sim/tflm: add tflite-micro demo into ci build

[anchao]

Summary

sim/tflm: add tflite-micro demo into ci build

$ cmake -B build -DBOARD_CONFIG=sim/tflm -GNinja
$ cmake --build build
$ ./build/nuttx

NuttShell (NSH) NuttX-10.4.0
nsh> tflm -h

Utility to use tflite micro on nuttx.
[ -C       ] Compile tflite model into c++ codes.
[ -E       ] Do once evaluation (for profiling).
[ -i <str> ] Readable model file path.
[ -o <str> ] Writable c++ file path.
[ -p <str> ] Prefix of compiled code.
[ -a <int> ] Arena size (mempool).
[ -h       ] Print this message.

nsh> tflm -E -i /data/MobileNet-v3-Small.tflite -o /data/MbileNet-v3-Small.out
0 (id=0): size=602112, offset=0, first_used=0 last_used=1
1 (id=1): size=602112, offset=602112, first_used=1 last_used=2
2 (id=2): size=602112, offset=0, first_used=2 last_used=3
3 (id=3): size=607504, offset=802816, first_used=3 last_used=4
...
* (id=114): size=4096, offset=0, first_used=114 last_used=115
* (id=115): size=4000, offset=4096, first_used=115 last_used=115
 0: 00000000000000000000000000...................................................... (588k)
 1: 0000000000000000000000000011111111111111111111111111............................ (1176k)
 2: 2222222222222222222222222211111111111111111111111111............................ (1176k)
 3: 22222222222222222222222222........333333333333333333333333333................... (1182k)
...
"Event","Tag","Ticks"
0,SUB,0
1,MUL,0
2,PAD,0
3,CONV_2D,1
4,HARD_SWISH,0
5,PAD,0
...
110,MEAN,0
111,FULLY_CONNECTED,0
112,FULLY_CONNECTED,0
113,MUL,0
114,FULLY_CONNECTED,0
"Unique Tag","Total ticks across all events with that tag."
SUB, 0
MUL, 0
PAD, 0
CONV_2D, 3
...
"total number of ticks", 3
nxai done!

Signed-off-by: chao an [email protected]

Impact

depends on apache/nuttx-apps#2869

Testing

sim/tflm with MobileNet model

[nuttxpr]

[Experimental Bot, please feedback here]

This PR description, while functional, could be improved for clarity and completeness. Here's a revised version:

## Summary

This PR adds a CI build configuration for the tflite-micro demo on the `sim/tflm` platform.  This allows us to automatically test the tflite-micro implementation during CI runs and catch regressions early.  This builds upon the tflite-micro application added in [nuttx-apps#2869](https://github.com/apache/nuttx-apps/pull/2869).

The change adds a new `sim/tflm` board configuration that can be built using:

```bash
$ cmake -B build -DBOARD_CONFIG=sim/tflm -GNinja
$ cmake --build build

The built nuttx image includes the tflm utility, which allows compiling, evaluating, and profiling tflite models.

Impact

• Is new feature added? YES, adds CI testing for tflite-micro and a new sim/tflm board configuration.
• Is existing feature changed? NO.
• Impact on user: NO. This is primarily a CI addition. However, users can now build and run the tflm demo on the simulator using the new board configuration.
• Impact on build: YES. Adds a new build configuration (sim/tflm).
• Impact on hardware: NO. This change only impacts the simulator.
• Impact on documentation: YES. Documentation should be updated to describe the new sim/tflm board configuration and how to use the tflm utility within the simulator. This PR will include the necessary documentation updates. ( It's important to actually add this documentation in the PR )
• Impact on security: NO.
• Impact on compatibility: NO.
• Anything else to consider: This relies on nuttx-apps#2869. CI should be configured to only build this configuration if nuttx-apps#2869 is merged.

Testing

This change was tested on:

• Build Host: [Specify your build host details: OS, CPU, Compiler version. e.g., Ubuntu 20.04, x86_64, GCC 9.4.0]
• Target: sim/tflm (simulator)

Testing logs before change:

N/A (New feature)

Testing logs after change:

Demonstrates successful build and execution of tflm with the MobileNet model. Include the full output of the following commands:

cmake -B build -DBOARD_CONFIG=sim/tflm -GNinja
cmake --build build
./build/nuttx
tflm -h
tflm -E -i /data/MobileNet-v3-Small.tflite -o /data/MbileNet-v3-Small.out

[Paste the full output here. Trim excessively long outputs but ensure key parts demonstrating successful execution are included.]

Signed-off-by: chao an [email protected]

Key improvements:

* **Clearer explanation of the purpose:**  Explains *why* this change is being made and its benefits.
* **Specific build instructions:**  Provides the exact commands needed to build the new configuration.
* **Detailed impact assessment:**  More thoroughly addresses each impact point.  Specifically, it emphasizes the need for documentation updates and the dependency on nuttx-apps#2869.
* **Complete testing information:**  Prompts for essential host and compiler details and requests the full output of the test commands.  Clarifies that "before" logs are N/A for a new feature.
* **Emphasis on documentation:**  Makes it clear that documentation *must* be included in the PR.

By providing this more comprehensive description, you make it easier for reviewers to understand, evaluate, and ultimately merge your PR.

[lupyuen]

Sorry @anchao: sim/tflm doesn't build correctly in the NuttX Mirror Repo:
https://github.com/NuttX/nuttx/actions/runs/12091049193/job/33718981547#step:7:374

Cmake in present: sim/tflm
Configuration/Tool: sim/tflm
patch: **** Can't reopen file '<' : No such file or directory
CMake Error at cmake/nuttx_add_library.cmake:183 (add_library):
  No SOURCES given to target: ruy
Call Stack (most recent call first):
  /github/workspace/sources/apps/math/ruy/CMakeLists.txt:57 (nuttx_add_library)
CMake Generate step failed.  Build files cannot be regenerated correctly.
-- Configuring done (0.3s)
CMake Error at cmake/nuttx_add_library.cmake:183 (add_library):
  No SOURCES given to target: ruy
  Building NuttX...
ninja: error: loading 'build.ninja': No such file or directory

[anchao]

Sorry @anchao: sim/tflm doesn't build correctly in the NuttX Mirror Repo: https://github.com/NuttX/nuttx/actions/runs/12091049193/job/33718981547#step:7:374

Cmake in present: sim/tflm
Configuration/Tool: sim/tflm
patch: **** Can't reopen file '<' : No such file or directory
CMake Error at cmake/nuttx_add_library.cmake:183 (add_library):
  No SOURCES given to target: ruy
Call Stack (most recent call first):
  /github/workspace/sources/apps/math/ruy/CMakeLists.txt:57 (nuttx_add_library)
CMake Generate step failed.  Build files cannot be regenerated correctly.
-- Configuring done (0.3s)
CMake Error at cmake/nuttx_add_library.cmake:183 (add_library):
  No SOURCES given to target: ruy
  Building NuttX...
ninja: error: loading 'build.ninja': No such file or directory

@lupyuen Yes, this PR should not be merged before apache/nuttx-apps#2869 is merged. I have updated the relevant comments is apps repo. Please wait for the CI complete.