os/board/rtl8730e&rtl8721csm: Support CMSIS

[ZhenBei-Sin]

external/cmsis: Add CMSIS in the external
Change Notes:

• Port CMSIS-DSP for rtl8721csm https://github.com/ARM-software/CMSIS-DSP/tree/v1.15.0
  os/arch/arm/include/amebad/cmsis_dsp/*

• Add the CMSIS-DSP and CMSIS-NN lib to external folder
  external/cmsis_dsp/*
  external/cmsis_nn/*

• Delete the previous located CMSIS lib from the os folder
  os/arch/arm/src//Make.defs
  os/arch/arm/src//Kconfig
  os/board//src/libs/

apps/examples/board_specific_demo: Add CMSIS example
Change Notes:

• Add CMSIS-DSP example for rtl8721csm
  apps/examples/board_specific_demo/ameba_cmsis_dsp_demo/*

• Standard Code Formatting and clean up the naming
  apps/examples/board_specific_demo/ameba_cmsis_nn_demo/example_cmsis_nn.c
  apps/examples/board_specific_demo/ameba_cmsis_nn_demo/Makefile

build/configs/rtl8730e&rtl8721csm: Adjust defconfig for CMSIS
rtl8730e: Support CMSIS-NN
rtl8721csm: Support CMSIS-NN and CMSIS-DSP

Change Notes:

• Modify the config for the CMSIS macro
  CONFIG_AMEBAx_CMSIS_NN -> CONFIG_EXTERNAL_CMSIS_NN
  CONFIG_EXTERNAL_CMSIS_DSP

[sunghan-chang]

Let's split the commit as 3 commits

1. add cmsis in the external (including removing from os)
2. add example in the apps
3. adjust defconfig for cmsis

[Taejun-Kwon]

In our side, we checked performance became better. How about your side?

[Dane-Kang]

In our side, we checked performance became better. How about your side?

Hi @Taejun-Kwon , May i know if you tested on loadable app config also ?
In our side, There are link issue like over during build.
#6196 (comment)

So, Zhenbei asked how to resolve it .

[vibhor-m]

May i know if you tested on loadable app config also ?

We tested loadable configuration with cmsis_nn, it was working fine. Now I see @sunghan-chang has suggested not to change os/*.mk files. So we will check the compilation again and share result with you.

[aadotverma]

In our side, we checked performance became better. How about your side?

Hi @Taejun-Kwon , May i know if you tested on loadable app config also ? In our side, There are link issue like over during build. #6196 (comment)

So, Zhenbei asked how to resolve it .

Hello @ZhenBei-Sin,
Please refer the following commit for resolving cmsis library linking issue.
aadotverma@5e52390
Compilation is success for cmsis_nn for both rtl8721csm/hello & rtl8721csm/loadable_apps configuration.
but for cmsis_dsp, multiple definition error is coming for rtl8721csm/loadable_apps.
I checked, some symbols are defined two times in cmsis_dsp library.

[ZhenBei-Sin]

In our side, we checked performance became better. How about your side?

Hi @Taejun-Kwon , May i know if you tested on loadable app config also ? In our side, There are link issue like over during build. #6196 (comment)
So, Zhenbei asked how to resolve it .

Hello @ZhenBei-Sin, Please refer the following commit for resolving cmsis library linking issue. aadotverma@5e52390 Compilation is success for cmsis_nn for both rtl8721csm/hello & rtl8721csm/loadable_apps configuration. but for cmsis_dsp, multiple definition error is coming for rtl8721csm/loadable_apps. I checked, some symbols are defined two times in cmsis_dsp library.

Hi @aadotverma ，

Thank you for assist to archive cmsis lib into libexternal.a for loadable_apps.

I updated the latest lib_cmsis_dsp.a, which solved the multiple definition error.
Root Cause: Include the .c multiple time cause multiple definition (example: ComplexMathFunctions.c)
https://github.com/ARM-software/CMSIS-DSP/blob/v1.15.0/Source/ComplexMathFunctions/ComplexMathFunctions.c

[ZhenBei-Sin]

Let's split the commit as 3 commits

1. add cmsis in the external (including removing from os)
2. add example in the apps
3. adjust defconfig for cmsis

Solved the link lib for loadable_apps.
Will proceed to resolve the conflicts and separate to 3 commits.

[ZhenBei-Sin]

Hi @sunghan-chang , @Taejun-Kwon , @vibhor-m , @aadotverma

Please help to review the final changes.
Thank You.