Introduction

CircuitPython driver for the TLV320DAC3100 I2S DAC

Dependencies

This driver depends on:

• Adafruit CircuitPython

• Bus Device

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle or individual libraries can be installed using circup.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-tlv320

To install system-wide (this may be required in some cases):

sudo pip3 install adafruit-circuitpython-tlv320

To install in a virtual environment in your current project:

mkdir project-name && cd project-name
python3 -m venv .venv
source .env/bin/activate
pip3 install adafruit-circuitpython-tlv320

Installing to a Connected CircuitPython Device with Circup

Make sure that you have circup installed in your Python environment. Install it with the following command if necessary:

pip3 install circup

With circup installed and your CircuitPython device connected use the following command to install:

circup install adafruit_tlv320

Or the following command to update an existing version:

circup update

Usage Example

import audiobusio
import audiocore
import board
import digitalio

import adafruit_tlv320

# Reset the DAC before use
reset_pin = digitalio.DigitalInOut(board.D12)
reset_pin.direction = digitalio.Direction.OUTPUT
reset_pin.value = False  # Set low to reset
time.sleep(0.1)  # Pause 100ms
reset_pin.value = True  # Set high to release from reset

i2c = board.I2C()
dac = adafruit_tlv320.TLV320DAC3100(i2c)

# set mclk, sample rate & bit depth
dac.configure_clocks(sample_rate=44100, bit_depth=16)

# use headphones
# helper function for default settings
dac.headphone_output = True
dac.dac_volume = -20  # dB

audio = audiobusio.I2SOut(board.I2S_BCLK, board.I2S_WS, board.I2S_DIN)

Documentation

API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.