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watchdog

Discussion in 'Wiki' started by derekleffew, May 23, 2009.

  1. derekleffew

    derekleffew Resident Curmudgeon Senior Team Premium Member

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    1. Show Control. A process of communication between two pieces of equipment. One will ask the other "Are you okay?" If the respondee does not reply "I'm okay" within a set period of time, the asking device sends an error message or other alert signal up to and including stopping the show.

    Also known as a "heartbeat" detector.

    2. A watchdog timer is a hardware reset function that must be periodically disabled by a healthy software program. Thus, if the software is crashed, it does not execute the disable, and the watchdog timer hits the reset line and restarts the device.
     
    Last edited by a moderator: Feb 8, 2010

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