| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="utf-8"> |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> |
| |
| |
| <!-- This is broken by doc revisioning. |
| --> |
| <link rel="shortcut icon" href="../../../../img/favicon.ico"> |
| |
| <title>Creating HAL - Apache Mynewt</title> |
| |
| <link href="../../../../css/bootstrap-3.0.3.min.css" rel="stylesheet"> |
| <link rel="stylesheet" href="../../../../css/highlight.css"> |
| <link href="../../../../css/base.css" rel="stylesheet"> |
| <link href="../../../../css/custom.css" rel="stylesheet"> |
| <link href="../../../../css/v2.css" rel="stylesheet"> |
| <link href="https://fonts.googleapis.com/css?family=Lato" rel="stylesheet"> |
| <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css"> |
| |
| <!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries --> |
| <!--[if lt IE 9]> |
| <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script> |
| <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script> |
| <![endif]--> |
| |
| |
| <script> |
| (function(i, s, o, g, r, a, m) { |
| i["GoogleAnalyticsObject"] = r; |
| (i[r] = |
| i[r] || |
| function() { |
| (i[r].q = i[r].q || []).push(arguments); |
| }), |
| (i[r].l = 1 * new Date()); |
| (a = s.createElement(o)), (m = s.getElementsByTagName(o)[0]); |
| a.async = 1; |
| a.src = g; |
| m.parentNode.insertBefore(a, m); |
| })(window, document, "script", "//www.google-analytics.com/analytics.js", "ga"); |
| |
| ga("create", "UA-72162311-1", "auto"); |
| ga("send", "pageview"); |
| </script> |
| |
| </head> |
| |
| |
| <body class="Creating HAL"> |
| |
| |
| <div class="container"> |
| <div class="row v2-main-banner"> |
| <a class="logo-cell" href="/"> |
| <img class="logo" src="/img/logo.png"> |
| </a> |
| <div class="tagline-cell"> |
| <h4 class="tagline">An OS to build, deploy and securely manage billions of devices</h4> |
| </div> |
| <div class="news-cell"> |
| <div class="well"> |
| <h4>Latest News:</h4> <a href="/download">Apache Mynewt 1.12.0, Apache NimBLE 1.7.0 </a> released (April 4, 2024) |
| </div> |
| </div> |
| </div> |
| </div> |
| |
| |
| |
| |
| |
| |
| |
| |
| <nav id="navbar" class="navbar navbar-inverse affix-top" data-spy="affix" data-offset-top="150" role="navigation"> |
| <div class="container"> |
| <!-- Collapsed navigation --> |
| <div class="navbar-header"> |
| <!-- Expander button --> |
| <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> |
| <span class="sr-only">Toggle navigation</span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| </button> |
| |
| </div> |
| |
| <!-- Expanded navigation --> |
| <div class="navbar-collapse collapse"> |
| <!-- Main navigation --> |
| <ul class="nav navbar-nav navbar-right"> |
| <li |
| class="" |
| > |
| <a href="/"><i class="fa fa-home" style="font-size: larger;"></i></a> |
| </li> |
| <li |
| class="important" |
| > |
| <a href="/quick-start/">Quick Start</a> |
| </li> |
| <li |
| class="" |
| > |
| <a href="/about/">About</a> |
| </li> |
| <li |
| class="" |
| > |
| <a href="/talks/">Talks</a> |
| </li> |
| <li |
| class="active" |
| > |
| <a href="/documentation/">Documentation</a> |
| </li> |
| <li |
| class="" |
| > |
| <a href="/download/">Download</a> |
| </li> |
| <li |
| class="" |
| > |
| <a href="/community/">Community</a> |
| </li> |
| <li |
| class="" |
| > |
| <a href="/events/">Events</a> |
| </li> |
| </ul> |
| |
| </div> |
| </div> |
| </nav> |
| |
| |
| |
| <div class="container"> |
| |
| <div class="row"> |
| <div class="col-md-3 v2-sidebar sidebar-container"><div id="docSidebar" class="hidden-print" role="complementary"> |
| <div class="top"> |
| <div role="search"> |
| <form id="rtd-search-form" class="wy-form" action="../../../../search.html" method="get"> |
| <div class="form-group"> |
| <input type="text" name="q" class="form-control" placeholder="Search documentation" /> |
| </div> |
| </form> |
| </div> |
| </div> |
| <ul class="toc-nav"> |
| <li class="doc-version"><select class="form-control" onchange="if (this.value) window.location.href=this.value"> |
