TLV320AIC23 CODEC driver

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

Changelog

Unreleased Changes

• First version

Licence

Copyright (c) The Neotron Developers, 2023

Licensed under either MIT or Apache-2.0 at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be licensed as above, without any additional terms or conditions.

lib.rs:

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
}