MIC Services

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Microphone service "mic:u"

Command Header Description
0x00010042 MapSharedMem
0x00020000 UnmapSharedMem
0x00030140 StartSampling
0x00040040 AdjustSampling
0x00050000 StopSampling
0x00060000 IsSampling
0x00070000 GetEventHandle
0x00080040 SetGain
0x00090000 GetGain
0x000A0040 SetPower
0x000B0000 GetPower
0x000C0042 (size, <translate-header>, bufptr) This is a wrapper for CDCMIC command 0x00050042.
0x000D0040 SetClamp
0x000E0000 GetClamp
0x000F0040 SetAllowShellClosed
0x00100040 When the input value is 0, value 1 is written to an u8 MIC module state field. Otherwise, value 0 is written there. Normally the input value is non-zero.

This is an interface for using the MIC hardware via the "cdc:MIC" service and the MIC IO registers.

Only one session can be open for this service total(that is, only one process can use this service at a time).

Encoding

Enum Value
ENCODING_PCM8 0
ENCODING_PCM16 1
ENCODING_PCM8_SIGNED 2
ENCODING_PCM16_SIGNED 3

SampleRate

Enum Value
SAMPLE_RATE_32730 0
SAMPLE_RATE_16360 1
SAMPLE_RATE_10910 2
SAMPLE_RATE_8180 3

See Also

MIC Shared Memory