TPS65987DDKEVM: Get_Battery_Status messages not sent on CC lines

S123

Part Number: TPS65987DDKEVM
Other Parts Discussed in Thread: TPS65981, TPS65987DDK

Tool/software:

I have a TPS65987DDKEVM dev board setup as a source to charge a mobile phone via USB-C.

Using the TPS65981_2_7_8 Application Customization Tool I can't get the chip to send a "Get Battery Status" message (GBaS). When I use the debug feature to send the command I can't see any activity on the CC lines indicating the chip does not attempt to send the message. Why might this be?

Checking the CMD1 register I see "!CMD" which indicates it is not supported.

I have enabled the "Support Battery Status Message" option in the PD3 Configuration Register.

Any ideas what I am missing?

Thanks

7 days ago

0 Aya Khedr 7 days ago

TI__Mastermind 19652 points

Hi,

Thank you for reaching out!

I am looking into the battery status messages.

In the meantime, could you provide more information on your end-application and requirements? Does your design require DisplayPort support?

Best Regards,

Aya Khedr

0 S123 7 days ago in reply to Aya Khedr

Prodigy 10 points

Hi,

My application is I am looking to control the charging of some USB-C devices remotely (phones/laptops) so I need to be able to have full control over the PD and the current supplied. Part of this is I would like to be able to query the battery status of end devices via the get_battery_status command. I don't need DisplayPort support.

Hope this makes sense.

Thanks

0 Aya Khedr 6 days ago in reply to S123

TI__Mastermind 19652 points

Hi,

Thank you for clarifying.

What is the port's maximum power output?

Best Regards,

Aya Khedr

0 S123 6 days ago in reply to Aya Khedr

Prodigy 10 points

I have been testing with a 20v/5A power supply hooked up to the TPS65987DDKEVM dev board.

0 Aya Khedr 3 days ago in reply to S123

TI__Mastermind 19652 points

Hi,

The "Get Battery Status" message (GBaS) does not seem to be supported on the TPS65987DDK.

I will provide more insight on other ways to possibly obtain the port partner's battery status by Wednesday.

Best Regards,

Aya Khedr

0 S123 3 days ago in reply to Aya Khedr

Prodigy 10 points

Interesting, why have the registers in the datasheet then?

Would be very interested in what ideas you come up with. Can you recommend any other dev boards that would work?

Thanks

0 Alex Liu 2 days ago in reply to S123

TI__Genius 9940 points

Hi,

Our device expert will respond as soon as possible. Please expect delays during the Thanksgiving holiday week.

Thank you.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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TPS65987DDKEVM: Get_Battery_Status messages not sent on CC lines