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‎index.html‎

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<div class="row row-cols-1 row-cols-lg-3 g-4">
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<a href="/posts/2026/02-23-pyocd-0.43.0-released.html">
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<a href="/posts/2026/04-01-pyocd-0.44.0-released.html">
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<div class="card h-100">
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<h5 class="card-title">pyOCD 0.43.0 released</h5>
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<p class="card-text">Introducing SEGGER RTT and SystemView support in the `run` subcommand, with flexible channel configuration.</p>
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<h5 class="card-title">pyOCD 0.44.0 released</h5>
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<p class="card-text">Introducing default debug sequences and flash programming support via debug sequences</p>
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</div>
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<small class="">23 Feb 2026</small>
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<small class="">01 Apr 2026</small>
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</a>
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<a href="/posts/2025/12-16-pyocd-0.42.0-released.html">
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<a href="/posts/2026/02-23-pyocd-0.43.0-released.html">
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<div class="card h-100">
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<h5 class="card-title">pyOCD 0.42.0 released</h5>
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<p class="card-text">Introducing a new `run` subcommand capable of running targets until a time limit or EOT.</p>
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<h5 class="card-title">pyOCD 0.43.0 released</h5>
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<p class="card-text">Introducing SEGGER RTT and SystemView support in the `run` subcommand, with flexible channel configuration.</p>
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</div>
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<small class="">16 Dec 2025</small>
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<small class="">23 Feb 2026</small>
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</a>
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<a href="/posts/2025/10-24-pyocd-0.40.0-released.html">
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<a href="/posts/2025/12-16-pyocd-0.42.0-released.html">
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<h5 class="card-title">pyOCD 0.40.0 released</h5>
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<p class="card-text">Introducing support for multiple concurrent GDB client connections to the same GDB server.</p>
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<h5 class="card-title">pyOCD 0.42.0 released</h5>
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<p class="card-text">Introducing a new `run` subcommand capable of running targets until a time limit or EOT.</p>
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</div>
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<div class="card-footer">
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<small class="">24 Oct 2025</small>
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<small class="">16 Dec 2025</small>
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‎posts/2026/04-01-pyocd-0.44.0-released.html‎

