DEV Community: Pranav Senthilkumar The latest articles on DEV Community by Pranav Senthilkumar (@pranav-s79). https://dev.to/pranav-s79 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4026440%2F6430b21f-c666-4a29-9f9b-9f51a7e8b282.png DEV Community: Pranav Senthilkumar https://dev.to/pranav-s79 en I built Regdrift, a CLI and GitHub Action for detecting breaking CMSIS-SVD changes Pranav Senthilkumar Sun, 12 Jul 2026 21:21:02 +0000 https://dev.to/pranav-s79/i-built-regdrift-a-cli-and-github-action-for-detecting-breaking-cmsis-svd-changes-51j3 https://dev.to/pranav-s79/i-built-regdrift-a-cli-and-github-action-for-detecting-breaking-cmsis-svd-changes-51j3 <p>Hi guys, I've been working on Regdrift, my first open-source project. It's a CLI and GitHub Action that compares two CMSIS-SVD files to check whether there are any register-map changes that could affect firmware functionality.</p> <p>It catches changes such as moved registers, interrupt renumbering, access changes, and altered read/write behavior. It then classifies those changes as <code>BREAKING</code>, <code>WARNING</code>, or <code>SAFE</code> so the tool can act as a CI gate.</p> <p>I'm looking for feedback from people who maintain SVDs, HALs, PACs, SDKs, or firmware repositories. If possible, I'd like to test it against real old/new SVD pairs and learn where the classifications produce false positives, miss important changes, or are unclear.</p> <p>For people who work frequently with CMSIS-SVD files: which types of register-map changes are most detrimental to firmware or cause the most difficult code-related problems?</p> <h2> Resources </h2> <p>GitHub: <a href="https://github.com/Pranav-s79/regdrift" rel="noopener noreferrer">https://github.com/Pranav-s79/regdrift</a></p> <h2> Install </h2> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code>pip <span class="nb">install </span>regdrift </code></pre> </div> <h2> Usage </h2> <div class="highlight js-code-highlight"> <pre class="highlight shell"><code>regdrift check old.svd new.svd </code></pre> </div> showdev python devtool github