UV_K5_playground

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src/messenger

AFSK messenger with T9 typing support

• download mod uv_k5_01_26_cold_messenger_encoded.bin
• to enable messenger view press flash light button
• use keyboard to type message
• press MENU to send message
• press EXIT to clear message
• if message is cleared use EXIT to exit messenger view
• There is no timeout for the button. If you want to type letters located on the same button in a row, use an asterisk (*) to confirm the selected character

src/spectrum

update
Spectrum scanner. It prints a spectrum graph. Zoom in well as resolution can be controled via keyboard.

• download mod uv_k5_01_26_spectrum_2MHz_encoded.bin
• to enable spectum view press flash light button
• hold up or down key to change center frequency
• press 8 / 2 for zoom in / zoom out
• press 1 / 7 to increase / decrease resolution (smaller resolution == faster update rate)
• press PTT or EXIT to disable spectrum view

src/rssi_sbar

sbar with calibrated S steps

• download mod uv_k5_01_26_rssi_sbar_encoded.bin
• flash with original quansheng update tool

src/rssi_printer

mod for printing rx signal level (RSSI) in numerical format, also includes small signal level chart.

uploading to radio

• download mod uv_k5_01_26_rssi_printer_encoded.bin
• upload it through original firmware update tool:
  Quancheng website

src/pong

this is useless

• download mod uv_k5_01_26_pong_game_encoded.bin

flash masking and memory layout

Chinese mcu DP32G030 has feature called flash masking, here is how it works:

libs/k5_uv_system (par_runner)

The idea is to run this firmware 'parallel' with the original Quencheng firmware. This can be achieved by relocating the original vector table to the end of the original firmware, and placing a new vector table at the beginning, with entities pointing to the par_runner functions that wrap the original firmware handlers.
Every interrupt is first processed by the par_runner handlers, which can perform some tasks, before invoking the original firmware handler

flash memory layout

When building the "par_runner" target automaticly "bootloader" target will be build building UV_K5_Playground target will result in following outputs:

• target.bin / .hex - right part of image, can be used to generate encrypted firmware compatible with orginal Quescheng update tool
• bootloader.bin - stripped bootloader from orginal firmware
• target_with_bootloader.bin - complete firmware image
• target_encoded.bin - encrypted binary that can be uploaded through quancheng upload tool

To change the original firmware that will be wrapped and placed into the original firmware section, replace ./original_fw/original_fw.bin or set the variable CMakeLists.txt set(ORGINAL_FW_BIN orginal_fw.bin) in ./orginal_fw/CMakeLists.txt and rebuild par_runner

build system installation

currently tested on windows, requred:

• arm-none-eabi-gcc
• python (i have newest version)
• cmake
• ninja
• open-ocd

All folders with executables of the above programs should be added to the PATH environment variable.

After cloning repo init submodules:
$ git submodule update --init --recursive
install dependencies needed by fw_pack.py
$ pip install pyserial

for debugging:

• vs code
  • Cortex-Debug plugin
  • CMake plugin

building

via terminal

$ mkdir build $ cd build $ cmake ../ -G Ninja
for all targets:
$ ninja
for specific target:
$ ninja target_name
current targets: pong, rssi_printer, rssi_sbar, messenger, most_useless_mod, spectrum
to build binary that can be uploaded by quancheng fw update tool use _encoded suffix for example:
$ ninja rssi_sbar_encoded

uploading via openocd

$ ninja rssi_sbar_flash

via VS Code

Select the specific build target in the bottom bar and press build.

uploading

Enter the 'Run & Debug' tab, select 'kwaczek DBG', and press run.

links

• currently firmare that is wrapped by par_runner comes from Tunas1337 mod k5_26_encrypted_18to1300MHz.bin UV-K5-Modded-Firmwares
• crypting/encrypting/modding py tools amnemonic repo

Warning

I'm not responsible for radios bricked by this trojan xD