TAS2557: The calibration tools of TAS2557 for factory

Hi Ivan ,

I refer to the TAS2557 Factory Test and Calibration Guide.pdf , and I can not find this file "factorytest_readme.txt" of installation informations.

2 Factory Test Application
For installation and detailed usage, please refer to factorytest_readme.txt.

Could you help to provide it for us, or help to introduce the installation informations?

Thank you.

Jinjia Wu

Hi Ivan ,

I refer to the TAS2557 Factory Test and Calibration Guide.pdf , and I can not find the "factorytest_readme.txt" about installation informations.

2 Factory Test Application
For installation and detailed usage, please refer to factorytest_readme.txt.

Could you help to provide it, or help to introduce the installation informations?

Thank you.
Jinjia Wu

Hi Ivan ,

How to install Factory Test Application for generate a bin file "tas2557_cal.bin".

git.ti.com/.../*

Is integrated this tas2557-ftc driver into the source code, then build in the Factory Test Application into android device after download the image? 
e.g. kernel/msm-4.9/.../tas2557-ftc/ , or vendor/.../tas2557-ftc/?

Thank you. 

Jinjia Wu

Hi Ivan ,

I implemented the driver: git.ti.com/.../ ,and executed successfully.
But when I adjust the volume(adjust ring volume via volume key), the value "DevA Re" will change.
The value of each test is different (as shown in the picture).
I think the value should be not change on the same device.

How to judge whether the calibration data is correct?

Thank you

Jinjia Wu

Hi Jinjia,

What are the volume changes during the tests?

The volume should be set the same as during the speaker characterization.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan ,

The ring volume in Settings/Sound/Ring volume.

Now the value range of DevA Re is not large after we adjust the tas2557evm_aacspk_a.ftcfg.   (8.28~9.27 ohm ==> 7.35~7.37 ohm)

But I find a new issue, tas2557 driver can not find the TAS2557 calibration files ,error msg as below:

12031 06-17 11:43:11.667     0     0 I tas2557 6-004c: TAS2557 calibration file = data/tas2557_cal.bin, handle = -13
12033 06-17 11:43:11.667     0     0 E tas2557 6-004c: TAS2557 cannot open calibration file: data/tas2557_cal.bin
12035 06-17 11:43:11.667     0     0 E tas2557 6-004c: Calibration 0 doesn't exist

And we are sure that the files exist in device.

Please help us to clarify the issue.

Thank you.

Jinjia Wu

Hi Jinjia,

Let me contact our software team on this one. I'll provide comments over the next couple of days.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators