This is release version 0.1.0 of N100 SDK.

[!NOTE] - Please use Nuclei N100 SDK with Nuclei Studio 2024.06, get it from https://nucleisys.com/download.php#tools - Nuclei N100 SDK is modified based on Nuclei SDK 0.5.0 release, and will not merge back to Nuclei SDK in the future. - This SDK is not compatible with Nuclei SDK for 200/300/600/900/1000 series, if you want SDK for these series, please switch to master or develop branch, see https://github.com/Nuclei-Software/nuclei-sdk/tree/master

• Application

  • Added baremetal/freertos/ucosii/rtthread examples.
  • Baremetal examples contains helloworld, demo_irqc, demo_timer, demo_extirq, lowpower cases to show cpu interrupt and timer usage.
  • Baremetal examples also contains benchmark examples such as coremark, dhrystone, whetstone which can demostrate the performance of Nuclei CPU.
  • RTOS examples contains different samples to show how to use FreeRTOS, UCOSII and RT-Thread on Nuclei N100.

• Build System

  • Support Nuclei 100 series RISC-V CPU Cores.
  • Support Nuclei RISC-V GCC toolchain, IAR Compiler and Terapines ZCC toolchain.

• NMSIS

  • NMSIS in N100 SDK is not compatible with standard NMSIS, this is modified to match Nuclei 100 series CPU.
  • Most of the APIs in this modified NMSIS are similar to standard NMSIS, but some APIs have been changed or added.
  • Please refer to the header files in NMSIS/Core/Include directory for more details.

• SoC

  • Only Nuclei Evaluation SoC for 100 series is supported by this SDK.
  • If you want to port to your own SoC, you modify based on this evalsoc implementation.
  • This SDK will also be generated by 100 series nuclei_gen tool, please take a look at the evalsoc.memory, openocd_evalsoc.cfg, cpufeature.h and cpufeature.mk, for IAR projects, you need to also check the linker script inside it.
  • Only sram and flashxip download modes are supported in this SDK, and the linker script is quite different to normal Nuclei SDK, please take care, especially the vector table and exception entry address are RTL configurable which means when your RTL configuration is different to our evalsoc, you need to modify the linker script to match your rtl configuration.
  • IAR support is also added in this SDK, and linker and startup/exception code are different from GCC, please take care when you port to your own SoC.

• RTOS

  • FreeRTOS/UCOSII/RT-Thread port for 100 series CPU are added in this SDK.
  • IAR compiler port and gcc/clang port are also supported by these RTOSes.

• IDE support

  • Nuclei Studio 2024.06 will support this Nuclei N100 SDK via NPK solution just like Nuclei SDK.
  • IAR Workbench support is also done in this SDK, please take a try with it in ideprojects/iar folder.

• Documentation

  • The documentation is modified based on Nuclei SDK.
  • We have go through the whole documentation and modified it to match Nuclei N100 SDK, maybe some of them are not perfect, please feel free to correct me if you find any mistakes.