From: Frank Geurts (geurts_at_rice.edu)
Date: Tue Mar 18 2003 - 19:28:18 EST
John Mitchell wrote:
> Frank,
> Let me understand. I think you are saying that the BiRa is not
> initialized when a run is restarted.
hi john -- that is correct, the only action besides the obviuous
readouts (with implicit LAM clear F0) is explicit clearing of the input
register LAM after a time-out (F10).
> If that is the case, then I don't
> know that adding a BiRa initialization will do anything.
i agree.
>
> The critical question is what operation might be done in the RunCommand
> Loop or at Run Start that would change the state of the system. I am
> reluctant to think that it is clearing the TOFpDAQ busy or sending the
> TOFpDAQ reset since these are done at the end of each event processing.
>
i walked through the code again carefully checking how weird Bira
behaviour could frustrate daq. It simply can't: unless through some
time-out (which i never saw in the pedestal test runs) Bira LAMs are
always automatically cleared while reading out the input register.
Also, I double-checked the setting of BUSYs and RESETs ... there is no
way that the software sets the TOFpDAQ BUSY without a trigger from LAMG,
which we don't get at the point when the TCD and Bira go incommunicado.
-f.
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