# Changeset 38

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Timestamp:
Sep 3, 2010, 5:27:28 PM (10 years ago)
Message:

First draft Claudio's talk finished.

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1 edited

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

 r37 \end{frame} \begin{frame} \frametitle{Interrupts} \begin{itemize} \item There are three classes of events that can trigger an interrupt: timer overflow, reception and transmission of a serial character, and external events. \item By default, all interrupts are disabled.  They must be enabled by modifying the IE SFR. \item Interrupt handlers are assigned a fixed address, within the range 0003h--0023h. \item There is a fixed polling sequence for interrupts: with external and timing interrupts being polled before serial interrupts. \item If 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. \end{itemize} \end{frame} \begin{frame} \frametitle{Topics not covered} \begin{itemize} \item Timers, and using timers to set serial baud rates \item Serial port access and settings \end{itemize} \end{frame} \end{document}
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