posts: add pyOCD v0.43.0 release notes (#4)

Author: TeoMahnic

_includes/footer.html

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   <div class="row row-cols-1 row-cols-sm-2 row-cols-md-4 pt-4">
     <div class="col-3">
       <p class="small">
-          Copyright &copy; 2021-2025 PyOCD Authors.
+          Copyright &copy; 2021-2026 PyOCD Authors.
       </p>
       <p class="small">
         Site and docs are <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>.<br/>

_posts/2026-02-23-pyocd-0.43.0-released.md

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+---
+title: "pyOCD 0.43.0 released"
+date: 2026-02-23
+categories:
+  - release
+tags:
+  - news
+  - release
+  - release-patch
+  - pyocd
+author: Teo Mahnic
+excerpt: "Introducing SEGGER RTT and SystemView support in the `run` subcommand, with flexible channel configuration."
+---
+
+pyOCD v0.43.0 has been released and is available from PyPI. This version includes several improvements and bug fixes.
+The complete list of changes is provided below
+
+To upgrade pyOCD, just run `pip`:
+
+```
+pip install --upgrade pyocd
+```
+
+A major enhancement in this version is the extension of the `run` subcommand to support SEGGER's [Real-Time Transfer (RTT)](https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/)
+and [SystemView](https://www.segger.com/products/development-tools/systemview/). RTT channels can now be configured
+individually through `*.cbuild-run.yml`, enabling flexible routing of target communication. Channels may operate as
+standard I/O bridges, forwarding target output to the console while relaying user input back to the device, or as
+Telnet endpoints, where a dedicated TCP server bridges a remote client directly to a selected RTT channel.
+For trace-oriented workflows, specific channels can be configured for SystemView capture, allowing trace data to be
+written to a file for post-run analysis.
+
+SystemView integration includes automatic handling of start and stop commands, streamlining trace capture without
+manual synchronization. The generated `*.SVDat` files can be opened directly in SEGGER’s SystemView tool,
+tool for inspection and analysis.
+
+Double buffering has been re-enabled for internal targets, with `STM32H7xx` devices excluded due to known issues.
+Internal flash algorithms have been unified around the `page_buffers` mechanism, and legacy template elements have
+been removed to simplify maintenance and ensure consistent behavior across targets.
+
+Improvements also include better log messages in GDB Server, when client disconnects from the server and non-blocking
+reading of the STDIO console.
+
+Thanks again to all the contributors who helped make this release possible! ❤️
+
+[v0.43.0 on GitHub](https://github.com/pyocd/pyOCD/releases/tag/v0.43.0) \
+[v0.43.0 on PyPI](https://pypi.org/project/pyocd/0.43.0)
+
+---
+
+## New Features
+- `run` subcommand:
+  - Add support for SEGGER's [RTT](https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/) and [SystemView](https://www.segger.com/products/development-tools/systemview/) (configured via `*.cbuild-run.yml`)
+  - Support per-channel RTT configuration with the following modes:
+    - Standard I/O: All data received from the target on this channel will be printed to the `sdtout`, and all user input from the `stdin` will be sent to the target
+    - Telnet: A Telnet server is started on the specified port, creating a bridge between the TCP connection and the corresponding RTT channel
+    - SystemView: Capture the trace data from the specified RTT channel and save it to a user-defined file
+  - SystemView integration:
+    - Support for automatic start and stop command handling
+    - Captured trace data (`*.SVDat` file) can be directly opened using SEGGER's SystemView analysis tool
+
+## Improvements
+- Flash programming:
+  - Re-enable double buffering mechanism for internal targets, except STM32H7xx (known to have issues)
+  - Migrate all internal target support to use `page_buffers` instead of `begin_data` in flash algorithms
+  - Remove `begin_data` from the algorithm template
+- GDB Server:
+  - Improve log message when client gets disconnected from the server
+- Standard I/O:
+  - Enable non-blocking read of the STDIO console
+- CMSIS-DAP v2:
+  - Send ZLP instead of a dummy byte to terminate OUT transfer
+- CoreSight:
+  - Always unlock ITM (do not check SLI and SLK bits in LSR register)
+  >[Cortex-M7 (AT610) and Cortex-M7 with FPU (AT611) Software Developer Errata Notice](https://developer.arm.com/documentation/SDEN1068427/0110/?lang=en)  
+    513195: Lock Status Indication incorrectly reads as one
+
+## Fixes
+- Flash programming:
+  - Fix LPC4088 flash algorithm `page_size`
+- CMSIS-Packs:
+  - Fix raised exception on `filename` property access when using extracted packs (@timll-mchp)
+- RTT:
+  - Fix retrieval of available/free bytes for up/down channels
+  - Fix `control-block` not found when the first character of the `control-block ID` was not present in the read memory (@HaoYDai)
+
+## Other
+- CI: add nightly workflow that builds PyInstaller artifacts from the `develop` branch
+
+## New Contributors
+* @MiloradCvjetkovic made their first contribution in https://github.com/pyocd/pyOCD/pull/1882
+* @timll-mchp made their first contribution in https://github.com/pyocd/pyOCD/pull/1901
+* @HaoYDai made their first contribution in https://github.com/pyocd/pyOCD/pull/1730
+
+**Full Changelog**: https://github.com/pyocd/pyOCD/compare/v0.42.0...v0.43.0