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575 lines
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<!DOCTYPE html>
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<html>
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<head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb# githubog: http://ogp.me/ns/fb/githubog#">
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<meta charset='utf-8'>
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<title>avr_demo/blog/simple_usart/main.c at master · tuupola/avr_demo · GitHub</title>
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<link data-pjax-transient rel='permalink' href='/tuupola/avr_demo/blob/93ac6d434f8ed33c1d98bdc70bb3f8dfece1e127/blog/simple_usart/main.c'>
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<meta property="og:title" content="avr_demo"/>
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<meta property="og:description" content="avr_demo - Atmel demo code. Does not use any Arduino libraries. I want to learn this the hard way (tm)."/>
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<meta name="description" content="avr_demo - Atmel demo code. Does not use any Arduino libraries. I want to learn this the hard way (tm)." />
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<link href="https://github.com/tuupola/avr_demo/commits/master.atom" rel="alternate" title="Recent Commits to avr_demo:master" type="application/atom+xml" />
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<body class="logged_out env-production linux vis-public page-blob">
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<div class="container clearfix">
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<a class="header-logo-wordmark" href="https://github.com/">
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<span class="mega-octicon octicon-logo-github"></span>
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</a>
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<div class="header-actions">
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<a class="button primary" href="/join">Sign up</a>
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<a class="button signin" href="/login?return_to=%2Ftuupola%2Favr_demo%2Fblob%2Fmaster%2Fblog%2Fsimple_usart%2Fmain.c">Sign in</a>
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<div class="command-bar js-command-bar in-repository">
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<ul class="top-nav">
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<li class="explore"><a href="/explore">Explore</a></li>
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<li class="features"><a href="/features">Features</a></li>
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<li class="enterprise"><a href="https://enterprise.github.com/">Enterprise</a></li>
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<li class="blog"><a href="/blog">Blog</a></li>
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</ul>
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<form accept-charset="UTF-8" action="/search" class="command-bar-form" id="top_search_form" method="get">
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<input type="text" data-hotkey=" s" name="q" id="js-command-bar-field" placeholder="Search or type a command" tabindex="1" autocapitalize="off"
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data-repo="tuupola/avr_demo"
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data-branch="master"
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data-sha="74470625850bce7c16349869721ce21bee4d5b01"
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>
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<input type="hidden" name="nwo" value="tuupola/avr_demo" />
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<div class="select-menu js-menu-container js-select-menu search-context-select-menu">
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<span class="minibutton select-menu-button js-menu-target">
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<span class="js-select-button">This repository</span>
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<div class="select-menu-modal-holder js-menu-content js-navigation-container">
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<div class="select-menu-modal">
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<div class="select-menu-item js-navigation-item js-this-repository-navigation-item selected">
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<span class="select-menu-item-icon octicon octicon-check"></span>
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<input type="radio" class="js-search-this-repository" name="search_target" value="repository" checked="checked" />
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<div class="select-menu-item-text js-select-button-text">This repository</div>
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</div> <!-- /.select-menu-item -->
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<span class="select-menu-item-icon octicon octicon-check"></span>
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<input type="radio" name="search_target" value="global" />
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<div class="select-menu-item-text js-select-button-text">All repositories</div>
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</div> <!-- /.select-menu-item -->
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</div>
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</div>
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<span class="octicon help tooltipped downwards" title="Show command bar help">
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<span class="octicon octicon-question"></span>
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</span>
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<input type="hidden" name="ref" value="cmdform">
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</form>
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</div>
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</div>
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<div class="site" itemscope itemtype="http://schema.org/WebPage">
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<div class="pagehead repohead instapaper_ignore readability-menu">
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<div class="container">
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<ul class="pagehead-actions">
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<li>
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<a href="/login?return_to=%2Ftuupola%2Favr_demo"
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class="minibutton with-count js-toggler-target star-button tooltipped upwards"
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title="You must be signed in to use this feature" rel="nofollow">
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<span class="octicon octicon-star"></span>Star
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</a>
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<a class="social-count js-social-count" href="/tuupola/avr_demo/stargazers">
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8
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</a>
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</li>
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<li>
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<a href="/login?return_to=%2Ftuupola%2Favr_demo"
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class="minibutton with-count js-toggler-target fork-button tooltipped upwards"
