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USB3.0 test pattern on 66AK2Hxx

Omin Chou
Genius 3555 points

Hi all,

I used 66AK2Hxx for development. However, I studied some discussions about USB3.0 test in e2e.
http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/210251/743938.aspx#743938

The above link mentioned "USB3.0 port did not support test mode", only USB2.0 port supported test mode.

I was confused when I wanted to do eye diagram test on USB3.0 port. How did I generate the test pattern from CPU side?

Thanks in advance.

B.R.

OC

 

  • 0
    TI__Guru* 81335 points

    Hi, 

    Would you like generate test pattern from Linux or Windows?

    How the EVMs USB port is used? 

    Please provide the your test setup diagram. We will work with team and get back to you.

    Thank you.

  • 0 in reply to Raja
    Genius 3555 points

    Hi Rajasekaran,

    Thanks for your reply.

    Either the Linux or Windows were all ok for me. I only had experience on Linux to test USB2.0.

    Let me show you my test steps in another TI's platform.

    (1) High Speed

          # mount -t debugfs none /sys/kernel/debug/

          # echo "force high-speed" > /sys/kernel/debug/musb/testmode

          # echo "F" > /proc/driver/musb_hdrc.0

          # echo "T" > /proc/driver/musb_hdrc.0

    (2) TEST J

          # mount -t debugfs none /sys/kernel/debug/

          # echo "test J" > /sys/kernel/debug/musb/testmode

    (3) TEST K

          # mount -t debugfs none /sys/kernel/debug/

          # echo "test K" > /sys/kernel/debug/musb/testmode

    B.R.

    OC

  • 0 in reply to Omin Chou
    TI__Guru* 81335 points

    Hi OC,

    Looks like test mode support only available for USB2.0. Please refer the USB 3.0 User guide(SPRUHJ7), Section 3.2.3.5 PORTPMSC2 for more information.

    Thank you.

  • 0 in reply to Raja
    Genius 3555 points

    Hi Rajasekaran,

    I checked user guide that did not explain enough to help us to test eye diagram on USB3.0 port.

    Could you kindly help to indicate a appropriate method for USB3.0 eye diagram test?

    Thanks in advance.

    B.R.

    OC

  • 0 in reply to Omin Chou
    TI__Guru* 81335 points

    Hi OC,

    Working with expert to answer this post. Thank you for your patience.

     

  • 0 in reply to Raja
    TI__Intellectual 1805 points

    OC,

    USB3.0 SuperSpeed PHY test is very different from USB2.0's, it is driven by an external tester , which can send test pattern commands to the DUT via Rx/Tx lines during the tests.

    TI has done the Transmitted Eye Test by using a 3rd party's test suite and equipment, which follows the USB3.0 PHY Compliance Test standard. Following is the SuperSpeed Electrical Compliance [Rev 0.79] spec, the TD.1.3 is for the Eye Test, and the test steps are mentioned too:

    8585.PHY_ComplianceTest_Spec09RC5_11_11_2009.pdf

     

    Regards!
    Wen

     

     

  • 0 in reply to Wenzhong Liu
    Genius 3555 points

    Hi Wen,

    Thanks so much for your appropriate reply.

    I'm clear now and will follow your recommendations to test USB3.0 port.  

    B.R.

    OC