Changeset 38


Ignore:
Timestamp:
Sep 3, 2010, 5:27:28 PM (9 years ago)
Author:
mulligan
Message:

First draft Claudio's talk finished.

File:
1 edited

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  • Deliverables/D4.1/Presentation/Paris-September-2010.tex

    r37 r38  
    174174\end{frame}
    175175
     176\begin{frame}
     177\frametitle{Interrupts}
     178\begin{itemize}
     179\item
     180There are three classes of events that can trigger an interrupt: timer overflow, reception and transmission of a serial character, and external events.
     181\item
     182By default, all interrupts are disabled.  They must be enabled by modifying the IE SFR.
     183\item
     184Interrupt handlers are assigned a fixed address, within the range 0003h--0023h.
     185\item
     186There is a fixed polling sequence for interrupts: with external and timing interrupts being polled before serial interrupts.
     187\item
     188If two interrupts occur at the same time, and both are assigned the same interrupt priority, then whichever has precedence in the polling sequence is handled first.
     189\end{itemize}
     190\end{frame}
     191
     192\begin{frame}
     193\frametitle{Topics not covered}
     194\begin{itemize}
     195\item
     196Timers, and using timers to set serial baud rates
     197\item
     198Serial port access and settings
     199\end{itemize}
     200\end{frame}
     201
    176202\end{document}
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