From: hadeshyp <hadeshyp>
Date: Tue, 27 Apr 2010 22:11:59 +0000 (+0000)
Subject: *** empty log message ***
X-Git-Url: https://jspc29.x-matter.uni-frankfurt.de/git/?a=commitdiff_plain;h=4e02e52715482103085728084086c57a15330cf7;p=daqdocu.git

*** empty log message ***
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diff --git a/commonfeatures.tex b/commonfeatures.tex
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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\subsection{Common Error and Status Bits}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+For each transmission there are 32 bits that give a rough overview of the status of the boards and transport error information. The meaning of the upper 16 bit depends on the channel while the lower 16 bit are the same on all channels. Their meaning is given in table \ref{commonerrorbits}. From these bits, only bit 4 can be set by the user, the rest is generated inside the network.
+
+
+\begin{table}
+\begin{center}
+\begin{tabularx}{\textwidth}{|c|c|C|}
+\hline
+\textbf{Bits} & \textbf{Name} & \textbf{Description} \\
+\hline\hline
+0 & endpoint reached &  At least one endpoint has been addressed by the transfer. If not set, no endpoint with the given address exists in the network. \\
+1 & collision detected & Used in the (theoretical) case that two active endpoints send data at the same time. The initial transfer this reply belongs to has been lost. \\
+2 & word missing & There was a mismatch between an internal packet counter and the length transported in an EOB packet.\\
+3 & checksum mismatch & There was a mismatch between an internally generated checksum and one received with a EOB or TRM packet. \\
+4 & don't understand & The addressed endpoint does not know how to treat the incoming data. \\
+5 & buffer mismatch & The numbers of sent EOB and received ACK do not match. \\
+6 & answer missing & An endpoint connected to a hub did not send an answer. \\
+7 - 15 & t.b.d & Bits not yet used. Reserved. \\
+\hline
+\end{tabularx}
+\caption{Common Error- and Status information contained in the network termination packet on all channels}
+\label{commonerrorbits}
+\end{center}
+\end{table}
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