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    User name R. Michaels

    Log entry time 10:31:39 on January10,2005

    Entry number 138833

    This entry is a followup to: 138540

    keyword=helicity scalers fixed

    Yes, I know SRC expt doesn't care about helicity, but it was annoying
    that the scaler data gated by helicity was totally crazy (it would
    jump by large numbers occassionally).

    First of all, I checked the hardware. Cabling looks ok. I looked at
    the control inputs (helicity, LNE, QRT, gate) -- all fine (timing ok
    too). So, it turned out to be a software problem.

    In the TS code on TS0 & TS1, a process is periodically flushing out
    the FIFO of the helicity scaler (note, the main normalization scaler,
    not gated by helicity, is separate and more primitive). If a run
    starts, then CODA is supposed to take over this flushing process.
    But because of a mistake, arising from the fact that we have a new
    trigger supervisor (on the floor), there were two processes flushing
    the FIFO, which led to problems. I fixed this by setting a flag.
    Looks ok now.