178 lines
11 KiB
HTML
178 lines
11 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<meta http-equiv="X-UA-Compatible" content="IE=9"/>
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<title>Basic CMSIS Example</title>
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<title>CMSIS-CORE: Basic CMSIS Example</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="cmsis.css" rel="stylesheet" type="text/css" />
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$(document).ready(function() { searchBox.OnSelectItem(0); });
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<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
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<div id="titlearea">
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<table cellspacing="0" cellpadding="0">
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<tbody>
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<tr style="height: 46px;">
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<td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td>
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<td style="padding-left: 0.5em;">
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<div id="projectname">CMSIS-CORE
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 <span id="projectnumber">Version 5.0.1</span>
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</div>
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<div id="projectbrief">CMSIS-CORE support for Cortex-M processor-based devices</div>
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</td>
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</tr>
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</tbody>
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<div id="navrow1" class="tabs">
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<ul class="tablist">
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<li><a href="index.html"><span>Main Page</span></a></li>
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<li class="current"><a href="pages.html"><span>Usage and Description</span></a></li>
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<li><a href="modules.html"><span>Reference</span></a></li>
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<li>
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</div><!-- top -->
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$(document).ready(function(){initNavTree('using_CMSIS.html','');});
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<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Data Structures</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Pages</a></div>
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<iframe src="javascript:void(0)" frameborder="0"
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name="MSearchResults" id="MSearchResults">
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</iframe>
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</div>
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<div class="header">
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<div class="headertitle">
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<div class="title">Basic CMSIS Example </div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><p>A typical example for using the CMSIS layer is provided below. The example is based on a STM32F10x Device.</p>
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<div class="fragment"><div class="line"><span class="preprocessor">#include <stm32f10x.h></span> <span class="comment">// File name depends on device used</span></div>
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<div class="line"> </div>
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<div class="line">uint32_t <span class="keyword">volatile</span> msTicks; <span class="comment">// Counter for millisecond Interval</span></div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> SysTick_Handler (<span class="keywordtype">void</span>) { <span class="comment">// SysTick Interrupt Handler</span></div>
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<div class="line"> msTicks++; <span class="comment">// Increment Counter</span></div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> WaitForTick (<span class="keywordtype">void</span>) {</div>
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<div class="line"> uint32_t curTicks;</div>
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<div class="line"> </div>
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<div class="line"> curTicks = msTicks; <span class="comment">// Save Current SysTick Value</span></div>
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<div class="line"> <span class="keywordflow">while</span> (msTicks == curTicks) { <span class="comment">// Wait for next SysTick Interrupt</span></div>
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<div class="line"> <a class="code" href="group__intrinsic__CPU__gr.html#gad3efec76c3bfa2b8528ded530386c563">__WFE</a> (); <span class="comment">// Power-Down until next Event/Interrupt</span></div>
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<div class="line"> }</div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> TIM1_UP_IRQHandler (<span class="keywordtype">void</span>) { <span class="comment">// Timer Interrupt Handler</span></div>
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<div class="line"> ; <span class="comment">// Add user code here</span></div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> timer1_init(<span class="keywordtype">int</span> frequency) { <span class="comment">// Set up Timer (device specific)</span></div>
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<div class="line"> <a class="code" href="group__NVIC__gr.html#ga5bb7f43ad92937c039dee3d36c3c2798">NVIC_SetPriority</a> (TIM1_UP_IRQn, 1); <span class="comment">// Set Timer priority</span></div>
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<div class="line"> <a class="code" href="group__NVIC__gr.html#ga530ad9fda2ed1c8b70e439ecfe80591f">NVIC_EnableIRQ</a> (TIM1_UP_IRQn); <span class="comment">// Enable Timer Interrupt</span></div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"> </div>
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<div class="line"><span class="keywordtype">void</span> Device_Initialization (<span class="keywordtype">void</span>) { <span class="comment">// Configure & Initialize MCU</span></div>
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<div class="line"> <span class="keywordflow">if</span> (<a class="code" href="group__SysTick__gr.html#gabe47de40e9b0ad465b752297a9d9f427">SysTick_Config</a> (<a class="code" href="group__system__init__gr.html#gaa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a> / 1000)) { <span class="comment">// SysTick 1mSec</span></div>
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<div class="line"> : <span class="comment">// Handle Error </span></div>
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<div class="line"> }</div>
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<div class="line"> timer1_init (); <span class="comment">// setup device-specific timer</span></div>
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<div class="line">}</div>
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<div class="line"> </div>
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<div class="line"> </div>
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<div class="line"><span class="comment">// The processor clock is initialized by CMSIS startup + system file</span></div>
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<div class="line"><span class="keywordtype">void</span> main (<span class="keywordtype">void</span>) { <span class="comment">// user application starts here</span></div>
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<div class="line"> Device_Initialization (); <span class="comment">// Configure & Initialize MCU</span></div>
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<div class="line"> <span class="keywordflow">while</span> (1) { <span class="comment">// Endless Loop (the Super-Loop)</span></div>
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<div class="line"> <a class="code" href="group__Core__Register__gr.html#gaeb8e5f7564a8ea23678fe3c987b04013">__disable_irq</a> (); <span class="comment">// Disable all interrupts</span></div>
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<div class="line"> Get_InputValues (); <span class="comment">// Read Values</span></div>
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<div class="line"> <a class="code" href="group__Core__Register__gr.html#ga0f98dfbd252b89d12564472dbeba9c27">__enable_irq</a> (); <span class="comment">// Enable all interrupts </span></div>
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<div class="line"> Calculation_Response (); <span class="comment">// Calculate Results</span></div>
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<div class="line"> Output_Response (); <span class="comment">// Output Results</span></div>
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<div class="line"> WaitForTick (); <span class="comment">// Synchronize to SysTick Timer</span></div>
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<div class="line"> }</div>
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<div class="line">}</div>
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</div><!-- fragment --> </div></div><!-- contents -->
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</div><!-- doc-content -->
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<!-- start footer part -->
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<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
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<ul>
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<li class="navelem"><a class="el" href="using_pg.html">Using CMSIS in Embedded Applications</a></li>
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<li class="footer">Generated on Wed Feb 8 2017 10:20:41 for CMSIS-CORE by ARM Ltd. All rights reserved.
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6
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