This is release 0.2.4 of Nuclei SDK, which is still under development.


  • The formal release is not yet published, the code is still under development, the changelog is updated due to code changes.

  • Application

    • Upgrade the demo_dsp application to a more complicated one, and by default, DSP_ENABLE is changed from OFF to ON

  • SoC

    • Update openocd configuration file for Hummingbird FPGA evaluation board, If you want to use 2-wire mode of JTAG, please change ftdi_oscan1_mode off in openocd_hbird.cfg to ftdi_oscan1_mode on.

    • Add delay_1ms function in all supported SoC platforms

    • Fix bugs found in uart and gpio drivers in hbird SoC

    • Move srodata after sdata for ILM linker script

    • Change bool to BOOL to avoid cpp compiling error in gd32vf103

    • Fix adc_mode_config function in gd32vf103 SoC

  • Build System

    • Add GDB_PORT variable in build system, which is used to specify the gdb port of openocd and gdb when running run_openocd and run_gdb targets

    • Add Nuclei N/NX/UX 600 series core configurations into Makefile.core

    • Add -lstdc++ library for cpp application

    • Generate hex output for dasm target


This is release 0.2.3 of Nuclei SDK.

  • OS

  • Application

    • Add RT-Thread demo application.

    • Don’t use the get_cpu_freq function in application code, which currently is only for internal usage, and not all SoC implementations are required to provide this function.

    • Use SystemCoreClock to get the CPU frequency instead of using get_cpu_freq() in whetstone application.

    • Update UCOSII applications due to UCOSII version upgrade, and application development for UCOSII also required little changes, please refer to UCOSII

    • Fix time_in_secs function error in coremark, and cleanup coremark application.

  • Documentation

    • Add documentation about RT-Thread and its application development.

    • Update documentation about UCOSII and its application development.

    • Update coremark application documentation.

  • Build System

    • Add build system support for RT-Thread support.

    • Build system is updated due to UCOSII version upgrade, the OS/UCOSII/cfg folder no longer existed, so no need to include it.

  • SoC

    • Update SoC startup and linkscript files to support RT-Thread

  • Misc

    • Add SConscript file in Nuclei SDK root, this file is used by RT-Thread package.


This is release 0.2.2 of Nuclei SDK.

  • OS

    • Update UCOSII portable code

    • Now both FreeRTOS and UCOSII are using similar portable code, which both use SysTimer Interrupt and SysTimer Software Interrupt.

  • Documentation

    • Update documentation about RTOS


This is release 0.2.1 of Nuclei SDK.

  • Build System

    • Add extra linker options -u _isatty -u _write -u _sbrk -u _read -u _close -u _fstat -u _lseek in Makefile.conf to make sure if you pass extra -flto compile option, link phase will not fail

  • Documentation

    • Add documentation about how to optimize for code size in application development, using demo_eclic as example.

  • OS

    • Update FreeRTOS to version V10.3.1

    • Update FreeRTOS portable code


    • Update NMSIS to release v1.0.0-beta1


This is release 0.2.0-alpha of Nuclei SDK.

  • Documentation

    • Initial verison of Nuclei SDK documentation

    • Update Nuclei-SDK

  • Application

    • Add demo_eclic application

    • Add demo_dsp application

    • timer_test application renamed to demo_timer

  • Build System

    • Add comments for build System

    • Small bug fixes


    • Change NMSIS/Include to NMSIS/Core/Include

    • Add NMSIS/DSP and NMSIS/NN header files

    • Add NMSIS-DSP and NMSIS-NN pre-built libraries


This is release 0.1.1 of Nuclei SDK.

Here are the main features of this release:

  • Support Windows and Linux development in command line using Make

  • Support development using PlatformIO, see

  • Support Humming Bird FPGA evaluation Board and GD32VF103 boards

    • The Humming Bird FPGA evaluation Board is used to run evaluation FPGA bitstream of Nuclei N200, N300, N600 and NX600 processor cores

    • The GD32VF103 boards are running using a real MCU from Gigadevice which is using Nuclei N200 RISC-V processor core

  • Support different download modes flashxip, ilm, flash for our FPGA evaluation board