\hypertarget{gGEMW_8h}{
\section{g\-GEMW.h File Reference}
\label{gGEMW_8h}\index{gGEMW.h@{gGEMW.h}}
}
command/response methods for the GEM Window register block  


{\tt \#include \char`\"{}GDAB/gdab.h\char`\"{}}\par
\subsection*{Functions}
\begin{CompactItemize}
\item 
int \hyperlink{gGEMW_8h_a0}{g\-GEMWcmd} (\hyperlink{struct__gdab}{gdab\-Handle} gdab, unsigned short opcode)
\begin{CompactList}\small\item\em Sends a dataless command. \item\end{CompactList}\item 
int \hyperlink{gGEMW_8h_a1}{g\-GEMWload} (\hyperlink{struct__gdab}{gdab\-Handle} gdab, unsigned short reg\-Id, unsigned int value)
\begin{CompactList}\small\item\em Loads a register with value. \item\end{CompactList}\item 
int \hyperlink{gGEMW_8h_a2}{g\-GEMWread} (\hyperlink{struct__gdab}{gdab\-Handle} gdab, unsigned short reg\-Id, unsigned int $\ast$value)
\begin{CompactList}\small\item\em Reads a register returing value in {\em val\/}. \item\end{CompactList}\end{CompactItemize}


\subsection{Detailed Description}
command/response methods for the GEM Window register block 

\begin{Desc}
\item[Author:]James Swain - \href{mailto:jswain@slac.stanford.edu}{\tt jswain@slac.stanford.edu}\end{Desc}


\subsection{Function Documentation}
\hypertarget{gGEMW_8h_a0}{
\index{gGEMW.h@{g\-GEMW.h}!gGEMWcmd@{gGEMWcmd}}
\index{gGEMWcmd@{gGEMWcmd}!gGEMW.h@{g\-GEMW.h}}
\subsubsection[gGEMWcmd]{\setlength{\rightskip}{0pt plus 5cm}int g\-GEMWcmd (\hyperlink{struct__gdab}{gdab\-Handle} {\em gdab}, unsigned short {\em opcode})}}
\label{gGEMW_8h_a0}


Sends a dataless command. 

\begin{Desc}
\item[Parameters:]
\begin{description}
\item[{\em gdab}]gdab\-Handle containing the COM I/O (gnat) handle \item[{\em opcode}]opcode of command to send \end{description}
\end{Desc}
\begin{Desc}
\item[Returns:]G\_\-OK on success\end{Desc}
Sends the dataless command specified by {\em opcode\/} to the GEM. \hypertarget{gGEMW_8h_a1}{
\index{gGEMW.h@{g\-GEMW.h}!gGEMWload@{gGEMWload}}
\index{gGEMWload@{gGEMWload}!gGEMW.h@{g\-GEMW.h}}
\subsubsection[gGEMWload]{\setlength{\rightskip}{0pt plus 5cm}int g\-GEMWload (\hyperlink{struct__gdab}{gdab\-Handle} {\em gdab}, unsigned short {\em reg}, unsigned int {\em value})}}
\label{gGEMW_8h_a1}


Loads a register with value. 

\begin{Desc}
\item[Parameters:]
\begin{description}
\item[{\em gdab}]gdab\-Handle containing the COM I/O (gnat) handle \item[{\em reg}]register to load \item[{\em value}]32-bit value to load \end{description}
\end{Desc}
\begin{Desc}
\item[Returns:]G\_\-OK on success\end{Desc}
Loads the GEM Control register specified by {\em reg\/} with {\em value\/} \hypertarget{gGEMW_8h_a2}{
\index{gGEMW.h@{g\-GEMW.h}!gGEMWread@{gGEMWread}}
\index{gGEMWread@{gGEMWread}!gGEMW.h@{g\-GEMW.h}}
\subsubsection[gGEMWread]{\setlength{\rightskip}{0pt plus 5cm}int g\-GEMWread (\hyperlink{struct__gdab}{gdab\-Handle} {\em gdab}, unsigned short {\em reg}, unsigned int $\ast$ {\em val})}}
\label{gGEMW_8h_a2}


Reads a register returing value in {\em val\/}. 

\begin{Desc}
\item[Parameters:]
\begin{description}
\item[{\em gdab}]gdab\-Handle containing the COM I/O (gnat) handle. \item[{\em reg}]register to read \item[{\em val}]pointer to storage to hold the response of the read command \end{description}
\end{Desc}
\begin{Desc}
\item[Returns:]G\_\-OK on success\end{Desc}
Reads the GEM Control register specified by {\em reg\/}. {\em val\/} is filled on return.

The following error codes are returned when LATp errors occur:

\begin{itemize}
\item GERR\_\-LATP\_\-HEADER\_\-PARITY \item GERR\_\-LATP\_\-CELL\_\-PARITY \item GERR\_\-LATP\_\-TRUNCATE \end{itemize}