577a5d7f96
- Rename the project to FreeTRX (fork of OpenGD77). - New README.md documenting the fork and its upstream source (OpenGD77 R20260131 / OpenGD77_MDUV380_DM1701_20260130). - Preserve the original project README as README.OpenGD77.md. - Add LICENSE.md reproducing the inherited OpenGD77 license (modified BSD 3-Clause + non-commercial clause). The license is NOT GPL-compatible and cannot be relicensed; all original copyrights are retained. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
48 lines
2 KiB
Markdown
48 lines
2 KiB
Markdown
# FreeTRX
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**FreeTRX is a fork of the [OpenGD77](https://opengd77.org) firmware** for DMR
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transceivers built around the STM32F405VGT MCU, AT1846S RF chip and HR-C6000 DMR
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chipset — the **TYT MD-UV380 / Retevis RT-3S** and **Baofeng DM-1701 / Retevis
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RT-84**.
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It adds a number of UI and quality-of-life changes on top of OpenGD77 (segmented
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S-meter, 7-segment frequency font, screen dimming, an audio-mute function, menu
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icons, and more). See [`CHANGELOG.md`](CHANGELOG.md) for the full list.
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## Upstream source
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This fork is based on the official OpenGD77 source release **R20260131**
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(source snapshot `OpenGD77_MDUV380_DM1701_20260130`):
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<https://opengd77.eu/index.php?dir=MDUV380_DM1701_RT3S_RT84/R20260131/sources_and_tools/&file=OpenGD77_MDUV380_DM1701_20260130.zip>
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The original OpenGD77 project README is preserved in
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[`README.OpenGD77.md`](README.OpenGD77.md).
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## DMR / AMBE codec
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As with OpenGD77, the source does **not** contain the AMBE codec required for DMR
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audio. It is merged in from an official manufacturer firmware (V26.45) at flash
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time by the firmware loader. See [`TOOLS.md`](TOOLS.md).
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## Building, flashing & tools
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See [`TOOLS.md`](TOOLS.md) for building (Docker + Arm GNU Toolchain 14), flashing
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(`./flash.sh`), grabbing screenshots, and building language files.
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## License
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FreeTRX **inherits the OpenGD77 license** — a modified BSD 3-Clause license with
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an additional **non-commercial** clause. It is **not** an OSI-approved
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open-source license and is **not GPL-compatible**; commercial use is prohibited.
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The code cannot be relicensed. See [`LICENSE.md`](LICENSE.md).
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## Credits
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OpenGD77 was originally conceived by **Kai Ludwig, DG4KLU**, with further
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development led by **Roger Clark, VK3KYY** and assisted by **Daniel
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Caujolle-Bert, F1RMB**, Alex DL4LEX, Colin G4EML and many other contributors.
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All original copyrights are retained (see the source file headers and
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[`README.OpenGD77.md`](README.OpenGD77.md)).
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FreeTRX fork maintained by **Marcus, DK1DA**.
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