You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
5.2 KiB
HTML
116 lines
5.2 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1988-2018 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation; with the
|
||
|
|
Invariant Sections being "Funding Free Software", the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
"GNU Free Documentation License".
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development. -->
|
||
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>MSP430 Variable Attributes (Using the GNU Compiler Collection (GCC))</title>
|
||
|
|
|
||
|
|
<meta name="description" content="MSP430 Variable Attributes (Using the GNU Compiler Collection (GCC))">
|
||
|
|
<meta name="keywords" content="MSP430 Variable Attributes (Using the GNU Compiler Collection (GCC))">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content="makeinfo">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
|
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Variable-Attributes.html#Variable-Attributes" rel="up" title="Variable Attributes">
|
||
|
|
<link href="Nvidia-PTX-Variable-Attributes.html#Nvidia-PTX-Variable-Attributes" rel="next" title="Nvidia PTX Variable Attributes">
|
||
|
|
<link href="Microsoft-Windows-Variable-Attributes.html#Microsoft-Windows-Variable-Attributes" rel="prev" title="Microsoft Windows Variable Attributes">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
div.smalllisp {margin-left: 3.2em}
|
||
|
|
kbd {font-style: oblique}
|
||
|
|
pre.display {font-family: inherit}
|
||
|
|
pre.format {font-family: inherit}
|
||
|
|
pre.menu-comment {font-family: serif}
|
||
|
|
pre.menu-preformatted {font-family: serif}
|
||
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smallexample {font-size: smaller}
|
||
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smalllisp {font-size: smaller}
|
||
|
|
span.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="MSP430-Variable-Attributes"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Nvidia-PTX-Variable-Attributes.html#Nvidia-PTX-Variable-Attributes" accesskey="n" rel="next">Nvidia PTX Variable Attributes</a>, Previous: <a href="Microsoft-Windows-Variable-Attributes.html#Microsoft-Windows-Variable-Attributes" accesskey="p" rel="prev">Microsoft Windows Variable Attributes</a>, Up: <a href="Variable-Attributes.html#Variable-Attributes" accesskey="u" rel="up">Variable Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="MSP430-Variable-Attributes-1"></a>
|
||
|
|
<h4 class="subsection">6.32.10 MSP430 Variable Attributes</h4>
|
||
|
|
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>noinit</code></dt>
|
||
|
|
<dd><a name="index-noinit-variable-attribute_002c-MSP430"></a>
|
||
|
|
<p>Any data with the <code>noinit</code> attribute will not be initialised by
|
||
|
|
the C runtime startup code, or the program loader. Not initialising
|
||
|
|
data in this way can reduce program startup times.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>persistent</code></dt>
|
||
|
|
<dd><a name="index-persistent-variable-attribute_002c-MSP430"></a>
|
||
|
|
<p>Any variable with the <code>persistent</code> attribute will not be
|
||
|
|
initialised by the C runtime startup code. Instead its value will be
|
||
|
|
set once, when the application is loaded, and then never initialised
|
||
|
|
again, even if the processor is reset or the program restarts.
|
||
|
|
Persistent data is intended to be placed into FLASH RAM, where its
|
||
|
|
value will be retained across resets. The linker script being used to
|
||
|
|
create the application should ensure that persistent data is correctly
|
||
|
|
placed.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>lower</code></dt>
|
||
|
|
<dt><code>upper</code></dt>
|
||
|
|
<dt><code>either</code></dt>
|
||
|
|
<dd><a name="index-lower-variable-attribute_002c-MSP430"></a>
|
||
|
|
<a name="index-upper-variable-attribute_002c-MSP430"></a>
|
||
|
|
<a name="index-either-variable-attribute_002c-MSP430"></a>
|
||
|
|
<p>These attributes are the same as the MSP430 function attributes of the
|
||
|
|
same name (see <a href="MSP430-Function-Attributes.html#MSP430-Function-Attributes">MSP430 Function Attributes</a>).
|
||
|
|
These attributes can be applied to both functions and variables.
|
||
|
|
</p></dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|