how to produce audio data in I2S format for TLV320AIC3120

Hi Andrei,

In order to send data in I2S format with the TLV320AIC3120, you must configure the ADC side (record mode) in the codec.

Please see the 5.5.8 ADC setup section and the 5.5.9 Example Register Setup to Record Analog Data Through ADC to Digital Out section for details.

For more information about the Audio Serial Interface Configuration, please see the following document: http://www.ti.com/lit/an/slaa469/slaa469.pdf

I hope this helps you. If you still have questions, please let me know.

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,
Thank you for your response. But this is not what I asked for. I need to produce some data to be transmitted from MCU to codec by I2S port. And codec should play it with speaker. I need the way to produce this data ( looking like 0x43, 0x54, ... ) to put it in code from, for example, MP3 file or some other source. I would like to find some step by step explanation to do this.
Kind regards,
Andrei

Hi Andrei,

I apologize for my misunderstanding.

Please take a look of this document: Interfacing an I2S Device to an MSP430 Device. It describes how to create an I2S-like bus (left-justified mode) from a SPI bus.

The codec must be configured as playback mode with the left-justified protocol. Please see the 5.6.12 DAC Setup section and the 5.6.13 Example Register Setup to Play Digital Data Through DAC and Headphone/Speaker Outputs for details.

I hope this helps you. If you still have questions, please let me know.

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,
Thank you again for such a fast response. I already saw this document (slaa449a). I are correct, it describes the physical connection and firmware configuration. I also already configured the codec itself, so it ready to get the data from my MCU. But I have no data itself to send and this is exactly what I want: some data (to be stored in MCU) in I2S format I can send from MCU to Codec. How can I produce this data from some audio file?
Kind regads,
Andrei

Hi Luis,
Just to make me more clear: I need some PC software/utility that can convert any audio source file(let say in MP3 format) to a file with RAW audio data in I2S format suitable for TLV320AIC3120 codec from TI. I want to know how I should configure this utility to get my codec play this data.
Kind regards,
Andrei

Hi Andrei,

Unfortunately, we don't have much information about that. However, I found the following scripts:

https://e2e.ti.com/support/data_converters/audio_converters/f/64/p/192505/689300#689300

https://e2e.ti.com/support/data_converters/audio_converters/f/64/t/540.

They mention some information about the use of .wav files with digital converters.

I hope this helps you. If you still have questions, please let me know.

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,
So how can you be sure at TI that your codec can actually play some sounds via I2S interface if you have no any way to play any sound from PC inside your device (TLV320AIC3120). I believe, you must have at least testing patterns in I2S format and for sure such an utility for PC. Could you please address this question to some person from support of codec department?
Kind regards,
Andrei Zinenko

Hi, Andrei,

If you're searching for play sounds from the PC to the codec, you may take a look of the TLV320AIC3120EVM. It uses the TAS1020BPFB which is used in applications that require the streaming of digital audio data between the host PC and the speaker system via the USB connection. It can provide the I2S data from the PC.

Additionally, the TLV320AIC3120EVM is used with a graphical user interface to configure the EVM easier.

I hope this helps you. If you still have questions or comments, please let me know.

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,
I already after this stage. I need to check my embedded system. This is why I need the possibility to create I2S audio data. Also my system during its operation planned to play sounds and speech. More than definitely, PC is the easiest way to produce such a sounds and speech.
Kind regards,
Andrei

Hi, Andrei,

Please check the following post: e2e.ti.com/.../156678. It's about the USB to I2S conversion. It could be helpful to create I2S data by the PC.

Best regards,
Luis Fernando Rodríguez S.

Hi Luis,
If I want to use BCLK as a input for PLL and use PLL as a system clock should I provide the BCLK during the configuration stage?
In my case it driven by MSP432 SPI clock line.
Kind regards,
Andrei Zinenko

Hi, Andrei,

Yes, you're right. You must provide the BCLK during the configuration stage. The clock seetings must be programmed before program the processing blocks, the ADC and the DAC.

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,

Thank you for your answer. The question how to produce sample with I2S data is still open for me. I'm trying to get help from our distributor. Hope he could help.

Kind regards,

Andrei

Hi Luis,

At this stage my codec TLV320AIC3120 already connected to the MCU MSP432. So I have no possibility to play sound from PC via USB port. I can only send data from MCU via I2S port to the codec. So I need a tool (utility or just an explanation how to do) to trasform my audio samples from PC into the format my codec can understand. I should save this transformed data inside my embedded project and run it from the MCU in real time to hear the sounds. In your opinion, somebody from TI company could help me?

Kind regards,

Andrei Zinenko

Hi, Andrei,

As the Interfacing an I2S Device to an MSP430 Device Application Report mentions, you can send data from SPI. Have you tried (for example) reading from an SD via SPI and then, sending the data as the application report explains?

Best regards,

Luis Fernando Rodríguez S.

Hi Luis,

It is exactly the way I communicate to the codec. The problem is I have no sample data to send to the codec because I have no way to produce it. And this is exactly my post about. I need the way(software tool, utility and step by step explanation) to produce sample data to send it to the codec. Do you have any supporting persons from codec team. I believe the firmware engineer will be the best. Can you advise me some guy from TI to contact directly, please?

Kind regards,

Andrei Zinenko

hi Andrei,

          hi ,hello,you got any information regarding this mcu to i2s testing,please share me also..i also waiting for that only....