Files
uv-k5-ua1zbe-firmware/external/CMSIS_5/CMSIS/DAP/Firmware/Examples/MCU-LINK
ua1zbe a1206d6fd4 UA1ZBE Custom Firmware v1.0
Features:
- VFO mode with direct frequency input
- POCSAG decoder (512/1200 baud) with BCH(31,21) correction
- Full-screen Spectrum analyzer
- FM Radio receiver
- RSSI signal indicator overlay
- Custom boot splash (UA1ZBE / POCSAG pager / build date)

Architecture:
- app/mode.c — mode dispatcher (VFO/POCSAG/Spectrum/FM)
- app/boot_splash.c — 2-second boot splash
- app/pocsag/ — POCSAG decoder + BCH correction
- app/display_rssi.c — RSSI indicator
- main.c — entry point with custom init
- syscalls.c — bare-metal _sbrk stub

Build: arm-none-eabi-gcc -Os -flto -Wall -Werror -Wextra
Size: 57.9KB Flash / 3.6KB RAM

Controls:
- 0-9: Direct frequency input (VFO)
- SK2: POCSAG mode
- SK1: Spectrum analyzer
- 0: FM Radio
- EXIT: Return to VFO
- F/*: Toggle 512/1200 baud (in POCSAG)
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CMSIS-DAP v2 firmware for NXP MCU-LINK debug probe.

CMSIS-DAP v2 uses USB bulk endpoints for the communication with the host PC and is therefore faster. Optionally, support for streaming SWO trace is provided via an additional USB endpoint.

Instructions for programing CMSIS_DAP firmware on MCU-LINK:

  • download and install MCU-LINK_installer from https://www.nxp.com/design/microcontrollers-developer-resources/mcu-link-debug-probe:MCU-LINK
  • disconnect MCU-LINK from USB (J1), set "firmware update" jumper (J3), connect MCU-LINK to USB (J1)
  • open a Command Window
  • navigate to the MCU-LINK_installer installation (default C:\nxp\MCU-LINK_installer) and go to the scripts sub-directory
  • copy pre-built firmware hex file ..\CMSIS\DAP\Firmware\Examples\MCU-LINK\Objects\CMSIS_DAP.hex to scripts directory
  • run the command: programm_CMSIS.cmd CMSIS_DAP.hex
  • follow the instructions in command window