如何设置Android系统中的BT2.1 device到SSP的DEBUG模式

可以在ADB shell中通过HCI command命令来实现，如下：

//打开SSP的debug模式

#> hcitool cmd 0x06 0x04 0x01

< HCI Command: ogf 0x06, ocf 0x0004, plen 1

01

> HCI Event : 0x0e plen 4

01 04 18 00

//关闭SSP的debug模式

#> hcitool cmd 0x06 0x04 0x00

具体定义可以参考BT2.1的spec的vol 2的7.6.4章节。
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