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TI Home » TI E2E Community » Support Forums » Digital Signal Processors (DSP) » DaVinci™ Video Processors » DM814x and AM387x Processors Forum » 8147 lost interrupt
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8147 lost interrupt

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ting zhang76616
Posted by ting zhang76616
on Jun 01 2012 22:48 PM
Prodigy90 points

Do anybody meet this:8147 lost hwi?

I use  edma to copy data,but sometime cann't get edma complete interrupt to release semphore,so dsp will blocked.

In which situation can 8147 lost hwi?

814x 8127
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  • ting zhang76616
    Posted by ting zhang76616
    on Jun 03 2012 21:43 PM
    Prodigy90 points

    somebody help me ,thank you

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  • Andrew Elder
    Posted by Andrew Elder
    on Jun 04 2012 11:38 AM
    Intellectual710 points

    I don't think it is a good idea to use semaphores inside a HWI.

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  • HardikShah
    Posted by HardikShah
    on Jun 04 2012 22:57 PM
    Mastermind20155 points

    Hi,

    Semaphores can be used in HWI, you can only post a semaphore in HWI, you cannot pend on semaphore on HWI since it may sleep, and which in turn can create a deasdlock of the system.

    Regards,

    Hardik Shah

    Regards,

    Hardik Shah




    Please mark this post as answered via the Verify Answer button below if you think it answers your question.  Thanks!

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  • ting zhang76616
    Posted by ting zhang76616
    on Jun 05 2012 19:51 PM
    Prodigy90 points

    I think so.

    but I cann't understand  HWI just be losted

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  • Andrew Elder
    Posted by Andrew Elder
    on Jun 06 2012 07:46 AM
    Intellectual710 points

    Does it sometimes work ?

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  • ting zhang76616
    Posted by ting zhang76616
    on Jun 06 2012 20:02 PM
    Prodigy90 points

    yes , it happened occasionally, and work normal most time

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  • Andrew Elder
    Posted by Andrew Elder
    on Jun 07 2012 07:36 AM
    Intellectual710 points

    Can you post the code for you EDMA HWI ?

    Are you using a loop to check the IPR flags before you exit the HWI routine ?

    At what rate are the EDMA HWI occurring ?

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