客户常常使用Digital Mic，Qualcomm QCC系列的产品默认都是Analog Mic
这篇就教你怎么把它改成Digital Mic
1. 参考在C:/qtil/ADK_QCC512x_QCC302x_WIN_6.3.0.154/doc/subsystem_config/audio_qcc512x_qcc302x.html里面的DigMic0PioConfig设定
DigMic0PioConfigNumber (psid) | 0x00a2 | 162 | Type | octet_string | Default | DigMic0PioConfig = [ff ff] | Allowed Values | Minimum string length | 2 octets | Maximum string length | 2 octets | PIO configuration for first Digital Mic instance This key defines how pins for first Digital Mic instance (instance 0) are configured. The octet string key value contains a value each for the CLK_OUT & DATA_IN signal lines in that order. Each signal can be specified to use 0x00 - 0x5F: PIO number or If the signal is not required, it should be set to 0xFF: Unused If multiple digital mic instances share the same clock pin, set the CLK_OUT signal on any one of the instances to the required PIO number and set it to Unused on all the other instances. All digital mic channels that share a clock in this way must be placed in a sync group. Also, digital mic endpoints on the instance that defines CLK_OUT should be connected first for the clock to be enabled. |
2. 假设我们选择PIO-18, PIO-19当作CLK和DATA，在subsys3_config1.htf设定如下
2. 在ADK Configuration Tool里面设定Voice Quality和Music Quality为High Quality
3. 勾选Voice Mic 1 Digital
4. 如果要调整Mic gain，可以透过QACT在此调整
以上就大功告成了
来源：https://www.wpgdadatong.com/cn/blog/detail?BID=B1043
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