message: Adding instructions on how to run CMSIS-NN opt kernels using mbed
diff: @@ -366,17 +366,46 @@ optimizations and link it with the microlite lib.
  To utilize the CMSIS-NN optimized kernels, choose your target, e.g. Bluepill,
  and build with:
  -make -f tensorflow/lite/experimental/micro/tools/make/Makefile TAGS=cmsis-nn
  -TARGET=bluepill test
  +```
  +make -f tensorflow/lite/experimental/micro/tools/make/Makefile TAGS=cmsis-nn TARGET=bluepill test
  +```
  That will build the microlite lib including CMSIS-NN optimized kernels based on
  the version downloaded by 'download_dependencies.sh', so make sure you have run
  this script. If you want to utilize another version of CMSIS, clone it to a
  custom location run the following command:
  -make -f tensorflow/lite/experimental/micro/tools/make/Makefile
  -CMSIS_PATH=<CUSTOM_LOCATION> TAGS=cmsis-nn TARGET=bluepill test (--- Under
  -development, it will build, but test will fail ---)
  +```
  +make -f tensorflow/lite/experimental/micro/tools/make/Makefile CMSIS_PATH=<CUSTOM_LOCATION> TAGS=cmsis-nn TARGET=bluepill test
  +```
  +
  +To test the optimized kernel(s) on your target platform using mbed (depthwise
  +conv in this example), follow these steps:
  +
  +1. Clone CMSIS to a custom location (<CUSTOM_LOCATION>) url:
  + https://github.com/ARM-software/CMSIS_5.git Make sure you're on the
  + development branch.
  +2. Generate the project for depthwise conv mbed test:
  +```
  +make -f tensorflow/lite/experimental/micro/tools/make/Makefile TAGS=cmsis-nn CMSIS_PATH=<CUSTOM_LOCATION> generate_depthwise_conv_test_mbed_project
  +```
  +3. Go to the generated mbed folder:
  +```
  +cd tensorflow/lite/experimental/micro/tools/make/gen/linux_x86_64/prj/depthwise_conv_test/mbed
  +```
  +4. Follow the steps in README_MBED.md to setup the environment. Or simply do:
  + ```
  +mbed config root .
  +mbed deploy
  +python -c 'import fileinput, glob;
  +for filename in glob.glob("mbed-os/tools/profiles/*.json"):
  + for line in fileinput.input(filename, inplace=True):
  + print(line.replace("\"-std=gnu++98\"","\"-std=gnu++11\", \"-fpermissive\""))'
  +```
  +7. Compile and flash. The 'auto' flag requires your target to be plugged in.
  +```
  +mbed compile -m auto -t GCC_ARM -f --source . --source <CUSTOM_LOCATION>/CMSIS/NN/Include --source <CUSTOM_LOCATION>/CMSIS/NN/Source/ConvolutionFunctions --source <CUSTOM_LOCATION>/CMSIS/DSP/Include --source <CUSTOM_LOCATION>/CMSIS/Core/Include -j8
  +```
  ## Goals
  