Reading battery information through adp536x PMIC in Thingy91

[Adeel]

Hi Dev team,

I have been working on a Thingy91and I was trying to read out the battery voltage of the device. 

I was able to do that through the modem using the MODEM_INFO library.

However, I would like to know how could I get the battery information through the adp536x PMIC. 

I tried to search in the adp536x.c file for any relevant functions but could not find any.

Is there any specific function available to read the battery information through the PMIC ?

Regards,

Adeel.

[Carl Richard]

Hi, Adeel!

I've asked the developers about this, but from what I can see it's not implemented. From reading the ADP5360 datasheet it seems like it shouldn't be too much of a challenge to add support for reading the VBAT_READ register. I suggest looking into the source code (adp536x.c) and using the already implemented adp536x_reg_read(...) function.

Best regards,
Carl Richard

[Adeel]

Hi Carl,

Thanks for the lead. I will try this and let you know .

Could you please let me know if you get any word from the developers ?

Regards,

Adeel.

[Carl Richard]

Hi again!

Some work on this actually have been done in the past. I have attached a driver and header file with the required changes implemented, and a module using the driver. Note that this isn't tested with the newest version of NCS/Zephyr, so some changes (especially in the module) are likely required. Notify me if you face any issues!

5633.adp536x_with_battery_monitor.zip

Best regards,
Carl Richard

[Adeel]

Hi Carl,

Thanks for the files. I noticed that the driver and header file that you gave me (of adp536) has some extra functions that are not present in the current adp536 files in the latest version. 

I will try to use the module out and let you know but I was curious to know if there is any specific reason that the library files are different from what it is in NCS v1.5.0 and what you sent me. 

Regards,

Adeel.

[Carl Richard]

Hi again, Adeel!

You are correct. This is code that was meant to be used with the asset_tracker, but it was ultimately left out. Hence, there is no guarantee that it works, but most of it should!

Best regards,
Carl Richard