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Original question:

TPS25763-Q1: USB3 DFP with DP AltMode possible?

TPS25763Q1EVM: TPS25763Q1EVM:

user4019333
Prodigy 225 points
Part Number: TPS25763Q1EVM
Other Parts Discussed in Thread: TPS257XX-Q1-GUI, TPS25763-Q1

Tool/software:

Hello,

I got my TPS25763Q1EVM a couple weeks ago, it worked good in DP ALT mode in the past two weeks.

And then I requested the  "TPS257xx-Q1 design resources" for futher development. My request had been approved in a couple days and I got the link to download those files. 

But I found that the EVM can't work at DP ALT mode anymore after the example firmware "F411_04_01_0005_ReleaseFiles\Example files\TPS25763D-Q1\Using I2C to MUX\TPS25763DQ1_V8.03_60W_DRP_I2C_full_flash.bin"  had been download onto it's EEPROM Flash. I had tried a lot of configurations by using TPS257xx-Q1-GUI but still failed to make it work.

My question is, how can I get the exact firmware ( and also it's configuration files) that had been pre-loaded onto the EVM before exfactory? Looks like this is the fast way I can bring it back to work again.

Thank you!
Sam

  • 0
    TI__Genius 12840 points

    Hi Sam,

    Please try the .bin attached below.  I believe this is the factory image - I don't have config file on hand.  Please verify the jumpers on the right side of the board align with your configuration.  For example, if you are using I2C to control the MUX, make sure the jumper is set to enable I2C, connect SCL/SDA, etc.

    Regards,
    Eric

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/TPS25763D_5F00_F411_5F00_04_5F00_01_5F00_60W_5F00_FullRegion.bin

  • 0 in reply to Eric Hartigan
    Prodigy 225 points

    Hi Eric,

    Thanks for your help.
    I download the factory image onto the EVM, it brings it back to work with computer at DP alt mode flawlessly!!
    I have an interesting finding that the size of factory image .bin is 9 KB, but the size of the image .bin that I build from TPS257xx-Q1-GUI come up to 26KB. (The size of .bin in design resources is 26KB as well). The size is quite different from the factory image.

    But unfortunately, I can't use factory image on my product directly, I need to know how to build a working image from GUI for my projects.

    I had double checked all the jumpers, and I am pretty sure they are correct. 

    To be more details, the image built from GUI works on cell phone charging but failed to work with computer at DP alt mode. I had tried it on several computers and have no luck to make it work. I use type-c analyzer to capture the communication between computer and tps25763-q1 and found that it never sends source capability SOP to computer, attached image for reference. So, I am pretty sure that the image built from GUI doesn't work in this case.

    It would be really appreciated if you can find the configuration files for factory image, thank you!

  • 0 in reply to user4019333
    TI__Genius 12840 points

    Understood on the need.  Rather than hunt down and share the old config, I'd prefer to confirm the function with the latest base firmware.  Can you share your config file?  I will look for any potential issues, and if I can't find any will work on a new config to share here.

    Thanks,
    Eric

  • 0 in reply to Eric Hartigan
    Prodigy 225 points

    Thanks Eric.

    I use the example config in the design resources folder for testing. I didn't make any changes on it yet.

    This is the config for reference:

    Thanks

    TPS25763DQ1_V8.03_60W_DRP_GPIO.zip

  • +1 in reply to user4019333
    TI__Genius 12840 points

    Hello,

    I confirmed the .json is working on my EVM a the TI lab.  Here are a few things to check:

    Jumpers on the right half of the board:
    J16 EITHER
    J21 TOP
    J20 BOTTOM
    J22 BOTTOM
    J1 TOP
    J2 TOP

    Also please be sure that R8 is populated with 100ohms per EVM User's Guide figure 4-2.  I believe this is the key item.  This would explain your PD log - the computer is connecting as the source and TPS25763-Q1 will only respond if 5V is present at the VBUS pin.  Without R8, 5V will be blocked by FET Q1.  Thus, there will be no GoodCRC sent back to the computer.

    Regards,
    Eric

  • 0 in reply to Eric Hartigan
    Prodigy 225 points

    Thanks Eric. I hand solder R8 with a 100ohms resistor, everything works perfectly. Thank you very much for your help.

  • 0 in reply to user4019333
    TI__Genius 12840 points

    Glad it worked out!