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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Procyon AVRlib: extint.h Source File</title><link href="dox.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.2 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related Pages</a></div><h1>extint.h</h1><a href="extint_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file extint.h \brief External-Interrupt function library. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'extint.h'</span>00005 <span class="comment">// Title : External-Interrupt function library</span>00006 <span class="comment">// Author : Pascal Stang - Copyright (C) 2002-2004</span>00007 <span class="comment">// Created : 5/10/2002</span>00008 <span class="comment">// Revised : 11/16/2004</span>00009 <span class="comment">// Version : 1.0</span>00010 <span class="comment">// Target MCU : Atmel AVR Series</span>00011 <span class="comment">// Editor Tabs : 4</span>00012 <span class="comment">//</span>00013 <span class="comment">// Notes: This library provides convenient standardized configuration and</span>00014 <span class="comment">// access to external interrupts. The library is designed to make</span>00015 <span class="comment">// it possible to write code that uses external interrupts without</span>00016 <span class="comment">// digging into the processor datasheets to find register names and</span>00017 <span class="comment">// bit-defines. The library also strives to allow code which uses</span>00018 <span class="comment">// external interrupts to more easily cross-compile between different</span>00019 <span class="comment">// microcontrollers.</span>00020 <span class="comment">//</span>00021 <span class="comment">// NOTE: Using this library has certain advantages, but also adds</span>00022 <span class="comment">// overhead and latency to interrupt servicing. If the smallest</span>00023 <span class="comment">// code size or fastest possible latency is needed, do NOT use this</span>00024 <span class="comment">// library; link your interrupts directly.</span>00025 <span class="comment">//</span>00026 <span class="comment">//*****************************************************************************</span>00027 00028 <span class="preprocessor">#ifndef EXTINT_H</span>00029 <span class="preprocessor"></span><span class="preprocessor">#define EXTINT_H</span>00030 <span class="preprocessor"></span>00031 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>00032 00033 <span class="comment">// constants/macros/typdefs</span>00034 00035 <span class="comment">// interrupt macros for attaching user functions to external interrupts</span>00036 <span class="comment">// use these with extintAttach( intNum, function )</span><a name="l00037"></a><a class="code" href="extint_8h.html#a0">00037</a> <span class="preprocessor">#define EXTINT0 0x00 </span><span class="comment">///< External Interrupt 0</span><a name="l00038"></a><a class="code" href="extint_8h.html#a1">00038</a> <span class="comment"></span>#define EXTINT1 0x01 <span class="comment">///< External Interrupt 1</span><a name="l00039"></a><a class="code" href="extint_8h.html#a2">00039</a> <span class="comment"></span>#define EXTINT2 0x02 <span class="comment">///< External Interrupt 2</span><a name="l00040"></a><a class="code" href="extint_8h.html#a3">00040</a> <span class="comment"></span>#define EXTINT3 0x03 <span class="comment">///< External Interrupt 3</span><a name="l00041"></a><a class="code" href="extint_8h.html#a4">00041</a> <span class="comment"></span>#define EXTINT4 0x04 <span class="comment">///< External Interrupt 4</span><a name="l00042"></a><a class="code" href="extint_8h.html#a5">00042</a> <span class="comment"></span>#define EXTINT5 0x05 <span class="comment">///< External Interrupt 5</span><a name="l00043"></a><a class="code" href="extint_8h.html#a6">00043</a> <span class="comment"></span>#define EXTINT6 0x06 <span class="comment">///< External Interrupt 6</span><a name="l00044"></a><a class="code" href="extint_8h.html#a7">00044</a> <span class="comment"></span>#define EXTINT7 0x07 <span class="comment">///< External Interrupt 7</span>00045 <span class="comment"></span><a name="l00046"></a><a class="code" href="extint_8h.html#a8">00046</a> <span class="preprocessor">#define EXTINT_LEVEL_LOW 0x00 </span><span class="comment">///< Trigger on low level</span><a name="l00047"></a><a class="code" href="extint_8h.html#a9">00047</a> <span class="comment"></span>#define EXTINT_EDGE_ANY 0x01 <span class="comment">///< Trigger on any edge</span><a name="l00048"></a><a class="code" href="extint_8h.html#a10">00048</a> <span class="comment"></span>#define EXTINT_EDGE_FALLING 0x02 <span class="comment">///< Trigger on