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    Navigation: All forums > Usb > Message List > Message Post

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    From: jfilling at gmail.com<jfilling@g...>
    Date: Tue May 17 00:07:11 CEST 2005
    Subject: [usb] USB list dead?
    Top
    I discovered this issue during testing a while back. The
    USBF_RX_ACK_TO_VAL_FS and USBF_TX_DATA_TO_VAL_FS values in the USB 2.0
    function core are too small. Once I increased these timeouts, the core
    started responding in a more reasonable fashion.


    ----- Original Message -----
    From: Igor Mohor<igor.mohor@g...>
    To:
    Date: Mon Dec 20 18:43:12 CET 2004
    Subject: [usb] USB list dead?

    > Hi, everybody.
    >
    > I sent a question some time ago to this list (see below). Now I'm
    > resending it and wondering if this list is dead or people just too
    > busy to answer.
    > If this doesn't work, I'll send another letter in a "Hello,
    > I'm a
    > student, send results" fasion.
    > Regards,
    > Igor
    > From: Igor Mohor<igor.mohor@g...>
    > Date: Wed Dec 1 14:18:48 CET 2004
    > Subject: [usb] timeout values
    >
    >
    >
    > Hi.
    > Are values used for "RX timeout" OK? The Opencores USB
    > core uses 400
    > ns for HS and and 622 ns for FS. I believe the value should be 816
    > bit
    > times for
    > HS (1.7 us) and 16-18 bit times for FS (1.33 us - 1.5 us).
    > Am I wrong or right?
    > Best regards,
    > Igor
    >
    >

     
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