| <option value="/latest"> |
| Version: master |
| </option> |
| <option value="/v1_12_0/" > |
| Version: 1.12.0 |
| </option> |
| <option value="/v1_11_0/" > |
| Version: 1.11.0 |
| </option> |
| <option value="/v1_10_0/" > |
| Version: 1.10.0 |
| </option> |
| <option value="/v1_9_0/" > |
| Version: 1.9.0 |
| </option> |
| <option value="/v1_8_0/" > |
| Version: 1.8.0 |
| </option> |
| <option value="/v1_7_0/" > |
| Version: 1.7.0 |
| </option> |
| <option value="/v1_6_0/" > |
| Version: 1.6.0 |
| </option> |
| <option value="/v1_5_0/" > |
| Version: 1.5.0 |
| </option> |
| <option value="/v1_4_0/" > |
| Version: 1.4.0 |
| </option> |
| <option value="/v1_3_0/os/introduction" > |
| Version: 1.3.0 |
| </option> |
| <option value="/v1_2_0/os/introduction" > |
| Version: 1.2.0 |
| </option> |
| <option value="/v1_1_0/os/introduction" > |
| Version: 1.1.0 |
| </option> |
| <option value="/v1_0_0/os/introduction" selected="selected" > |
| Version: 1.0.0 |
| </option> |
| <option value="/v0_9_0/os/introduction" > |
| Version: 0.9.0 |
| </option> |
| </select></li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../introduction/">Mynewt Documentation</a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../get_started/get_started/">Basic Setup</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| <li > |
| <a href="../../../get_started/vocabulary/">Concepts</a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../tutorials/tutorials/">Tutorials</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../os_user_guide/">OS User Guide</a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../core_os/mynewt_os/">OS Core</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../core_os/porting/port_os/">Porting to your Platform</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../console/console/">Console</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../shell/shell/">Shell</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../split/split/">Split Images</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../bootloader/bootloader/">Bootloader</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li><a href=" |
| |
| |
| ../../fs/fs/fs/ |
| |
| ">File System</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../hal/">Hardware Abstraction Layer</a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| <li><a href=" |
| ../hal_api/ |
| ">API</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| <li > |
| <a href="../hal_in_libraries/">Using HAL</a> |
| </li> |
| |
| |
| |
| |
| |
| <li class="active"> |
| <a href="./">Creating HAL</a> |
| </li> |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../drivers/driver/">Drivers</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../testutil/testutil/">Test Utilities</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../devmgmt/newtmgr/">Device Management with Newt Manager</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../imgmgr/imgmgr/">Image Manager</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| <li > |
| <a href="../../baselibc/">Baselibc library</a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../json/json/">JSON</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../fcb/fcb/">Flash Circular Buffer</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../stats/stats/">Stats</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../logs/logs/">Logs</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../sysinitconfig/sysinitconfig/">System Configuration And Initialization</a> |
| |
| |
| </li> |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li><a href=" |
| ../../../../network/ble/ble_intro/ |
| ">BLE User Guide</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../../newt/newt_intro/">Newt Tool Guide</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li ><a href="../../../../newtmgr/overview/">Newt Manager Guide</a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| <li > |
| <a href="../../../../known_issues/">Known Issues</a> |
| </li> |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| <li><a href=" |