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<!DOCTYPE html>
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<link rel="stylesheet" href="/assets/styles/main.css">
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<title>pyOCD 0.44.0 released &mdash; pyOCD</title>
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<main role="main" class="content-scroll p-3 p-md-4">
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<p>&larr; <a href="/posts/">View all posts</a></p>
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<h1><a href="/posts/2026/04-01-pyocd-0.44.0-released.html">pyOCD 0.44.0 released</a></h1>
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<div class="post-header">
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<p class="text-muted border-bottom">
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<strong>Apr 1, 2026</strong>
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<br/>Teo Mahnic
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</p>
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</div>
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<p>pyOCD v0.44.0 has been released and is available from PyPI. This version includes several improvements and bug fixes.
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The complete list of changes is provided below</p>
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<p>To upgrade pyOCD, just run <code class="highlighter-rouge">pip</code>:</p>
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<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>pip install --upgrade pyocd
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</code></pre></div></div>
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<p>This version introduces support for default debug sequences as defined in the <a href="https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/debug_description.html#default_sequences">Open-CMSIS-Pack specification</a>,
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improving consistency and standards alignment. It adds missing debug sequence support for flash programming and holding
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hardware reset. It also changes the flash programming strategy for programming multiple flash memories to a single
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erase-program sequence, spanning all targeted memory regions.</p>
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<p>The RTT support has also been updated with renamed channel mode <code class="highlighter-rouge">server</code> (previously <code class="highlighter-rouge">telnet</code>) and improved robustness,
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flexibility, and transfer speed. Another new feature is the SystemView Server mode for the <code class="highlighter-rouge">run</code> subcommand, which
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allows using SEGGER’s SystemView Recorder via IP (TCP/IP connection).</p>
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<p>Thanks again to all the contributors who helped make this release possible! ❤️</p>
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<p><a href="https://github.com/pyocd/pyOCD/releases/tag/v0.44.0">v0.44.0 on GitHub</a> <br />
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<a href="https://pypi.org/project/pyocd/0.44.0">v0.44.0 on PyPI</a></p>
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<hr />
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<h2 id="new-features">New Features</h2>
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<ul>
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<li>Debug sequences:
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<ul>
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<li>Use default debug sequences as defined in the <a href="https://open-cmsis-pack.github.io/Open-CMSIS-Pack-Spec/main/html/debug_description.html#autotoc_md2">Open-CMSIS-Pack specification</a></li>
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<li>Support debug sequences for hardware reset: <code class="highlighter-rouge">ResetHardwareAssert</code> and <code class="highlighter-rouge">ResetHardwareDeassert</code></li>
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<li>Support debug sequences for flash programming: <code class="highlighter-rouge">FlashInit</code>, <code class="highlighter-rouge">FlashUninit</code>, <code class="highlighter-rouge">FlashEraseChip</code>, <code class="highlighter-rouge">FlashEraseSector</code>, <code class="highlighter-rouge">FlashEraseDone</code>, <code class="highlighter-rouge">FlashProgramPage</code>, <code class="highlighter-rouge">FlashProgramDone</code>, and <code class="highlighter-rouge">DebugCodeMemRemap</code></li>
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</ul>
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</li>
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<li><code class="highlighter-rouge">run</code> subcommand:
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<ul>
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<li>Add SystemView Server mode to support SEGGER’s SystemView Recorder via IP (TCP/IP connection)</li>
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</ul>
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</li>
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</ul>
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<h2 id="improvements">Improvements</h2>
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<ul>
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<li>RTT:
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<ul>
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<li>Improve robustness and tolerate unexpected target halts</li>
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<li>More flexible configuration</li>
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<li>Increase transfer speed</li>
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<li>Improve log messages</li>
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</ul>
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</li>
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<li>SystemView:
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<ul>
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<li>Improve log messages</li>
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</ul>
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</li>
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</ul>
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<h2 id="changes">Changes</h2>
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<ul>
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<li>Flash programming:
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<ul>
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<li>Split flash programming into separate erase and program operations</li>
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</ul>
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</li>
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<li>RTT Configuration:
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<ul>
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<li>Rename channel mode <code class="highlighter-rouge">telnet</code> to <code class="highlighter-rouge">server</code></li>
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</ul>
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</li>
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</ul>
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<h2 id="fixes">Fixes</h2>
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<ul>
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<li>GDB Server:
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<ul>
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<li>Fix thread information on subsequent client connection</li>
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</ul>
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</li>
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<li>Debug sequences:
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<ul>
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<li>Support inline control flow statements (<code class="highlighter-rouge">if</code>, <code class="highlighter-rouge">while</code>)</li>
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<li>Fix predefined debug access variable contents for <code class="highlighter-rouge">__protocol</code> and <code class="highlighter-rouge">__connection</code></li>
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</ul>
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</li>
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<li>Cortex-M:
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<ul>
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<li>Restrict PACBTI and PMU extension detection to Armv8.1-M targets</li>
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</ul>
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</li>
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<li>CoreSight:
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<ul>
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<li>Restore CSW value after pre-discovery</li>
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</ul>
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</li>
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</ul>
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<h2 id="targets">Targets</h2>
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<ul>
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<li>Add nRF54LM20A target (@StarSphere-1024)</li>
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</ul>
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<p><strong>Full Changelog</strong>: https://github.com/pyocd/pyOCD/compare/v0.43.1…v0.44.0</p>
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Copyright &copy; 2021-2026 PyOCD Authors.
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</p>
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Site and docs are <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>.<br/>
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Project code is <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0</a>.
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<a href="https://github.com/pyocd/.github/blob/main/CODE_OF_CONDUCT.md">Code of Conduct</a>
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<a href="https://github.com/pyocd/">GitHub</a>
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<h5>Projects</h5>
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<ul class="list-unstyled">
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<a href="https://github.com/pyocd/pyOCD">pyOCD</a>
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<a href="https://github.com/pyocd/cmsis-pack-manager">cmsis-pack-manager</a>
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<a href="https://github.com/pyocd/FlashAlgo">FlashAlgo</a>
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<h5>Community</h5>
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<a href="https://github.com/pyocd/pyOCD/issues">Issues</a>
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‎posts/index.html‎

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<a href="/posts/2026/04-01-pyocd-0.44.0-released.html"><strong>01 Apr 2026</strong> pyOCD 0.44.0 released</a>
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<div><p>Introducing default debug sequences and flash programming support via debug sequences</p></div>
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</li>
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<a href="/posts/2026/02-23-pyocd-0.43.0-released.html"><strong>23 Feb 2026</strong> pyOCD 0.43.0 released</a>
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<div><p>Introducing SEGGER RTT and SystemView support in the `run` subcommand, with flexible channel configuration.</p></div>

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