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Original question:

TPS65981EVM: Displayport + USB 3 Data

TPS65981EVM: Displayport + USB 3 Data

Viktor Bergen
Prodigy 130 points
Part Number: TPS65981EVM
Other Parts Discussed in Thread: HD3SS460

Hello,

I'm trying to establish a USB3 link with two TPS65981EVM boards as described in the User's Guide SLVUAW8–August 2016 on page 10.
When doing it as shown in the picture below, then it only establishes a USB2 link, but not a USB3 link to a flash drive. I did make sure the Flash Drive is USB3 capable by connecting it directly to the PC.
I set the switches S1 as described and initially used the firmware as was at delivery of the EVM boards.
Since this did only establish a USB2 link I was looking in the TI E2E community and fond this post:
So I tried to download the firmware mentioned there: TPS6581_HD3SS460_DRP_Source_Advanced_3_08.tpl and TPS6581_HD3SS460_UFP_Advanced_3_08.tpl but I could not find these. The Application Customization Tool seems to generate a newer version of it (4_03 instead of 3_08). When trying this, no USB link could be established to the Flash Drive. After that I tried the standard version of DFP and UFP, with this it did again only establish a USB2 link.

Which firmware should I use to establish a USB3 link?

Thank you.

  • 0
    TI__Mastermind 36756 points

    Hi Viktor,

    Did you ensure that the "Multi-function preferred" bit is set in the DisplayPort capabilities register? This would help to ensure that a USB3 mode of DisplayPort mode is entered.

    If this answers your question, PLEASE select This resolved my issue

    Thank you,
    Eric

  • 0 in reply to Eric Beljaars
    Prodigy 130 points
    Hi Eric,

    Thank you for the fast response.
    The recovery flash image does not have the "Multifunction Preferred" bit set. So I modified it and programmed this firmware to both EVM, but with this it did not establish a USB link at all.
    Any suggestions?

    Regards,
    Viktor
  • 0 in reply to Viktor Bergen
    TI__Mastermind 36756 points
    Hi Viktor,

    Can you enter Debug Mode with your EVM and check the Data Status register? You should see if USB3 Connection field is set or not.

    Thank you,
    Eric
  • 0 in reply to Eric Beljaars
    Prodigy 130 points
    Hi Eric,

    the USB flash drive I used until now seems to have a problem with the connection through both EVMs. When connecting it directly, then it is able to establish a USB3 link, but through the EVMs not.
    Now I use a differnt USB flash dive and with the modified firmware that has the "Multifunction Preferred" bit set it does establish a USB3 link through the EVM boards.
    Thank you for your hint.

    Regards,
    Viktor