i2s connection to an external DAC

[jazzaj]

Hi all,

Today, I tried to connect my RPI2B to my DAC, an Audio-gd NFB1 (ES9018), via the i2s input of the DAC (RJ45).

According to the Audio-gd website, the RJ45 use the follow pins define :

Pin 1 : SDATA
Pin 3 : LRCK
Pin 5 : SCLK
Pin 7 : MCLK
Pin 2,4,6,8 GND
ES9018 doesn't need MCLK and Audio-gd asks to cut the MCLK wire in the source and connect to GND, so the schema become :

For the RPI2B i2s output, I follow the schema on Archpile website :


I used a short cat7 cable (10cm) with this schema :
RJ45 > GPIO
Pin 1 (SDATA) Pin 40
Pin 3 (LRCK) Pin 35
Pin 5 (SCLK/BCK) Pin 12
Pin 2,4,6,7,8 (GND) all on Pin 39

Once the cable connect to the GPIO and the DAC, I tried to play Runeaudio... but without success because I can't choose the proper MPD Audio output interface.
In config.txt, I uncommented the line "device_tree_param=i2s=on" and, one after the other, the lines of audio interfaces, but each time, after reboot, I can't see none of the i2s audio interface.

Any idea ?

[hondagx35]

[jazzaj]

Hi Franck,

Tried another time this morning, i2s comment, hifiberry digi uncomment, and still no new interface except Amanero (USB DAC), RPI analog output, RPI HDMI output...

Here the debug data :

[hondagx35]

[jazzaj]

Ok. This time I can access to the hifiberry-dac but not the iqaudio-dac.
I can play music too but no sound. If I switch to amanero from the mpd audio interface, sound is recover.

Looking to the hifiberry website, it appears that the hifiberry-dac is only running on RPI1, I have RPI2. So I tried to choose hifiberry-dac+ in config.txt, but I can't see this interface (like iqaudio-dac) in the mpd tab.

And yes, I had to manualy config my wifi. I can't remember exactly what was the problem on the first install : can't access to RPI wifi or via the ethernet ?!?

[hondagx35]

Hi jazzaj,

sorry my fault.
The iqaudio-dac also uses I2C and therefor needs the appropriate hardware to work.
So the hifiberry-dac seems the only that will work in your case.

An other possibility is to disable device tree and load the needed modules the old way.

Frank

[jazzaj]

[nfb29]

Hello everybody ,

I am also looking for a way to connect my Audio-GD NFB29 with the RaspberryPi 2 on the I2S interface .

About the USB Port everything runs properly.

In the following lines /boot/config.txt I commented out :
device_tree_param = I2S = on
device_tree_overlay = hifiberry - DAC

Then i can select Hifiberry DAC as an audio output interface also, but hear no sound .

Am I on the right track , or I may have another module use ?

[popov]

Hi

Found this, https://volumio.org/forum/es9018k2m-t1218-20.html
This is the old way, but no I2c

Regards

[nfb29]