Files
@ 910a3533e103
Branch filter:
Location: therm/Libraries/CMSIS/Documentation/Core/html/system_c_pg.html - annotation
910a3533e103
14.5 KiB
text/html
Strip out random crap
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 | dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc dc0c251991cc | <!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>CMSIS-CORE: System Configuration Files system_<device>.c and system_<device>.h</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>
<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>
<link href="stylsheetf" rel="stylesheet" type="text/css" />
</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-CORE
 <span id="projectnumber">Version 3.20</span>
</div>
<div id="projectbrief">CMSIS-CORE support for Cortex-M processor-based devices</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<div id="CMSISnav" class="tabs1">
<ul class="tablist">
<li><a href="../../General/html/index.html"><span>CMSIS</span></a></li>
<li class="current"><a href="../../Core/html/index.html"><span>CORE</span></a></li>
<li><a href="../../DSP/html/index.html"><span>DSP</span></a></li>
<li><a href="../../RTOS/html/index.html"><span>RTOS API</span></a></li>
<li><a href="../../SVD/html/index.html"><span>SVD</span></a></li>
</ul>
</div>
<!-- Generated by Doxygen 1.8.3.1 -->
<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('system_c_pg.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>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>
<!-- 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">System Configuration Files system_<device>.c and system_<device>.h </div> </div>
</div><!--header-->
<div class="contents">
<div class="textblock"><p>The <a class="el" href="system_c_pg.html">System Configuration Files system_<device>.c and system_<device>.h</a> provides as a minimum the functions described under <a class="el" href="group__system__init__gr.html">System and Clock Configuration</a>. These functions are device specific and need adaptations. In addition, the file might have configuration settings for the device such as XTAL frequency or PLL prescaler settings.</p>
<p>For devices with external memory BUS the system_<device>.c also configures the BUS system.</p>
<p>The silicon vendor might expose other functions (i.e. for power configuration) in the system_<device>.c file. In case of additional features the function prototypes need to be added to the system_<device>.h header file.</p>
<h1><a class="anchor" id="system_Device_sec"></a>
system_Device.c Template File</h1>
<p>The <a class="el" href="system_c_pg.html#system_Device_sec">system_Device.c Template File</a> for the Cortex-M3 is shown below.</p>
<pre class="fragment">/**************************************************************************//**
* @file system_<Device>.c
* @brief CMSIS Cortex-M# Device Peripheral Access Layer Source File for
* Device <Device>
* @version V3.10
* @date 23. November 2012
*
* @note
*
******************************************************************************/
/* Copyright (c) 2012 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used
to endorse or promote products derived from this software without
specific prior written permission.
*
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*/
#include <stdint.h>
#include "<Device>.h"
/*----------------------------------------------------------------------------
DEFINES
*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
Define clocks
*----------------------------------------------------------------------------*/
/* ToDo: add here your necessary defines for device initialization
following is an example for different system frequencies */
#define __HSI ( 6000000UL)
#define __XTAL (12000000UL) /* Oscillator frequency */
#define __SYS_OSC_CLK ( ___HSI) /* Main oscillator frequency */
#define __SYSTEM_CLOCK (4*__XTAL)
/*----------------------------------------------------------------------------
Clock Variable definitions
*----------------------------------------------------------------------------*/
/* ToDo: initialize SystemCoreClock with the system core clock frequency value
achieved after system intitialization.
This means system core clock frequency after call to SystemInit() */
uint32_t SystemCoreClock = __SYSTEM_CLOCK; /*!< System Clock Frequency (Core Clock)*/
/*----------------------------------------------------------------------------
Clock functions
*----------------------------------------------------------------------------*/
void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */
{
/* ToDo: add code to calculate the system frequency based upon the current
register settings.
This function can be used to retrieve the system core clock frequeny
after user changed register sittings. */
SystemCoreClock = __SYSTEM_CLOCK;
}
/**
* Initialize the system
*
* @param none
* @return none
*
* @brief Setup the microcontroller system.
* Initialize the System.
*/
void SystemInit (void)
{
/* ToDo: add code to initialize the system
do not use global variables because this function is called before
reaching pre-main. RW section maybe overwritten afterwards. */
SystemCoreClock = __SYSTEM_CLOCK;
}
</pre><h1><a class="anchor" id="system_Device_h_sec"></a>
system_Device.h Template File</h1>
<p>The system_<device>.h header file contains prototypes to access the public functions in the system_<device>.c file. The <a class="el" href="system_c_pg.html#system_Device_h_sec">system_Device.h Template File</a> is shown below.</p>
<pre class="fragment">/**************************************************************************//**
* @file system_<Device>.h
* @brief CMSIS Cortex-M# Device Peripheral Access Layer Header File for
* Device <Device>
* @version V3.10
* @date 23. November 2012
*
* @note
*
******************************************************************************/
/* Copyright (c) 2012 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used
to endorse or promote products derived from this software without
specific prior written permission.
*
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------*/
#ifndef SYSTEM_<Device>_H /* ToDo: replace '<Device>' with your device name */
#define SYSTEM_<Device>_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
/**
* Initialize the system
*
* @param none
* @return none
*
* @brief Setup the microcontroller system.
* Initialize the System and update the SystemCoreClock variable.
*/
extern void SystemInit (void);
/**
* Update SystemCoreClock variable
*
* @param none
* @return none
*
* @brief Updates the SystemCoreClock with current core Clock
* retrieved from cpu registers.
*/
extern void SystemCoreClockUpdate (void);
#ifdef __cplusplus
}
#endif
#endif /* SYSTEM_<Device>_H */
</pre> </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="_templates_pg.html">Template Files</a></li>
<li class="footer">Generated on Mon Mar 18 2013 13:37:41 for CMSIS-CORE by ARM Ltd. All rights reserved.
<!--
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.3.1
-->
</li>
</ul>
</div>
</body>
</html>
|