)
[IOBluetoothSCOAudioDevice][initHardware] 0×23d4c80
[IOBluetoothSCOAudioDevice][createAudioEngine]
[IOBluetoothSCOAudioEngine][init]
[IOBluetoothSCOAudioEngine][initHardware] 0×1b41400
[IOBluetoothSCOAudioEngine][pauseAudioEngine] – numActiveClients = 0 – state = 0 – pendingPowerState = 1
[IOBluetoothSCOAudioEngine][createAudioStreams] sampleBuffer = 0xdd0c000 (0×3c00 bytes)
[IOBluetoothSCOAudioEngine][initHardware] – done.
[IOBluetoothSCOAudioEngine][init]
[IOBluetoothSCOAudioEngine][initHardware] 0×1b41400
[IOBluetoothSCOAudioEngine][pauseAudioEngine] – numActiveClients = 0 – state = 0 – pendingPowerState = 1
[IOBluetoothSCOAudioEngine][createAudioStreams] sampleBuffer = 0xdd10000 (0×3c00 bytes)
[IOBluetoothSCOAudioEngine][initHardware] – done.
[IOBluetoothSCOAudioDevice][registerForDeviceNotification]

接著使用內建的 Bluetooth Explorer 把 Local Bluetooth Device Information 叫出來,Extended SCO 和 Transparent SCO 這兩個 Supported Hardware Features 都是黑色的字體。而 SiliconWave 的晶片,這兩個 Features 則都是灰色的,表示不支援。不過至於在 Windows 上是如何支援 headset,就不得而知。

Written by jclin

2006/03/20 於 9:40 下午

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