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title="You must be signed in to fork a repository" rel="nofollow">
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<span class="octicon octicon-git-branch"></span>Fork
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</a>
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<a href="/tuupola/avr_demo/network" class="social-count">
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8
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</a>
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</li>
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</ul>
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<h1 itemscope itemtype="http://data-vocabulary.org/Breadcrumb" class="entry-title public">
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<span class="repo-label"><span>public</span></span>
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<span class="mega-octicon octicon-repo"></span>
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<span class="author">
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<a href="/tuupola" class="url fn" itemprop="url" rel="author"><span itemprop="title">tuupola</span></a>
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</span>
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<span class="repohead-name-divider">/</span>
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<strong><a href="/tuupola/avr_demo" class="js-current-repository js-repo-home-link">avr_demo</a></strong>
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<span class="page-context-loader">
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<img alt="Octocat-spinner-32" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</span>
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</h1>
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</div><!-- /.container -->
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</div><!-- /.repohead -->
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<div class="container">
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<div class="repository-with-sidebar repo-container ">
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<div class="repository-sidebar">
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<div class="sunken-menu vertical-right repo-nav js-repo-nav js-repository-container-pjax js-octicon-loaders">
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<div class="sunken-menu-contents">
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<ul class="sunken-menu-group">
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<li class="tooltipped leftwards" title="Code">
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<a href="/tuupola/avr_demo" aria-label="Code" class="selected js-selected-navigation-item sunken-menu-item" data-gotokey="c" data-pjax="true" data-selected-links="repo_source repo_downloads repo_commits repo_tags repo_branches /tuupola/avr_demo">
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<span class="octicon octicon-code"></span> <span class="full-word">Code</span>
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
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<li class="tooltipped leftwards" title="Issues">
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<a href="/tuupola/avr_demo/issues" aria-label="Issues" class="js-selected-navigation-item sunken-menu-item js-disable-pjax" data-gotokey="i" data-selected-links="repo_issues /tuupola/avr_demo/issues">
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<span class="octicon octicon-issue-opened"></span> <span class="full-word">Issues</span>
|
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<span class='counter'>0</span>
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
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<li class="tooltipped leftwards" title="Pull Requests"><a href="/tuupola/avr_demo/pulls" aria-label="Pull Requests" class="js-selected-navigation-item sunken-menu-item js-disable-pjax" data-gotokey="p" data-selected-links="repo_pulls /tuupola/avr_demo/pulls">
|
||
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<span class="octicon octicon-git-pull-request"></span> <span class="full-word">Pull Requests</span>
|
||
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<span class='counter'>0</span>
|
||
|
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
|
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</ul>
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<div class="sunken-menu-separator"></div>
|
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<ul class="sunken-menu-group">
|
||
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<li class="tooltipped leftwards" title="Pulse">
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<a href="/tuupola/avr_demo/pulse" aria-label="Pulse" class="js-selected-navigation-item sunken-menu-item" data-pjax="true" data-selected-links="pulse /tuupola/avr_demo/pulse">
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<span class="octicon octicon-pulse"></span> <span class="full-word">Pulse</span>
|
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
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<li class="tooltipped leftwards" title="Graphs">
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<a href="/tuupola/avr_demo/graphs" aria-label="Graphs" class="js-selected-navigation-item sunken-menu-item" data-pjax="true" data-selected-links="repo_graphs repo_contributors /tuupola/avr_demo/graphs">
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<span class="octicon octicon-graph"></span> <span class="full-word">Graphs</span>
|
||
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
|
||
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|
||
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<li class="tooltipped leftwards" title="Network">
|
||
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<a href="/tuupola/avr_demo/network" aria-label="Network" class="js-selected-navigation-item sunken-menu-item js-disable-pjax" data-selected-links="repo_network /tuupola/avr_demo/network">
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||
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<span class="octicon octicon-git-branch"></span> <span class="full-word">Network</span>
|
||
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<img alt="Octocat-spinner-32" class="mini-loader" height="16" src="https://github.global.ssl.fastly.net/images/spinners/octocat-spinner-32.gif" width="16" />
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</a> </li>
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||
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</ul>
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</div>
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</div>
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<div class="only-with-full-nav">
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<div class="clone-url open"
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||
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data-protocol-type="http"
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||
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data-url="/users/set_protocol?protocol_selector=http&protocol_type=clone">
|
||
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<h3><strong>HTTPS</strong> clone URL</h3>
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||
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<div class="clone-url-box">
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||
