This describes the audio-driver for the UCB1400-codec found on the Trizeps-module.
Registry Keys
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|---|---|---|
Key | Type | Description |
MuteMode | DWORD | How to mute the device during no audio ouput. (see Mute Settings) |
MutePortAdr | DWORD | Address to write to, if MUTE_PORTADR is used. (see Mute Settings) |
MutePortSize | DWORD | Bus-width, if MUTE_PORTADR is used. (see Mute Settings) |
MutePortMute | DWORD | Value to write for mute, if MUTE_PORTADR is used. (see Mute Settings) |
MutePortUnMute | DWORD | Value to write for unmute, if MUTE_PORTADR is used. (see Mute Settings) |
MuteGPIOPin | DWORD | GPIO-Pin to use, if MUTE_GPIOPIN is used. (see Mute Settings) |
BassTreble | DWORD | Value to use for CSR1 register of UCB1400 |
Priority256 | DWORD | priority used for driver-threads |
InputSource | DWORD | Source of audio-input: 1: MIC, 2: LINE_IN |
CaptureLatency | DWORD | Capture-buffer-size in milliseconds. When using VOIP-applications, reducing capture-latency might be wanted. |
PlayLatency | DWORD | Play-buffer-size in milliseconds. When using VOIP-applications, reducing play-latency might be wanted. |
RecordGain | DWORD | See Record Gain Register (0x1C) of UCB1400-codec. Bits 0..7 are the gain setting for the right channel; bits 8..15 for the left channel. |
MicVolume | DWORD | See MIC Volume Register (0x0E) of UCB1400-codec. Set bit 6 (0x40) to enable 20dB boost |
WM9715ALC | DWORD | See ALC-Registers (0x60,0x62) of WM9715L-codec. The upper 16 bits are written to Reg60h, the lower to Reg62h. Default-value if not set is 0xB0323E00. |
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|---|---|---|
Key | Type | Description |
Volume | DWORD | Volume: bits0..15 left channel; bits16..32 right channel |
Mute Settings
There are many mute-modes availlable, which may be set through the MuteMode-registry key. The audio-output is unmuted and muted automatically before and after playing sound-files. Multiple mute-modes may be selected by setting the appropiate flags:
MUTE_HPEN (0x01)MUTE_MASTER (0x02)MUTE_VOLUME (0x04)MUTE_DRVLIB (0x08)MUTE_PORTADR (0x10)MUTE_GPIOPIN (0x20)
MUTE_HPEN
Enable and disable headphone-driver.
MUTE_MASTER
Use master-mute bit in master-volume-register (0x02) of UCB1400.
MUTE_VOLUME
Change volume for muting.
MUTE_DRVLIB
This calls a drvlib function to mute the device.
The drvlib writes to a board-control-register.
MUTE_PORTADR
Write to register defined through MutePortAdr. MutePortAdr is a static virtual address.MutePortSize can be 2 (16bit) or 4 (32bit) depending on the bus-width of MutePortAdr. MutePortMute is written to MutePortAdr if the device is muted. MutePortUnMute is written to MutePortAdr id the device is unmuted.
MUTE_GPIOPIN
Toggles the gpio-pin given with MuteGPIOPin.
0V on gpio: device muted.
3.3V on gpio: device not muted.
If bit 0x100 is set in MuteGPIOPin, the logic is inversed.