Radtel RT-890 Custom Firmware

This project is an effort to improve the firmware of the Radtel RT-890 in terms of features and radio performance.

It is based on DualTachyon's OEFW which is reversed from the original Radtel 1.34 firmware.
Thanks to him for making this possible!

Disclaimer

This firmware is a work in progress and could be unstable; it could alter your radio and its data.
Use at your own risk and remember to back up your SPI memory before installing any custom firmware. DO NOT SKIP THIS STEP.

Features

• All stock features: check user's manual
• RX frequency can be set from 10 to 1300 MHz (results may vary)
• SSB reception
• Light theme
• AM Fix (improvement in AM reception with strong signals, port of @OneOfEleven's excellent work on the Quansheng UV-K5)
• Sensitivty improvements in gain and squelch
• Full control over side key and main key shortcuts
• New configurable actions (FM Radio, Scanner, FLashlight)
• 0.01K step
• Displaying registers in single VFO mode
• Displaying dBM when receiving
• Reworked scanner
  • 8 Scan lists
  • Faster scanning
  • Resume mode: Time, Carrier, No
  • Change scan direction while scanning (up/down keys)
  • Force scan resume (up/down keys)
• Spectrum view with waterfall display
• Reworked main menu
• Ability to disable LED toggling when scanning
• And much more!

Usage and feature instructions

See the Wiki in this repository for detailed usage instructions.

Pre-built firmware

You can find pre-built firmwares in the Actions

Telegram group

If you want to discuss this project, you can join the Telegram group.

Original OEFW readme

Support

• If you like my work, you can support me through https://ko-fi.com/DualTachyon

Open reimplementation of the Radtel RT-890 v1.34 firmware

This repository is a preservation project of the Radtel RT-890 v1.34 firmware. It is dedicated to understanding how the radio works and help developers making their own customisations/fixes/etc. It is by no means fully understood or has all variables/functions properly named, as this is best effort only. As a result, this repository will not include any customisations or improvements over the original firmware.

Compiler

arm-none-eabi GCC version 10.3.1 is recommended, which is the current version on Ubuntu 22.04.03 LTS. Other versions may generate a flash file that is too big. You can get an appropriate version from: https://developer.arm.com/downloads/-/gnu-rm

Building

To build the firmware, you need to fetch the submodules and then run make:

git submodule update --init --recursive --depth=1
make

Flashing

• Use the firmware.bin file with either RT-890-Flasher or RT-890-Flasher-CLI

License

Copyright 2023 Dual Tachyon https://github.com/DualTachyon

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.