falling edge</span><a name="l00049"></a><a class="code" href="extint_8h.html#a11">00049</a> <span class="comment"></span>#define EXTINT_EDGE_RISING 0x03 <span class="comment">///< Trigger on rising edge</span>00050 <span class="comment"></span>00051 <span class="comment">// type of interrupt handler to use</span>00052 <span class="comment">// *do not change unless you know what you're doing</span>00053 <span class="comment">// Value may be SIGNAL or INTERRUPT</span>00054 <span class="preprocessor">#ifndef EXTINT_INTERRUPT_HANDLER</span>00055 <span class="preprocessor"></span><span class="preprocessor">#define EXTINT_INTERRUPT_HANDLER SIGNAL</span>00056 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00057 <span class="preprocessor"></span>00058 <span class="comment">// processor-adaptive defines</span>00059 <span class="comment">// mainstream AVR processors generally have 1,2,3, or 8 external interrupts</span>00060 <span class="comment">// (if someone has a better idea of how to manage this, let me know)</span>00061 <span class="preprocessor">#ifdef SIG_INTERRUPT7</span>00062 <span class="preprocessor"></span><span class="preprocessor"> #define EXTINT_NUM_INTERRUPTS 8</span>00063 <span class="preprocessor"></span><span class="preprocessor">#else</span>00064 <span class="preprocessor"></span><span class="preprocessor">#ifdef SIG_INTERRUPT2</span>00065 <span class="preprocessor"></span><span class="preprocessor"> #define EXTINT_NUM_INTERRUPTS 3</span>00066 <span class="preprocessor"></span><span class="preprocessor">#else</span>00067 <span class="preprocessor"></span><span class="preprocessor">#ifdef SIG_INTERRUPT1</span>00068 <span class="preprocessor"></span><span class="preprocessor"> #define EXTINT_NUM_INTERRUPTS 2</span>00069 <span class="preprocessor"></span><span class="preprocessor">#else</span>00070 <span class="preprocessor"></span><span class="preprocessor"> #define EXTINT_NUM_INTERRUPTS 1</span>00071 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00072 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00073 <span class="preprocessor"></span><span class="preprocessor">#endif</span>00074 <span class="preprocessor"></span>00075 <span class="comment">// functions</span>00076 <span class="comment"></span>00077 <span class="comment">//! initializes extint library</span>00078 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="extint_8c.html#a2">extintInit</a>(<span class="keywordtype">void</span>);00079 <span class="comment"></span>00080 <span class="comment">//! Configure external interrupt trigger</span>00081 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="extint_8c.html#a3">extintConfigure</a>(u08 interruptNum, u08 configuration);00082 00083 <span class="comment">// extintAttach and extintDetach commands</span>00084 <span class="comment">// These functions allow the attachment (or detachment) of any user</span>00085 <span class="comment">// function to an external interrupt. "Attaching" one of your own</span>00086 <span class="comment">// functions to an interrupt means that it will be called whenever</span>00087 <span class="comment">// that interrupt is triggered. Example usage:</span>00088 <span class="comment">//</span>00089 <span class="comment">// extintAttach(EXTINT0, myInterruptHandler);</span>00090 <span class="comment">// extintDetach(EXTINT0);</span>00091 <span class="comment">//</span>00092 <span class="comment">// extintAttach causes the myInterruptHandler() to be attached, and therefore</span>00093 <span class="comment">// execute, whenever the corresponding interrupt occurs. extintDetach removes</span>00094 <span class="comment">// the association and executes no user function when the interrupt occurs.</span>00095 <span class="comment">// myInterruptFunction must be defined with no return value and no arguments:</span>00096 <span class="comment">//</span>00097 <span class="comment">// void myInterruptHandler(void) { ... }</span>00098 <span class="comment"></span>00099 <span class="comment">//! Attach a user function to an external interrupt</span>00100 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="extint_8c.html#a4">extintAttach</a>(u08 interruptNum, <span class="keywordtype">void</span> (*userHandler)(<span class="keywordtype">void</span>) );<span class="comment"></span>00101 <span class="comment">//! Detach a user function from an external interrupt</span>00102 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="extint_8c.html#a5">extintDetach</a>(u08 interruptNum);00103 00104 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Oct 24 16:03:54 2005 for Procyon AVRlib by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address></body></html>⌨️ 快捷键说明
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