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<ol style="list-style-type: decimal;">
<li><p>Copy Like with the directory <code>simpleserial-base</code> which is found at <code>chipwhisperer\hardware\victims\firmware\</code> previous tutorial, you'll need to have a copy of the chipwhisperer release firmware you want to a new directory called <code>simpleserial-base-lab2</code>modify and be able to build for your platform. You must keep it The instructions are repeated in the same directorydrop down menus below, as it will reference other files within that directory for but if you're comfortable with the build processprevious example, feel free to skip them.</p><p>If Alternatively, if you 're not too attached to your code, you can just completed modify your firmware from [[Tutorial_B1_Building_a_SimpleSerial_ProjectTutorial B1 Building a SimpleSerial Project]], you can simply reuse that code (this builds upon it).</p></li> <h2> Building the Basic Example </h2>{{CollapsibleSection|intro = === Building for CWLite with XMEGA Target ===|content= Building for XMEGA}} {{CollapsibleSection|intro = === Building for CWLite with Arm Target ===|content= Building for Arm}} {{CollapsibleSection|intro = === Building for Other Targets ===|content= Building for Other Targets}}<h2> Modifying the Basic Example </h2> <li><p>At this point we want to modify the system to perform a number of operations. We won't actually use the input data. To do so, open the file <code>simpleserial-base.c</code> with a text editor such as Programmer's Notepad (which ships with WinAVR).</p></li>
<li><p>Find the following code block towards the end of the file, which may look different if you just completed [[Tutorial_B1_Building_a_SimpleSerial_Project]].</p>
<source lang="c">/**********************************
/* End user-specific code here. *
********************************/</source></li>
<li><p></p></li><li><p>Change the terminal to the directory with your source, and run the same <code>make</code> command you did in [[Tutorial_B1_Building_a_SimpleSerial_Project]] earlier to build the system. Remember you can press the up arrow on the keyboard to get recently typed commands in most OSes:</p>
<pre>make PLATFORM=CW303</pre>
<li>Following the instructions given in [[Tutorial_B1_Building_a_SimpleSerial_Project]], program the AVR, XMEGA, or STM32 (ARM) with your new code. Note you __do not__ need to close the programming window. If you will be doing frequent modifications to the source code, this can simplify your life since you only need to hit the '''Program''' button in AVRStudio to download new code.</li>
<li>Ensure the hardware is setup as in [[Tutorial_B1_Building_a_SimpleSerial_Project]]. If using the CW1002, ensure the SMA cable is also connected as described in the previous tutorial.</li></ol>
