blob: be5e946dfb4a58db8c4f1cadce01df9eae70ade8 (
plain)
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
|
<!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>Basic CMSIS Example</title>
<title>CMSIS-Core (Cortex-A): Basic CMSIS Example</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-Core (Cortex-A)
 <span id="projectnumber">Version 1.1.4</span>
</div>
<div id="projectbrief">CMSIS-Core support for Cortex-A processor-based devices</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('using_CMSIS.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">Basic CMSIS Example </div> </div>
</div><!--header-->
<div class="contents">
<div class="textblock"><p>A typical example for using the CMSIS layer is provided below. The example is based on an unspecific Cortex-A9 Device.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include <<a class="code" href="ARMCA9_8h.html">ARMCA9.h</a>></span> <span class="comment">// File name depends on device used</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keyword">const</span> uint32_t TICK_RATE_HZ = 1000U;</div>
<div class="line"> </div>
<div class="line">uint32_t <span class="keyword">volatile</span> msTicks; <span class="comment">// Counter for millisecond Interval</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">void</span> SysTick_Handler( <span class="keywordtype">void</span> )</div>
<div class="line">{</div>
<div class="line"> msTicks++; <span class="comment">// Increment Counter</span></div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">// We use the Private Tiemer (PTIM) of the Cortex-A9 FVP Model here.</span></div>
<div class="line"><span class="comment">// In general the available Timers are highly vendor specific for Cortex-A processors.</span></div>
<div class="line"><span class="keywordtype">void</span> private_timer_init(<span class="keywordtype">void</span>) {</div>
<div class="line"> </div>
<div class="line"> <a class="code" href="group__PTM__timer__functions.html#ga30516fed24977be8eecf3efd8b6a2fea">PTIM_SetLoadValue</a> ((<a class="code" href="group__system__init__gr.html#gaa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a>/TICK_RATE_HZ) - 1U);</div>
<div class="line"> <a class="code" href="group__PTM__timer__functions.html#gaabc1dba029389fe0e2a6297952df7972">PTIM_SetControl</a> (<a class="code" href="group__PTM__timer__functions.html#ga34f0ceea142a4be1479cb552bf8bc4d1">PTIM_GetControl</a>() | 7U);</div>
<div class="line"></div>
<div class="line"> <span class="comment">/* Install SysTick_Handler as the interrupt function for PTIM */</span></div>
<div class="line"> <a class="code" href="group__irq__ctrl__gr.html#gac1fcc16fb8e488d315cfa496f1d71db3">IRQ_SetHandler</a>((<a class="code" href="irq__ctrl_8h.html#ac62964c04a7fed2c84aeea9e34f415e2">IRQn_ID_t</a>)<a class="code" href="ARMCA9_8h.html#a7e1129cd8a196f4284d41db3e82ad5c8a116d3d8a9fcc5fef99becc9d25a56249">PrivTimer_IRQn</a>, SysTick_Handler);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Determine number of implemented priority bits */</span></div>
<div class="line"> <a class="code" href="group__irq__ctrl__gr.html#gaa90aed20ac94420fff4bbbf55c12d4c2">IRQ_SetPriority</a> ((<a class="code" href="irq__ctrl_8h.html#ac62964c04a7fed2c84aeea9e34f415e2">IRQn_ID_t</a>)<a class="code" href="ARMCA9_8h.html#a7e1129cd8a196f4284d41db3e82ad5c8a116d3d8a9fcc5fef99becc9d25a56249">PrivTimer_IRQn</a>, <a class="code" href="group__irq__priority__defs.html#gabaa4e91ab84dbe5f669080af6d0d81fa">IRQ_PRIORITY_Msk</a>);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Set lowest priority -1 */</span></div>
<div class="line"> <a class="code" href="group__irq__ctrl__gr.html#gaa90aed20ac94420fff4bbbf55c12d4c2">IRQ_SetPriority</a> ((<a class="code" href="irq__ctrl_8h.html#ac62964c04a7fed2c84aeea9e34f415e2">IRQn_ID_t</a>)<a class="code" href="ARMCA9_8h.html#a7e1129cd8a196f4284d41db3e82ad5c8a116d3d8a9fcc5fef99becc9d25a56249">PrivTimer_IRQn</a>, <a class="code" href="group__GIC__functions.html#ga397048004654f792649742f95bf8ae67">GIC_GetPriority</a>((<a class="code" href="irq__ctrl_8h.html#ac62964c04a7fed2c84aeea9e34f415e2">IRQn_ID_t</a>)PrivTimer_IRQn)-1);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Enable IRQ */</span></div>
<div class="line"> <a class="code" href="group__irq__ctrl__gr.html#ga4ad780a3dc23a1b6222de8adcd7c20a7">IRQ_Enable</a> ((<a class="code" href="irq__ctrl_8h.html#ac62964c04a7fed2c84aeea9e34f415e2">IRQn_ID_t</a>)PrivTimer_IRQn);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="comment">/* Delay execution for given amount of ticks */</span></div>
<div class="line"><span class="keywordtype">void</span> Delay(uint32_t ticks) {</div>
<div class="line"> uint32_t tgtTicks = msTicks + ticks; <span class="comment">// target tick count to delay execution to</span></div>
<div class="line"> <span class="keywordflow">while</span> (msTicks == tgtTicks) {</div>
<div class="line"> <a class="code" href="group__CMSIS__Core__InstructionInterface.html#gaac6cc7dd4325d9cb40d3290fa5244b3d">__WFE</a> (); <span class="comment">// Power-Down until next Event/Interrupt</span></div>
<div class="line"> }</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">/* main function */</span></div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> <span class="comment">/* Initialize device HAL here */</span></div>
<div class="line"> private_timer_init();</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">static</span> uint8_t ledState = 0;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">/* Infinite loop */</span></div>
<div class="line"> <span class="keywordflow">while</span> (1)</div>
<div class="line"> {</div>
<div class="line"> <span class="comment">/* Add application code here */</span></div>
<div class="line"> ledState = !ledState;</div>
<div class="line"> Delay(500);</div>
<div class="line"> }</div>
<div class="line">}</div>
</div><!-- fragment --><p>CMSIS-Pack provides the <b>#define CMSIS_header_file</b> in <a href="../../Pack/html/pdsc_components_pg.html#RTE_Components_h"><b>RTE_Components.h</b></a> which gives you access to the <b><em>device</em>.h</b> file of a project. This allows you to generate generic software components that use the device selected in a project.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#include "RTE_Components.h"</span> <span class="comment">// include information about project configuration</span></div>
<div class="line"><span class="preprocessor">#include CMSIS_device_header // include <device>.h file</span></div>
</div><!-- fragment --> </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="using_pg.html">Using CMSIS in Embedded Applications</a></li>
<li class="footer">Generated on Wed Jul 10 2019 15:20:27 for CMSIS-Core (Cortex-A) Version 1.1.4 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>
|
