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| <div class="section" id="porting-mynewt-to-a-new-cpu-architecture"> |
| <h1>Porting Mynewt to a new CPU Architecture<a class="headerlink" href="#porting-mynewt-to-a-new-cpu-architecture" title="Permalink to this headline">¶</a></h1> |
| <p>A new CPU architecture typically requires the following:</p> |
| <ul class="simple"> |
| <li><p>A new compiler</p></li> |
| <li><p>New architecture-specific code for the OS</p></li> |
| <li><p>Helper libraries to help others porting to the same architecture</p></li> |
| </ul> |
| <p>These are discussed below:</p> |
| <div class="section" id="create-a-new-compiler"> |
| <h2>Create A New Compiler<a class="headerlink" href="#create-a-new-compiler" title="Permalink to this headline">¶</a></h2> |
| <p>NOTE: Newt does not automatically install the compilers require to build all platforms. Its up to the user using their |
| local machines package manager to install the compilers. The step described here just registers the compiler with newt.</p> |
| <p>Create a new directory (named after the compiler you are adding). Copy the <code class="docutils literal notranslate"><span class="pre">pkg.yml</span></code> file from another compiler.</p> |
| <p>Edit the <code class="docutils literal notranslate"><span class="pre">pkg.yml</span></code> file and change the configuration attributes to match your compiler. Most are self-explanatory |
| paths to different compiler and linker tools. There are a few configuration attributes worth noting.</p> |
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| <col style="width: 33%" /> |
| <col style="width: 67%" /> |
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| <th class="head"><p><strong>Description</strong></p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>pkg.keywords</p></td> |
| <td><p>Specific keywords to help others search for this using newt</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>compiler.flags.default</p></td> |
| <td><p>default compiler flags for this architecture</p></td> |
| </tr> |
| <tr class="row-even"><td><p>compiler.flags.optimized</p></td> |
| <td><p>additional flags when the newt tool builds an optimized image</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>compiler.flags.debug</p></td> |
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| <div class="section" id="implement-architecture-specific-os-code"> |
| <h2>Implement Architecture-specific OS code<a class="headerlink" href="#implement-architecture-specific-os-code" title="Permalink to this headline">¶</a></h2> |
| <p>There are several architecture-specific code functions that are required when implementing a new architecture. You can |
| find examples in the <code class="docutils literal notranslate"><span class="pre">sim</span></code> architecture within Mynewt.</p> |
| <p>When porting to a new CPU architecture, use the existing architectures as samples when writing your implementation.</p> |
| <p>Please contact the Mynewt development list for help and advice portingto new MCU.</p> |
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