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<title>CMSIS-Pack: Flash Programming Algorithms</title>
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<div id="projectname">CMSIS-Pack
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 <span id="projectnumber">Version 1.4.9</span>
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<div id="projectbrief">Delivery Mechanism for Software Packs</div>
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<div class="title">Flash Programming Algorithms </div> </div>
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<div class="contents">
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<div class="toc"><h3>Table of Contents</h3>
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<ul><li class="level1"><a href="#CreateFPA">Creating a new Algorithm</a></li>
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<li class="level1"><a href="#AddFPA">Adding an Algorithm to a Pack</a></li>
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</ul>
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<div class="textblock"><p><b>Flash Programming Algorithms</b> are a piece of software to erase or download applications to Flash devices. A <a class="el" href="createPack_DFP.html">Pack with Device Support</a> usually contains predefined Flash algorithms for programming the devices that are supported by the DFP. A template for creating new algorithms are available in the <b>ARM:CMSIS</b> Pack. The following section describes the process in more detail.</p>
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<h1><a class="anchor" id="CreateFPA"></a>
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Creating a new Algorithm</h1>
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<p>Flash programming algorithms are defined with functions to erase and program the Flash device. Special compiler and linker settings are required. Follow these steps to create and configure a new Flash programming algorithm:</p>
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<ol type="1">
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<li>Copy the content from the <b>ARM:CMSIS</b> Pack folder (usually C:\Keil\ARM\Pack\ARM\CMSIS\<em>version</em>\Device\_Template_Flash) to a new folder.</li>
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<li>Rename the project file <b>NewDevice.uvproj</b> to represent the new Flash ROM device name, for example <b>MyDevice.uvproj</b>.</li>
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<li>Open the project with uVision. From the toolbar, use the drop-down <b>Select Target</b> to define the processor architecture. <b>Cortex-M</b> fits for all Cortex-M0/M0+, M3, and M4 devices. The configuration assumes a little-endian microcontroller. In case of a big-endian microcontroller, select the correct processor core with <b>Project</b> - <b>Options for Target</b> - <b>Device</b>.</li>
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<li>Open the dialog <b>Project</b> - <b>Options for Target</b> - <b>Output</b> and change the content of the field <b>Name of Executable</b> to represent the device, for example <b>MyDevice</b>.</li>
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<li>Adapt the programming algorithms in the file <a class="el" href="flashAlgorithm.html#FlashPrg">FlashPrg</a>.</li>
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<li>Adapt the device parameters in the file <a class="el" href="flashAlgorithm.html#FlashDev">FlashDev</a>.</li>
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<li>Use <b>Project</b> - <b>Build Target</b> to generate the new Flash programming algorithm. The output file (for example <b>MyDevice.FLM</b>) has to be <a class="el" href="flashAlgorithm.html#AddFPA">added</a> to the <b>DFP</b>.</li>
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</ol>
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<dl class="section note"><dt>Note</dt><dd><ul>
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<li>Creating a Flash programming algorithm with <a href="http://www.keil.com/arm/selector.asp" class="el" target="_blank">MDK-Lite</a> is not supported.</li>
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<li>Flash programming algorithms use <b>Read-Only Position Independent</b> and <b>Read-Write Position Independent</b> program code. These options are set in the dialogs <b>Project</b> - <b>Options for Target</b> - <b>C/C++</b> and <b>Project</b> - <b>Options for Target</b> - <b>Asm</b>.</li>
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<li>The dialog <b>Project</b> - <b>Options for Target</b> - <b>Linker</b> defines the linker scatter file <b>Target.lin</b>. The error L6305 is disabled with <code>–diag_suppress</code> <code>L6305</code>.</li>
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<li>The <a class="el" href="algorithmFunc.html">Flash Algorithm Functions</a> section contains reference for all the available functions.</li>
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</ul>
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</dd></dl>
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<p><a class="anchor" id="FlashPrg"></a></p>
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<h2>FlashPrg.c </h2>
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<p>The file <b>FlashPrg.c</b> contains the mandatory Flash programming functions <a class="el" href="algorithmFunc.html#Init">Init</a>, <a class="el" href="algorithmFunc.html#UnInit">UnInit</a>, <a class="el" href="algorithmFunc.html#EraseSector">EraseSector</a>, and <a class="el" href="algorithmFunc.html#ProgramPage">ProgramPage</a>. Optionally, depending on the device features (or to speed-up execution), the functions <a class="el" href="algorithmFunc.html#EraseChip">EraseChip</a>, <a class="el" href="algorithmFunc.html#BlankCheck">BlankCheck</a>, and <a class="el" href="algorithmFunc.html#Verify">Verify</a> can be implemented.</p>
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<p><a class="anchor" id="FlashDev"></a></p>
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<h2>FlashDev.c </h2>
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<p>The file <b>FlashDev.c</b> contains parameter definitions for:</p>
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<ol type="1">
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<li>the Flash programming functions.</li>
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<li>the <b>FlashDevice</b> structure: <div class="fragment"><div class="line"><span class="keyword">struct </span>FlashDevice const FlashDevice = {</div>
