Crate tlv320aic23 

TLV230AIC23B Driver

This is driver for the Texas Instruments TLV320AIC23B audio CODEC / amplifier.

Specifically, this driver is for setting the registers in the TLV230AIC23B over I²C - this driver does not handle the digital audio interface (I²S, or similar).

The TLV230AIC23B has the following inputs and outputs:

• Stereo analog Line-level Input
• Mono analog Microphone Input, with optional +20dB boost
• Stereo analog Line-level Output
• Stereo analog Amplified Headphone Output
• Stereo digital Output
• Stereo digital Input

The Codec object must cache the register contents because the TLV320AIC23B only has a write-only interface and you cannot read back any register contents.

Example

You might setup the Codec like this:

let mut codec = tlv320aic23::Codec::new(tlv320aic23::BusAddress::CsLow);
if let Err(e) = codec.reset(&mut i2c) {
    // Codec didn't respond
}
codec.set_digital_interface_enabled(true);
codec.set_dac_selected(true);
codec.set_dac_mute(false);
codec.set_bypass(false);
codec.set_line_input_mute(true, tlv320aic23::Channel::Both);
codec.set_powered_on(tlv320aic23::Subsystem::AnalogDigitalConverter, true);
codec.set_powered_on(tlv320aic23::Subsystem::MicrophoneInput, true);
codec.set_powered_on(tlv320aic23::Subsystem::LineInput, true);
codec.set_headphone_output_volume(50, tlv320aic23::Channel::Both);
codec.set_sample_rate(
    tlv320aic23::CONFIG_USB_44K1,
    tlv320aic23::LrSwap::Disabled,
    tlv320aic23::LrPhase::RightOnHigh,
    tlv320aic23::Mode::Controller,
    tlv320aic23::InputBitLength::B16,
    tlv320aic23::DataFormat::I2s,
);
if let Err(e) = codec.sync(&mut i2c) {
    // Codec didn't respond
}

Structs

Codec

Represents the state inside our TLV230AIC23B chip.

ConfigParams

Describes a specific configuration in terms of MCLK, ADC Sample Rate, and DAC Sample Rate

Enums

AudioInput

Audio input devices available

BusAddress

The TLV230AIC23B has one of two I²C addresses, depending on whether the CS pin is pulled high or low.

Channel

Selects either only the left channel, only the right channel, or both channels together.

DataFormat

How the data is sent over the digital bus

InputBitLength

The size, in bits, of each sample

LrPhase

Control whether LRClk is active high or low

LrSwap

Swap the left and right DAC outputs

Mode

Whether the TLV230AIC23B generates or receives clock signals.

Sidetone

The level of sidetone that is added.

Subsystem

Represents parts of the TLV230AIC23B that we can turn on and off

Constants

CONFIG_USB_8K

Configuration for USB Mode (12 MHz), ADC @ 8 kHz, DAC @ 8 kHz

CONFIG_USB_32K

Configuration for USB Mode (12 MHz), ADC @ 32 kHz, DAC @ 32 kHz

CONFIG_USB_44K1

Configuration for USB Mode (12 MHz), ADC @ 44.1 kHz, DAC @ 44.1 kHz

CONFIG_USB_48K

Configuration for USB Mode (12 MHz), ADC @ 48 kHz, DAC @ 48 kHz

CONFIG_USB_96K

Configuration for USB Mode (12 MHz), ADC @ 96 kHz, DAC @ 96 kHz