Connections for I2S echo sample

RE: Connections for I2S echo sample

AHaug — Wed, 10 Jul 2024 13:32:35 GMT

Noted. Then the next item for you to verify is where the signal stops, i.e between DK and amp or from amp to speaker or if any of the cables are not working. The thing to verify after this is if you're able to get any other basic I2S implementations/samples up and running.

Could you also share any .dts and overlay files?

Kind regards,
Andreas

RE: Connections for I2S echo sample

SohamGhugare — Wed, 10 Jul 2024 11:18:12 GMT

[quote userid="107683" url="~/f/nordic-q-a/112668/connections-for-i2s-echo-sample/492988"]If you have a logic analysator at hand, could you verify that the output on the I2s matches what your observing?[/quote]

No, thats what I said in my previous replies. I'll quote it below for your reference too...

[quote userid="134083" url="~/f/nordic-q-a/112668/connections-for-i2s-echo-sample/492242"]

I tried recording the signal with the help of an digital oscillator. This is what I got:

The DIN, BCLK and LRC pins have 1.3 MHz signal, and DOUT has 460-470 KHz signal. I tried changing the frequency of the sine wave that is being generated but that didn't change anything

[/quote]

The I2S code just doesn't work as intended.

RE: Connections for I2S echo sample

AHaug — Tue, 09 Jul 2024 13:30:15 GMT

Hi,

Edvin is on vacation so I will be handling this case while they are OoO.

If you have a logic analysator at hand, could you verify that the output on the I2s matches what your observing?

Kind regards,
Andreas

RE: Connections for I2S echo sample

SohamGhugare — Tue, 09 Jul 2024 06:22:41 GMT

Yes, there's some white noise occasionally on the speakers, however I'm not sure if the white noise is due to the program or just leakage current.

Here are the images of my connections.

I have mentioned all of the Pin Connections on the Amp and the Audio DK in the original question above.

RE: Connections for I2S echo sample

Edvin — Fri, 05 Jul 2024 22:30:08 GMT

Ok, so the amplifier should receive data. Did you connect the amplifier to an actual speaker? Is there any movement on the speaker's analogue wires? Do you hear anything at all?

Perhaps you can share some photos/diagrams on how you connected the amplifier and speaker?

BR,
Edvin

RE: Connections for I2S echo sample

SohamGhugare — Thu, 04 Jul 2024 12:14:12 GMT

Yes, I tried recording the signal with the help of an digital oscillator. This is what I got:

The DIN, BCLK and LRC pins have 1.3 MHz signal, and DOUT has 460-470 KHz signal. I tried changing the frequency of the sine wave that is being generated but that didn't change anything.

[quote userid="26071" url="~/f/nordic-q-a/112668/connections-for-i2s-echo-sample/492130"]What HW are you testing this on? nRF5340 audio DK? nRF5340 DK? Custom board?[/quote]

I'm using a nRF5340 Audio DK for my development

RE: Connections for I2S echo sample

Edvin — Wed, 03 Jul 2024 21:08:48 GMT

Hello,

Sorry for the late reply.

[quote user=""]However, I'm facing issues interfacing the speaker now as I cannot hear anything from the speaker and it seems the data is being sent properly as there are no errors.[/quote]

Have you tried capturing a logic trace on the I2S pins for the speaker using a logic analyzer? Just to check that there actually is data coming on these pins?

What HW are you testing this on? nRF5340 audio DK? nRF5340 DK? Custom board?

Best regards,

Edvin