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<div class="line">FLASH_DRV_VERS, <span class="comment">// Driver Version, do not modify!</span></div>
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<div class="line"><span class="stringliteral">"STM32Fxxx High-density Flash"</span>, <span class="comment">// Device Name (512kB/384kB/256kB)</span></div>
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<div class="line">ONCHIP, <span class="comment">// Device Type</span></div>
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<div class="line">0x08000000, <span class="comment">// Device Start Address</span></div>
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<div class="line">0x00080000, <span class="comment">// Device Size in Bytes (512kB)</span></div>
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<div class="line">1024, <span class="comment">// Programming Page Size</span></div>
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<div class="line">0, <span class="comment">// Reserved, must be 0</span></div>
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<div class="line">0xFF, <span class="comment">// Initial Content of Erased Memory</span></div>
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<div class="line">100, <span class="comment">// Program Page Timeout 100 mSec</span></div>
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<div class="line">500, <span class="comment">// Erase Sector Timeout 500 mSec</span></div>
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<div class="line"> </div>
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<div class="line"><span class="comment">// Specify Size and Address of Sectors</span></div>
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<div class="line">0x0800, 0x000000, <span class="comment">// Sector Size 2kB (256 Sectors)</span></div>
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<div class="line">SECTOR_END</div>
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<div class="line">};</div>
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</div><!-- fragment --></li>
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</ol>
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<dl class="section note"><dt>Note</dt><dd>The <b>Device Name</b> will usually be shown in tools to identify the Flash algorithm. Make sure that this is changed to the correct device name from the DFP.</dd></dl>
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<h2>Testing Algorithms </h2>
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<p>The _Template_Flash\Test-folder contains a project that shows how to test a new Flash programming algorithm on behalf of a STM32F10x device. Adapt the code to your needs.</p>
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<h1><a class="anchor" id="AddFPA"></a>
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Adding an Algorithm to a Pack</h1>
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<p>The generated <b>*.FLM</b> file needs to be added to the <a class="el" href="createPack_DFP.html">Pack with Device Support</a>, so that it is available to the tool user for programming his device. Usually, a directory <b>Flash</b> is created and the algorithm is saved in this directory.</p>
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<p>The algorithm is specified within the the <a class="el" href="pdsc_family_pg.html#element_family">/package/devices/family</a> level: </p>
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<div class="fragment"><div class="line"><family Dfamily=<span class="stringliteral">"STM32F4"</span> Dvendor=<span class="stringliteral">"STMicroelectronics:13"</span>></div>
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<div class="line"> ...</div>
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<div class="line"> <algorithm name=<span class="stringliteral">"Flash/STM32F2xx_512.flm"</span> start=0x08000000 size=0x10000 <span class="keywordflow">default</span>=<span class="stringliteral">"1"</span>/> <!-- valid <span class="keywordflow">for</span> all devices of the family --></div>
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<div class="line"> </div>
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<div class="line"> <subFamily DsubFamily=<span class="stringliteral">"STM32F405"</span>></div>
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<div class="line"> <algorithm name=<span class="stringliteral">"Flash/STM32F2xx_1024.flm"</span> start=0x08000000 size=0x20000 <span class="keywordflow">default</span>=<span class="stringliteral">"1"</span>/> <!-- valid <span class="keywordflow">for</span> all devices of a subFamily --></div>
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<div class="line"></div>
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<div class="line"> <device Dname=<span class="stringliteral">"STM32F405OE"</span>></div>
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<div class="line"> <algorithm name=<span class="stringliteral">"Flash/STM32F2xx_2048.flm"</span> start=0x08000000 size=0x40000 <span class="keywordflow">default</span>=<span class="stringliteral">"1"</span>/> <!-- <span class="keywordflow">finally</span>, <span class="keyword">this</span> is the <span class="keywordflow">default</span> <span class="keywordflow">for</span> the device --></div>
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<div class="line"> </device></div>
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<div class="line"> ...</div>
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<div class="line"></family></div>
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</div><!-- fragment --><p>The argument <em>start</em> specifies the base address for the Flash programming algorithm.</p>
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<p>The argument <em>size</em> specifies the size covered by the Flash programming algorithm. End address = start + size - 1.</p>
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<p>The argument <em>default</em> specifies whether a Flash programming algorithm is set as the default algorithm in a project (when <span class="XML-Token">true</span>). If <em>default</em> is not set or false, the Flash programming algorithm can be configured on a lower level. However, the Flash programming algorithm of a project can be changed manually at any time during development. </p>
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