Quick installation guide to enable the I2S audio output on Ubuntu.

The Stereo Boom Bonnet for C1+/C2

1. Connect the stereo boom bonnet to ODROID-C1+/C2 using an I2C cable, attach a USB keyboard, USB mouse and HDMI monitor, then power up the system.
   
2. Update the System: sudo apt-get update && sudo apt-get dist-upgrade
   
3. To ensure that the stereo boom bonnet kernel modules are loaded on Terminal.
   

   odroid@odroid64:~$ aplay -l
   **** List of PLAYBACK Hardware Devices ****
   card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
     Subdevices: 0/1
     Subdevice #0: subdevice #0
   odroid@odroid64:~$
   odroid@odroid64:~$ sudo modprobe snd-soc-pcm5102
   odroid@odroid64:~$ sudo modprobe snd-soc-odroid-dac
   odroid@odroid64:~$ aplay -l
   **** List of PLAYBACK Hardware Devices ****
   card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   card 1: ODROIDDAC [ODROID-DAC], device 0: I2S.27 pcm5102-0 []
     Subdevices: 1/1
     Subdevice #0: subdevice #0
   odroid@odroid64:~$

4. Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “ODROID-DAC”
   

If you have to load the driver every time whenever your ODROID-C1+/C2 starts, simply you can register the driver into /etc/modules

odroid@odroid64:~$ su
Password:  /* root password is "odroid" */
root@odroid64:/home/odroid# echo "snd-soc-pcm5102" >> /etc/modules
root@odroid64:/home/odroid# echo "snd-soc-odroid-dac" >> /etc/modules
root@odroid64:/home/odroid# exit
exit
odroid@odroid64:~$ 

This adds one line at end of the file, /etc/modules, and load the driver on boot automatically.

Create /etc/asound.conf with the following content:

pcm.!default  {
 type hw card 1
}
ctl.!default {
 type hw card 1
}

Reboot again.

Check, if the sound card is enabled with “aplay -l”:

odroid@odroid64:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ODROIDDAC [ODROID-DAC], device 0: I2S.27 pcm5102-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
odroid@odroid64:~$

The Stereo Boom Bonnet for XU4

Stereo Boom Bonnet support

BLOCK DIAGRAM

Schematic stereo_boom_bonnet.pdf