164 lines
11 KiB
HTML
164 lines
11 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
||
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
||
|
|
<title>RTX Implementation</title>
|
||
|
|
<title>CMSIS-RTOS: RTX Implementation</title>
|
||
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<link href="cmsis.css" rel="stylesheet" type="text/css" />
|
||
|
|
<script type="text/javascript" src="jquery.js"></script>
|
||
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
||
|
|
<script type="text/javascript" src="printComponentTabs.js"></script>
|
||
|
|
<link href="navtree.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="resize.js"></script>
|
||
|
|
<script type="text/javascript" src="navtree.js"></script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(initResizable);
|
||
|
|
$(window).load(resizeHeight);
|
||
|
|
</script>
|
||
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
||
|
|
<script type="text/javascript" src="search/search.js"></script>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(function() { searchBox.OnSelectItem(0); });
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
||
|
|
<div id="titlearea">
|
||
|
|
<table cellspacing="0" cellpadding="0">
|
||
|
|
<tbody>
|
||
|
|
<tr style="height: 46px;">
|
||
|
|
<td id="projectlogo"><img alt="Logo" src="CMSIS_Logo_Final.png"/></td>
|
||
|
|
<td style="padding-left: 0.5em;">
|
||
|
|
<div id="projectname">CMSIS-RTOS
|
||
|
|
 <span id="projectnumber">Version 1.03</span>
|
||
|
|
</div>
|
||
|
|
<div id="projectbrief">Real-Time Operating System: API and RTX Reference Implementation.</div>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
<!-- end header part -->
|
||
|
|
<div id="CMSISnav" class="tabs1">
|
||
|
|
<ul class="tablist">
|
||
|
|
<script type="text/javascript">
|
||
|
|
<!--
|
||
|
|
writeComponentTabs.call(this);
|
||
|
|
//-->
|
||
|
|
</script>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<!-- Generated by Doxygen 1.8.6 -->
|
||
|
|
<script type="text/javascript">
|
||
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search');
|
||
|
|
</script>
|
||
|
|
<div id="navrow1" class="tabs">
|
||
|
|
<ul class="tablist">
|
||
|
|
<li><a href="index.html"><span>Main Page</span></a></li>
|
||
|
|
<li class="current"><a href="pages.html"><span>Usage and Description</span></a></li>
|
||
|
|
<li><a href="modules.html"><span>Reference</span></a></li>
|
||
|
|
<li>
|
||
|
|
<div id="MSearchBox" class="MSearchBoxInactive">
|
||
|
|
<span class="left">
|
||
|
|
<img id="MSearchSelect" src="search/mag_sel.png"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
alt=""/>
|
||
|
|
<input type="text" id="MSearchField" value="Search" accesskey="S"
|
||
|
|
onfocus="searchBox.OnSearchFieldFocus(true)"
|
||
|
|
onblur="searchBox.OnSearchFieldFocus(false)"
|
||
|
|
onkeyup="searchBox.OnSearchFieldChange(event)"/>
|
||
|
|
</span><span class="right">
|
||
|
|
<a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
|
||
|
|
</span>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</div><!-- top -->
|
||
|
|
<div id="side-nav" class="ui-resizable side-nav-resizable">
|
||
|
|
<div id="nav-tree">
|
||
|
|
<div id="nav-tree-contents">
|
||
|
|
<div id="nav-sync" class="sync"></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="splitbar" style="-moz-user-select:none;"
|
||
|
|
class="ui-resizable-handle">
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<script type="text/javascript">
|
||
|
|
$(document).ready(function(){initNavTree('rtxImplementation.html','');});
|
||
|
|
</script>
|
||
|
|
<div id="doc-content">
|
||
|
|
<!-- window showing the filter options -->
|
||
|
|
<div id="MSearchSelectWindow"
|
||
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
||
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
||
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
||
|
|
<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>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerator</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Macros</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(9)"><span class="SelectionMark"> </span>Groups</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(10)"><span class="SelectionMark"> </span>Pages</a></div>
|
||
|
|
|
||
|
|
<!-- iframe showing the search results (closed by default) -->
|
||
|
|
<div id="MSearchResultsWindow">
|
||
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
||
|
|
name="MSearchResults" id="MSearchResults">
|
||
|
|
</iframe>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<div class="header">
|
||
|
|
<div class="headertitle">
|
||
|
|
<div class="title">RTX Implementation </div> </div>
|
||
|
|
</div><!--header-->
|
||
|
|
<div class="contents">
|
||
|
|
<div class="textblock"><p>This version of RTX implements the CMSIS-RTOS API, which is a generic RTOS interface for Cortex-M processor-based devices. The CMSIS-RTOS API provides a standardized interface for software components that require RTOS functionality. This RTX implementation gives therefore serious benefits to the users and the software industry.</p>
|
||
|
|
