Nuclei Microcontroller Software Interface Standard V1.0.1

This is the offical V1.0.1 release of Nuclei MCU Software Interface Standard(NMSIS).

• NMSIS-Core

  • Add RISC-V DSP 64bit intrinsic functions in core_feature_dsp.h
  • Add more CSR definitions in riscv_encoding.h
  • Update arm compatiable functions for RISC-V dsp instruction cases in core_compatiable.h

• NMSIS-DSP

  • Optimize RISC-V 32bit DSP library implementation
  • Add support for Nuclei RISC-V 64bit DSP SIMD instruction for DSP library
  • Add test cases used for DSP library testing, mainly for internal usage
  • Change the examples and tests to use Nuclei SDK as running environment

• NMSIS-NN

  • Add support for Nuclei RISC-V 64bit DSP SIMD instruction for NN library
  • Change the examples and tests to use Nuclei SDK as running environment

• Device Templates

  • Add DDR DOWNLOAD_MODE in device templates

  • Modifications to startup_<Device>.S files

    • _premain_init is added to replace _init
    • _postmain_fini is added to replace _fini

  • If you have implemented your init or de-init functions through _init or _fini,
    please use _premain_init and _postmain_fini functions defined system_<Device>.c now

  • Cache control updates in System_.c

    • I-Cache will be enabled if __ICACHE_PRESENT = 1 defined in <Device>.h
    • D-Cache will be enabled if __DCACHE_PRESENT = 1 defined in <Device>.h

Nuclei Microcontroller Software Interface Standard V1.0.1-RC1

This is release candidate version V1.0.1-RC1 of NMSIS.

• NMSIS-Core

  • Add RISC-V DSP 64bit intrinsic functions in core_feature_dsp.h
  • Add more CSR definitions in riscv_encoding.h
  • Update arm compatiable functions for RISC-V dsp instruction cases in core_compatiable.h

• NMSIS-DSP

  • Optimize RISC-V 32bit DSP library implementation
  • Add support for Nuclei RISC-V 64bit DSP SIMD instruction for DSP library
  • Add test cases used for DSP library testing, mainly for internal usage
  • Change the examples and tests to use Nuclei SDK as running environment

• NMSIS-NN

  • Add support for Nuclei RISC-V 64bit DSP SIMD instruction for NN library
  • Change the examples and tests to use Nuclei SDK as running environment

• Device Templates

  • Add DDR DOWNLOAD_MODE in device templates
  • Modifications to ``startup_.S** files
    • _premain_init is added to replace _init
    • _postmain_fini is added to replace _fini
    • I/D Cache will be enabled by default now if present
  • If you have implemented your functions in _init or _fini,
    please place the changes in functions defined system_<Device>.c

Nuclei Microcontroller Software Interface Standard V1.0.0-beta1

Main changes in release V1.0.0-beta1.

• NMSIS-Core

  • Fix SysTick_Reload implementation
  • Update ECLIC_Register_IRQ implementation to allow handler == NULL
  • Fix MTH offset from 0x8 to 0xB, this will affect function of ECLIC_GetMth and ECLIC_SetMth
  • Fix wrong macro check in cache function
  • Add missing SOC_INT_MAX enum definition in Device template
  • In System_<Device>.c, ECLIC NLBits set to __ECLIC_INTCTLBITS,
    which means all the bits are for level, no bits for priority

Nuclei Microcontroller Software Interface Standard V1.0.0-beta

Main changes in release V1.0.0-beta.

• NMSIS-Core

  • Fix error typedef of CSR_MCAUSE_Type
  • Change CSR_MCACHE_CTL_DE to future value 0x00010000
  • Fix names in CSR naming, CSR_SCRATCHCSW -> CSR_MSCRATCHCSW,
    and CSR_SCRATCHCSWL -> CSR_MSCRATCHCSWL
  • Add macros in riscv_encoding.h: MSTATUS_FS_INITIAL, MSTATUS_FS_CLEAN, MSTATUS_FS_DIRTY

• Documentation

  • Fix an typo in core_template_intexc.rst
  • Add cross references of Nuclei ISA Spec
  • Update appendix
  • Refines tables and figures

Nuclei Microcontroller Software Interface Standard V1.0.0-alpha.1

From release v1.0.0-alpha to now, these changes have been made to NMSIS.

API changes has been maded to system timer.

• Start from Nuclei N core version 1.4, MSTOP register is renamed to MTIMECTL to provide more features

• Changes made to NMSIS/Core/core_feature_timer.h

  • MSTOP register name changed to MTIMECTL due to core spec changes
  • SysTimer_SetMstopValue renamed to SysTimer_SetControlValue
  • SysTimer_GetMstopValue renamed to SysTimer_GetControlValue
  • Add SysTimer_Start and SysTimer_Stop to start or stop system timer counter
  • SysTick_Reload function is introduced to reload system timer
  • Macro names started with SysTimer_xxx are changed, please check in the code.

• Removed unused lines of code in DSP and NN library source code which has unused macros which will not work for RISCV cores.

• Fix some documentation issues, mainly typos and invalid cross references.

Nuclei Microcontroller Software Interface Standard V1.0.0-alpha

This is the V1.0.0-alpha release of Nuclei MCU Software Interface Standard(NMSIS).

In this release, we have release three main compoments:

• NMSIS-Core: Standardized API for the Nuclei processor core and peripherals.

• NMSIS-DSP: DSP library collection optimized for the Nuclei Processors which has RISC-V SIMD instruction set.

• NMSIS-NN: Efficient neural network library developed to maximize the performance and minimize the memory footprint Nuclei Processors which has RISC-V SIMD instruction set.

We also released totally new Nuclei-SDK which is an SDK implementation based on the NMSIS-Core for Nuclei N/NX evaluation cores running on HummingBird Evaluation Kit.