Checking latchup

This is old procedure for checking latchup circuitry it should not be used during normal run. The latchup control task runs on trigvme crate. It sets latchup, sleeps for 5 seconds, resets latchup, sleeps for 5 minutes and repeats the cycle again. To check if it is running, enter 'i' command in trigVME_ROC window:
    i
In the one of the last lines you should see 'latchup' in the column ENTRY. Check the DELAY column, it shows how many ticks (60 ticks is 1 sec) left for next latchup setting. The indication of the latchup event are:

1. in the fatalysis window - first 300 channels of Silicon will be flat.
2. on SILICON SLOW MONITORING computer - one of the green buttons in 'N RING' goes red for 2-3 seconds.

If there is no entry 'latchup' in the trigVME_ROC window then you need to restart latchup task:

    ld</export/home/phobos/PhatDAQ/roc/src/latchup.o
    sp latchup,60*60*5

Additional indication about status of the latchup task is two lights on the AVME 941X board in thrigvme crate.

• Red is on, Green is off - the task was not started
• Green is on, Red is off - the task sleeps for 5 minutes after resetting the latchup
• Green is off, Red is off - latchup was set for 5 sec.

Commands, you can use to check latchup:

• latchup_set();
• latchup_reset();
• latchup_stop(); /*this will stop latchup task*/