064ec37e9a
- Refactored site specific stuff into a site module - PSI specific stuff is now in the PSI directory. - The old version has been tagged with pre-ansto
71 lines
2.8 KiB
TeX
71 lines
2.8 KiB
TeX
\subsection{The FOCUS Averager}
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This is a special object for the instrument FOCUS and its Status display
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client. In the FOCUS status display the averaged data from a number of
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detectors is displayed. Thus there is already a reduced form of data. The
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actual raw data would be 150*1024*4 bytes of data and possibly more. Rather
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then transporting all this data to the status display client at regular
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intervalls it was choosen to implement this averaging process at the server
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and only send the reduced form to the status display client. Which is two
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arrays of floating point data 1024 items long. This little object implements this
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averager.
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As all SICS objects this object has a little data structure:
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\begin{verbatim}
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typedef struct __FocusAverager {
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pObjectDescriptor pDes;
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pHistMem pHist;
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} FocusAverager;
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\end{verbatim}
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The two fields are the standard object descriptor and a pointer to the
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histogram memory object holding the data.
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The interface is minimal: it consists just of the factory function for
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installing this object into SICS and the actual function doing the
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averaging in the interpreter.
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\begin{flushleft} \small
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\begin{minipage}{\linewidth} \label{scrap1}
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$\langle$faint {\footnotesize ?}$\rangle\equiv$
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\vspace{-1ex}
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\begin{list}{}{} \item
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\mbox{}\verb@@\\
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\mbox{}\verb@ int MakeFA(SConnection *pCon, SicsInterp *pSics, void *pData,@\\
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\mbox{}\verb@ int argc, char *argv[]);@\\
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\mbox{}\verb@@\\
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\mbox{}\verb@ int FocusAverageDo(SConnection *pCon, SicsInterp *pSics, void *pData,@\\
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\mbox{}\verb@ int argc, char *argv[]);@\\
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\mbox{}\verb@@\\
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\mbox{}\verb@@$\diamond$
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\end{list}
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\vspace{-1ex}
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\footnotesize\addtolength{\baselineskip}{-1ex}
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\begin{list}{}{\setlength{\itemsep}{-\parsep}\setlength{\itemindent}{-\leftmargin}}
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\item Macro referenced in scrap ?.
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\end{list}
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\end{minipage}\\[4ex]
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\end{flushleft}
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\begin{flushleft} \small
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\begin{minipage}{\linewidth} \label{scrap2}
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\verb@"faverage.h"@ {\footnotesize ? }$\equiv$
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\vspace{-1ex}
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\begin{list}{}{} \item
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\mbox{}\verb@@\\
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\mbox{}\verb@/*-----------------------------------------------------------------------@\\
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\mbox{}\verb@ F o c u s A v e r a g e@\\
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\mbox{}\verb@@\\
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\mbox{}\verb@ An averager for FOCUS data. See faverage.tex for more details.@\\
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\mbox{}\verb@@\\
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\mbox{}\verb@ Mark Koennecke, October 1998@\\
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\mbox{}\verb@@\\
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\mbox{}\verb@--------------------------------------------------------------------------*/@\\
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\mbox{}\verb@#ifndef FOCUSAVERAGE@\\
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\mbox{}\verb@#define FOCUSAVERAGE@\\
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\mbox{}\verb@@$\langle$faint {\footnotesize ?}$\rangle$\verb@@\\
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\mbox{}\verb@#endif@\\
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\mbox{}\verb@@$\diamond$
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\end{list}
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\vspace{-2ex}
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\end{minipage}\\[4ex]
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\end{flushleft}
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