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Readout |
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The Readout program is responsible for responding to master triggers and reading out the experiment's digitizers. Readout is a harness into which an experiment specific readout module is linked. The harness hides all communication between Readout and the data flow architecture, manages command I/O and data buffering. The experiment specific segment focuses on how to manage the hardware associated with specific apparatus.
This page describes:
- The commands supported by Readout
- How to obtain the experiment specific skeleton
- How to modify the experiment specific skeleton
- How to build the tailored Readout software
Readout Commands
Readout commands are not case sensitive. This may change in future releases so prefer lower case commands.
BEGIN
Starts a run.
END
Ends the current run.
PAUSE
Pauses a run. Once paused, a run can either be RESUMEd or ENDed.
SET
Sets one of the following:
FREQUENCY
The number of seconds between scaler readout operations. Defaults to 10 seconds.
SCALERS
The number of scalers to read.
RUN
The run number
TITLE
The title. The remainder of the line is the title string e.g.:
set title This is my great title.
SHOW
Displays on of several status/state displays:
FREQUENCY
Displays the scaler readout period.
SCALERS
Displays the number of scalers to read.
TITLE
Displays the current title.
ALL
Comprehensive display of run state etc.
Obtaining the Experiment Specific Skeleton
To obtain the Experiment specific Skeleton at the NSCL:
- Make a new directory (e.g. Readout): (mkdir Readout)
- Set the new directory to be your cwd (cd Readout)
- Copy the experiment specific files: (cp /usr/opt/daq/Readout/Skeleton/* .)
Building the tailored readout software
Once you have tailored your readout software, you must build a tailored version of the Readout Program. This is done as follows:
make
This will build an executable named: Readout which can then be run.