Accessing two channels of i2s

[Kashyap23]

Hi,I am using NRF5340 AUDIO DK BOARD and Ihave been trying to access i2s mic and I want to transfer the mic data to Amplifier .Is it possible to do with single I2s ? As I observe nrf5340  has two channels.If it possible how to configure pins for mic and amplifier as I have been using SCK,SDIN,LRCK but if want to configure for Amplifier what pins can I use for it as it doesn't have other SCK,LRCK pins.And I want to know difference between MCK and SCK in i2s configuration,Ihave attached the i2s configuration below.

[Turbo J]

The I²S peripherial can do both reading and writing at the same time - as long as you use the same clock signal(s).

We would need what I²S mics or codec chips you intend to use in order to help you further.

MCK and SCK are coarsly described in the PS and should appear in the datasheet of your I²S codec.

[Kashyap23]

So will it be possible getting mic data and sending mic data to Amplifier with same SCK,LRCK pins (p0.14,p0.16) for both,because I used SAI protocol in STM there it has 2 Channels of SAI A,SAI B which is two channel ,so it has dedicated pins for each channel where i have used one for MIC data collection and other channel for Amplification .So I want to know how in NRF i2s work with 2 channels where it has single clocks .I am using MIC SPH0645LM4H and Amplifier TAS2562YFPT

[Edvin]

Hello,

I have not tried any of these components. But you want to receive I2S from the microphone, and forward it to the amplifier, right?

The microphone looks pretty straight forward, but I am not sure about the amplifier. It looks like an I2C device, not SPI. Is that right?

Best regards,

Edvin

[Kashyap23]

1.Yes I need to transfer to amplifier  

2.Yes ,It uses I2s Tx for audio and uses I2C for accessing Registers in Amplifier.

I am using sampling rate of 16khz for getting mic data.I want to know how I can achieve getting Mic data and sending to amplifier with this I2S 2-channels of NRF5340 with my sampling rate as per following connection.How I can do this and what type of I2S fmt i need to use as I am getting samples continuously and I need to do amplification for that samples.

[Edvin]

So you are able to sample the microphone, right?

I don't know how this amplifier expects it's data. Does the datasheet of the amp say anything about how it wants it's data?

BR,

Edvin

[Kashyap23]

Amplifier needs PCM data of mic.

Can you please provide me any sorce code how can i able to use 2 channels in I2S one mic and one for transmitting to amplifier.First confirm is nrf having two channels I2S format for config this thing

[Edvin]

PCM and I2S is almost the same thing. An I2S interface will provide you a PCM stream of data. The default Audio example (ncs\nrf\applications\nrf5340_audio) should provide an example how to use both I2S to a microphone and PCM to an output stream, or to a sound device. 

Please check the nRF5340_Audio documentation.

So e.g. the configuration of an Broadcast source should record the audio from somewhere (the microphone) using I2S, and the Broadcast sink will take that data and output it as PCM (via the I2S interface).

Best regards,

Edvin