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developer2
developer2
Senior
July 7, 2017
Question

ULPI read registers

  • July 7, 2017
  • 3 replies
  • 818 views
Posted on July 07, 2017 at 14:43

Hi,

could you help me please to implement reading registers from USB ULPI chip ?

thanks for all replies

Kind regards ...

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    3 replies

    waclawek.jan
    waclawek.jan
    Super User
    July 7, 2017
    Posted on July 07, 2017 at 16:27

    AFAIK there's no provision for direct access (read nor write) of ULPI registers available in the HS_OTG in STM32.

    Disclaimer: I don't use the HS_OTG.

    JW

    developer2
    developer2Author
    Senior
    July 7, 2017
    Posted on July 07, 2017 at 16:37

    i'm trying to solve my issue:

    https://community.st.com/0D50X00009XkiVqSAJ

    and i got idea to read ULPI's registers as basic testcase of communication ... i don't need to read registers during running state ... sufficient for me is to read ULPI vendor id for example and confirm regarding docs ...

    waclawek.jan
    waclawek.jan
    Super User
    July 7, 2017
    Posted on July 07, 2017 at 17:44

    Bitbang the ULPI protocol?

    Sounds like a challenge for real men... should be doable if the PHY's clock can be turned to input...

    JW

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