| ../../../../faq/go_env/ |
| ">Appendix</a> |
| |
| |
| </li> |
| |
| |
| |
| </ul> |
| </div></div> |
| |
| <div class="col-md-9" role="main"> |
| <div class="doc-header"> |
| <div role="navigation" aria-label="breadcrumbs navigation"> |
| <ul class="wy-breadcrumbs"> |
| <li><a href="/documentation/">Docs</a></li> |
| |
| |
| |
| <li>» <a href="os/modules/hal/hal/">Hardware Abstraction Layer</a></li> |
| |
| |
| |
| <li>» <a href="os/os_user_guide/">OS User Guide</a></li> |
| |
| |
| |
| <li>» <a href="os/introduction/">Mynewt Documentation</a></li> |
| |
| |
| |
| <li>» Creating HAL</li> |
| |
| |
| |
| </ul> |
| </div> |
| </div> |
| |
| |
| |
| |
| |
| |
| <div class="alert alert-warning"> |
| <p> |
| Version 1.0.0 is not the most recent version of the Apache Mynewt |
| documentation. Click <a href="/latest">here</a> to read the latest |
| version. |
| </p> |
| </div> |
| |
| |
| |
| <h1 id="creating-new-hal-interfaces">Creating New HAL Interfaces</h1> |
| <h2 id="hal-api">HAL API</h2> |
| <p>A HAL always includes header file with function declarations |
| for the HAL functionality in <code>/hw/hal/include/hal</code>. |
| The first argument of all functions in the interface typically include the virtual |
| device_id of the device you are controlling. </p> |
| <p>For example, in <a href="https://github.com/apache/incubator-mynewt-core/blob/master/hw/hal/include/hal/hal_gpio.h"><code>hal_gpio.h</code></a> |
| the device enumeration is the first argument to most methods and called <code>pin</code>.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code> void hal_gpio_write(int pin, int val); |
| </code></pre></div> |
| |
| <p>The device_id (in this case called <code>pin</code>) is not a physical device |
| (actual hardware pin), but a virtual pin which is defined by the |
| implementation of the HAL (and documented in the implementation of the HAL).</p> |
| |
| <div class="row"> |
| |
| |
| |
| |
| <ul class="nav nav-pills" style="margin-bottom: 10px"> |
| <li> |
| |
| </li> |
| <li class="pull-right"> |
| |
| </li> |
| </ul> |
| </div> |
| <footer class="row"> |
| <div class="col-xs-12"> |
| |
| <p class="copyright">Apache Mynewt (incubating) is available under Apache License, version 2.0.</p> |
| |
| </div> |
| <div class="col-xs-12"> |
| <div class="logos"> |
| <a href="https://www.apache.org/"> |
| <img src="/img/asf_logo_wide_small.png" alt="Apache" title="Apache"> |
| </a> |
| <p> |
| Copyright © 2015-2021 The Apache Software Foundation.<br> |
| <small class="footnote"> |
| Apache Mynewt, Mynewt, Apache, the Apache feather logo, and the Apache Mynewt |
| project logo are either registered trademarks or trademarks of the Apache |
| Software Foundation in the United States and other countries. |
| </small> |
| </p> |
| <a href=""> |
| <img src="https://www.countit.com/images/add_to_slack.png" alt="Slack Icon" title="Join our Slack Community" /> |
| </a> |
| </div> |
| </div> |
| <a href="https://www.apache.org/licenses/"> |
| <button class="button-footer-asf"> |
| License |
| </button> |
| </a> |
| <a href="https://www.apache.org/foundation/sponsorship.html"> |
| <button class="button-footer-asf"> |
| Sponsorship |
| </button> |
| </a> |
| <a href="https://www.apache.org/foundation/thanks.html"> |
| <button class="button-footer-asf"> |
| Thanks |
| </button> |
| </a> |
| <a href="https://www.apache.org/security/"> |
| <button class="button-footer-asf"> |
| Security |
| </button> |
| </a> |
| <a href="https://apache.org/events/current-event"> |
| <button class="button-footer-asf"> |
| ASF Events |
| </button> |
| </a> |
| </footer> |
| </div> |
| </div> |
| |
| |
| </div> |
| |
| <script src="../../../../js/jquery-1.10.2.min.js"></script> |
| <script src="../../../../js/bootstrap-3.0.3.min.js"></script> |
| <script src="../../../../js/highlight.pack.js"></script> |
| <script src="../../../../js/base.js"></script> |
| <script src="../../../../js/custom.js"></script> |
| <script src="search/main.js"></script> |
| |
| </body> |
| </html> |