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<input type="text" class="clone js-url-field"
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||
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value="https://github.com/tuupola/avr_demo.git" readonly="readonly">
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||
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<span class="js-zeroclipboard url-box-clippy minibutton zeroclipboard-button" data-clipboard-text="https://github.com/tuupola/avr_demo.git" data-copied-hint="copied!" title="copy to clipboard"><span class="octicon octicon-clippy"></span></span>
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||
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</div>
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||
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</div>
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||
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<div class="clone-url "
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||
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data-protocol-type="subversion"
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||
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data-url="/users/set_protocol?protocol_selector=subversion&protocol_type=clone">
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||
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<h3><strong>Subversion</strong> checkout URL</h3>
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||
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<div class="clone-url-box">
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||
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<input type="text" class="clone js-url-field"
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||
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value="https://github.com/tuupola/avr_demo" readonly="readonly">
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||
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<div class="highlight"><pre><div class='line' id='LC1'><span class="cm">/*</span></div><div class='line' id='LC2'><span class="cm"> * Demonstration on how to redirect stdio to UART. </span></div><div class='line' id='LC3'><span class="cm"> *</span></div><div class='line' id='LC4'><span class="cm"> * http://appelsiini.net/2011/simple-usart-with-avr-libc</span></div><div class='line' id='LC5'><span class="cm"> *</span></div><div class='line' id='LC6'><span class="cm"> * To compile and upload run: make clean; make; make program;</span></div><div class='line' id='LC7'><span class="cm"> * Connect to serial with: screen /dev/tty.usbserial-*</span></div><div class='line' id='LC8'><span class="cm"> *</span></div><div class='line' id='LC9'><span class="cm"> * Copyright 2011 Mika Tuupola</span></div><div class='line' id='LC10'><span class="cm"> *</span></div><div class='line' id='LC11'><span class="cm"> * Licensed under the MIT license:</span></div><div class='line' id='LC12'><span class="cm"> * http://www.opensource.org/licenses/mit-license.php</span></div><div class='line' id='LC13'><span class="cm"> *</span></div><div class='line' id='LC14'><span class="cm"> */</span></div><div class='line' id='LC15'> </div><div class='line' id='LC16'><span class="cp">#include <stdio.h></span></div><div class='line' id='LC17'><br/></div><div class='line' id='LC18'><span class="cp">#include "main.h"</span></div><div class='line' id='LC19'><span class="cp">#include "uart.h"</span></div><div class='line' id='LC20'><br/></div><div class='line' id='LC21'><span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> <span class="p">{</span> </div><div class='line' id='LC22'><br/></div><div class='line' id='LC23'> <span class="n">uart_init</span><span class="p">();</span></div><div class='line' id='LC24'> <span class="n">stdout</span> <span class="o">=</span> <span class="o">&</span><span class="n">uart_output</span><span class="p">;</span></div><div class='line' id='LC25'> <span class="n">stdin</span> <span class="o">=</span> <span class="o">&</span><span class="n">uart_input</span><span class="p">;</span></div><div class='line' id='LC26'> </div><div class='line' id='LC27'> <span class="kt">char</span> <span class="n">input</span><span class="p">;</span></div><div class='line' id='LC28'><br/></div><div class='line' id='LC29'> <span class="k">while</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span></div><div class='line' id='LC30'> <span class="n">puts</span><span class="p">(</span><span class="s">"Hello world!"</span><span class="p">);</span></div><div class='line' id='LC31'> <span class="n">input</span> <span class="o">=</span> <span class="n">getchar</span><span class="p">();</span></div><div class='line' id='LC32'> <span class="n">printf</span><span class="p">(</span><span class="s">"You wrote %c</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">input</span><span class="p">);</span> </div><div class='line' id='LC33'> <span class="p">}</span></div><div class='line' id='LC34'> </div><div class='line' id='LC35'> <span class="k">return</span> <span class="mi">0</span><span class="p">;</span></div><div class='line' id='LC36'><span class="p">}</span></div></pre></div>
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</ul>
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</div><!-- /.site-footer -->
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</div><!-- /.container -->
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<div class="fullscreen-overlay js-fullscreen-overlay" id="fullscreen_overlay">
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<div class="fullscreen-container js-fullscreen-container">
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||
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<div class="textarea-wrap">
|
||
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<textarea name="fullscreen-contents" id="fullscreen-contents" class="js-fullscreen-contents" placeholder="" data-suggester="fullscreen_suggester"></textarea>
|
||
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<div class="suggester-container">
|
||
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<div class="suggester fullscreen-suggester js-navigation-container" id="fullscreen_suggester"
|
||
|
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data-url="/tuupola/avr_demo/suggestions/commit">
|
||
|
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</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="fullscreen-sidebar">
|
||
|
|
<a href="#" class="exit-fullscreen js-exit-fullscreen tooltipped leftwards" title="Exit Zen Mode">
|
||
|
|
<span class="mega-octicon octicon-screen-normal"></span>
|
||
|
|
</a>
|
||
|
|
<a href="#" class="theme-switcher js-theme-switcher tooltipped leftwards"
|
||
|
|
title="Switch themes">
|
||
|
|
<span class="octicon octicon-color-mode"></span>
|
||
|
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</a>
|
||
|
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</div>
|
||
|
|
</div>
|
||
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|
|
||
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|
||
|
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|
||
|
|
<div id="ajax-error-message" class="flash flash-error">
|
||
|
|
<span class="octicon octicon-alert"></span>
|
||
|
|
<a href="#" class="octicon octicon-remove-close close ajax-error-dismiss"></a>
|
||
|
|
Something went wrong with that request. Please try again.
|
||
|
|
</div>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|
||
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