TAS5822MEVM: TAS5822M

Jesscarlo Magboo

Part Number: TAS5822MEVM
Other Parts Discussed in Thread: TAS5822M,

Tool/software:

Hello,

We are designing a device where we use the class-D audio amplifier TAS5822M to drive a speaker of 8ohms. The audio amplifier is configured by a microcontroller of our choosing.

We bought and tried the amplifier's evaluation board TAS5822MEVM and requested the necessary software to interface with it.

We configured the evaluation board for our custom application and we obtain the I2C dump to configure the audio amplifier.

As of now we are writing a driver for our microcontroller to do the same I2C command for the amplifier's configuration.

All is well but there are few commands which are not documented in neither TAS5822M data sheet nor in SLOA263A - revised 2019 (Process flow).

Such I2C commands are as follows:

w 58 00 00
w 58 7f 00 # book 00 (register map of tas5822 from its data sheet)
w 58 46 01 # write in register 46 the value 01

In the data sheet TAS5822M, there is no 46h offset in the register map.

w 58 00 00
w 58 7f 8c                     # book 8c
w 58 00 2d                    # page 2d
w 58 08 00 00 04 00     # write on register 08 the value 00 00 04 00
w 58 0c 00 00 00 00      # write on register 0c the value 00 00 04 00

In the process flow SLOA263A, there are no registers such as 08 or 0c in page 2d of book 8c according to the register map.

It is necessary to know the details of such commands for our documentation.

I attached the I2C dump as file.cfg

configAmpl.cfg

Thank you and I look forward to your reply

6 months ago

0 Jesse Ji 6 months ago

TI__Mastermind 20541 points

hi Magboo

in fact, usually we recommend using the GUI to generate the corresponding config script for the device.

some registers cannot be shared in detail.

how about using the i2c log to get the corresponding config script you want, then you can using those script to config what you want.

thanks

jesse

/cfs-file/__key/communityserver-discussions-components-files/6/How-to-use-i2c-log-to-get-module-config-file.pdf

0 Jesscarlo Magboo 6 months ago in reply to Jesse Ji

Prodigy 10 points

Hello,

Jesse Ji > how about using the i2c log to get the corresponding config script you want, then you can using those script to config what you want.

That is what we did and we got the script. We just need to know which registers corresponds to which functions.

Almost everything is written in the data sheet and the process flow, except the 3 commands I mentioned above.

For this project, the information of the registers is necessary for proper documentation.

In case that this should be communicated privately, would you kindly indicate how to ask technical support in private?

Thank you

0 Jesse Ji 6 months ago in reply to Jesscarlo Magboo

TI__Mastermind 20541 points

hi Magboo

if you mean below 3 lines, the description is as below:
w 58 46 01 # coefficents select in the ROM

another 2 cmd, i cannot find where it shows in the output cfg file.

can you share your full config file and ppc3 file?

thanks

jesse

+1 Jesscarlo Magboo 6 months ago in reply to Jesse Ji

Prodigy 10 points

config.cfg

my_config.cfg

file.ppc3

/cfs-file/__key/communityserver-discussions-components-files/6/tas5822config.txt

I am having trouble uploading the .ppc3 file. I renamed the ppc3 file into a text file by changing the extension from .ppc3 to .txt and I uploaded it. It should work by renaming it again as tas5822config.ppc3 and then open it in pure path console.

Another question:

Using the configuration which I attached. The I2C command for the configuration has 400+ commands.

Is it necessary to write all 400+ commands to get the TAS5822M to work?

thank you!

0 Wenbin Li1 6 months ago in reply to Jesscarlo Magboo

TI__Expert 3140 points

Hi Magboo,

in fact, I used your ppc3 file to generate the cfg file in below method which is common used, there is some difference to your cfg file. you can check this method.

and regarding the 400+ commands, you can delete most of them. one quick way is that you can generate only active modules in below methods:

Br,

Wenbin

Audio

Audio forum

TAS5822MEVM: TAS5822M

Thank you and I look forward to your reply