<ul>
|
||
|
|
<li>The unified feature set of the CMSIS-RTOS API simplifies sharing of software components and reduces learning efforts.</li>
|
||
|
|
<li>Middleware components that use the CMSIS-RTOS API are RTOS agnostic and CMSIS-RTOS compliant middleware is easier to adapt.</li>
|
||
|
|
<li>This RTX implementation is available under the BSD license and can be freely distributed with project templates.</li>
|
||
|
|
</ul>
|
||
|
|
<p>The CMSIS-RTOS RTX manages the resources of the microcontroller system and implements the concept of parallel threads that run concurrently. There are many advantages of using the CMSIS-RTOS RTX kernel.</p>
|
||
|
|
<p>Applications frequently require several concurrent activities. RTX can manage multiple concurrent activities at the time when they are needed. Each activity gets a separate thread which executes a specific task and this simplifies the overall program structure. The CMSIS-RTOS RTX system is scalable and additional threads can be added easily at a later time. Threads have a priority allowing faster execution of time-critical parts of an user application.</p>
|
||
|
|
<p>The CMSIS-RTOS RTX offers services needed in many real-time applications, for example, periodical activation of timer functions, memory management, and message exchange between threads with time limits.</p>
|
||
|
|
<div class="image">
|
||
|
|
<img src="RTX_Structure.png" alt="RTX_Structure.png"/>
|
||
|
|
<div class="caption">
|
||
|
|
CMSIS-RTOS RTX Structure</div></div>
|
||
|
|
<p> Compared to the classic Keil RTX version, the CMSIS-RTOS RTX library is extended with the CMSIS API interface module (source file rt_cmsis.c) which implements the function translation. The header file <a class="el" href="cmsis__os_8h.html">cmsis_os.h</a> provides the API to the CMSIS-RTOS RTX for the user application. Refer to <a class="el" href="using.html">Create an RTX Project</a> for more information.</p>
|
||
|
|
<p>CMSIS-RTOS RTX has several options that are configured with the <a class="el" href="dirstructfiles.html#RTX_Conf_CM">RTX_Conf_CM.c</a> file. Refer to <a class="el" href="configure.html">Configure RTX</a> for more information.</p>
|
||
|
|
<p>Attributes of the CMSIS-RTOS RTX implementation:</p>
|
||
|
|
<ul>
|
||
|
|
<li>Provides the complete functions specified for a CMSIS-RTOS with the exception of the function <a class="el" href="technicalData.html#osWait">osWait</a>.</li>
|
||
|
|
<li>Interrupt Service Routines (ISR) <a class="el" href="theory.html#isr_function_calls">may call some CMSIS-RTOS RTX functions</a>.</li>
|
||
|
|
<li>Configurations options for Thread Stack. Refer to <a class="el" href="threadConfig.html">Thread Configuration</a> for more information.</li>
|
||
|
|
<li>Fully deterministic context switching and deadlock avoidance. Refer to <a class="el" href="theory.html#PriorityInversion">Priority Inversion on Resource Sharing</a> for more information.</li>
|
||
|
|
<li>Optional Round-Robin Thread switching with configurable time-slices. Refer to <a class="el" href="threadConfig.html">Thread Configuration</a> for more information.</li>
|
||
|
|
</ul>
|
||
|
|
<p>The following sections provide further details:</p>
|
||
|
|
<ul>
|
||
|
|
<li><a class="el" href="theory.html">Theory of Operation</a> : provides general information about the operation of CMSIS-RTOS RTX.</li>
|
||
|
|
<li><a class="el" href="dirstructfiles.html">Directory Structure and File Overview</a> : explains the directories and files that are supplied as part of CMSIS-RTOS RTX.</li>
|
||
|
|
<li><a class="el" href="technicalData.html">Technical Data</a> : lists hardware requirements and limitations such as number of concurrent threads.</li>
|
||
|
|
<li><a class="el" href="misraCompliance.html">MISRA-C:2004 Compliance Exceptions</a> : describes the violations to the MISRA standard.</li>
|
||
|
|
<li><a class="el" href="using.html">Create an RTX Project</a> : Provides instructions for writing and debugging applications with CMSIS-RTOS RTX.</li>
|
||
|
|
<li><a class="el" href="configure.html">Configure RTX</a> : Describes configuration parameters of CMSIS-RTOS RTX.</li>
|
||
|
|
<li><a class="el" href="exampleRTX_Tutorial.html">RTX Tutorial</a> : Is an in-depth tutorial that can be used with any hardware to get a better understanding of the concepts and use cases of a real-time operating system.</li>
|
||
|
|
<li><a class="el" href="creating_RTX_LIB.html">Building the RTX Library</a> : Describes how to build your own CMSIS-RTOS RTX library. </li>
|
||
|
|
</ul>
|
||
|
|
</div></div><!-- contents -->
|
||
|
|
</div><!-- doc-content -->
|
||
|
|
<!-- start footer part -->
|
||
|
|
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
|
||
|
|
<ul>
|
||
|
|
<li class="navelem"><a class="el" href="index.html">index</a></li>
|
||
|
|
<li class="footer">Generated on Wed Feb 8 2017 10:21:02 for CMSIS-RTOS by ARM Ltd. All rights reserved.
|
||
|
|
<!--
|
||
|
|
<a href="http://www.doxygen.org/index.html">
|
||
|
|
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6
|
||
|
|
-->
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|