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Trouble Shooting

Launch Fails

You have attempted to launch the tornado system, and an error occurs.

Not Authorized

Cause: This occurs when the rt-lab1 or rt-target system attempts to connect and fails.
Fix: Log out of everything, and enable access by using the xhost command: 
xhost rt-lab1 rt-target1
Then, continue as in the getting started section.

Red light on the DIO board

Cause: The VME crate has been power-cycled. The DIO comes up in fail mode until the correct data is sent to the control port.
Fix: Bring up WindShell, and use the direct memory access to write to the control port:
m 0xfbff0080
0003
.

System Hangs

You have executed a task on the target system, and the system stops responding.

Target Locked Up

Cause: There can be a number of causes, from infinite loops in the target code, to uninterruptable tasks executing.
Fix: The simplest fix is to reboot the target system. There are three possible ways to do this:
  • Type ^X in the serial Connection window.
  • Type ^X in the WindShell window.
  • Press the reset button on the MVME2604 Board.

    These will cause the MVME2604 to undergo a hardware reset, and the system will reload VxWorks over the net to bring up a clean starting image. This will remove any possible debugging information, so don't use it unless it is necessary. You will see various messages as the Tornado Environment on the Host re-synchronises with the VxWorks OS on the target.

    If you have encountered a problem which is not covered in this document, please send e-mail to the TA.
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    Author: Jim Gunderson
    Last updated: Aug 17, 1998