esp_nn.h File During Compilation with -D ESP_NN (TFMIC-34)

[pravee625]

When I include the -D ESP_NN flag in my platformio.ini, I encounter the following error during compilation:

Compiling .pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\add.cc.o
Compiling .pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\conv.cc.o
lib/tfmicro/tensorflow/lite/micro/kernels/esp_nn/add.cc:34:10: fatal error: esp_nn.h: No such file or directory

---

• Looking for esp_nn.h dependency? Check our library registry!
• CLI > platformio lib search "header:esp_nn.h"
• Web > https://registry.platformio.org/search?q=header:esp_nn.h

---

#include <esp_nn.h>
^~~~~~~~~~
compilation terminated.
Compiling .pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\depthwise_conv.cc.o
*** [.pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\add.cc.o] Error 1
lib/tfmicro/tensorflow/lite/micro/kernels/esp_nn/conv.cc:30:10: fatal error: esp_nn.h: No such file or directory

---

• Looking for esp_nn.h dependency? Check our library registry!
• CLI > platformio lib search "header:esp_nn.h"
• Web > https://registry.platformio.org/search?q=header:esp_nn.h

---

#include <esp_nn.h>
^~~~~~~~~~
compilation terminated.
*** [.pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\conv.cc.o] Error 1
lib/tfmicro/tensorflow/lite/micro/kernels/esp_nn/depthwise_conv.cc:30:10: fatal error: esp_nn.h: No such file or directory

---

• Looking for esp_nn.h dependency? Check our library registry!
• CLI > platformio lib search "header:esp_nn.h"
• Web > https://registry.platformio.org/search?q=header:esp_nn.h

---

#include <esp_nn.h>
^~~~~~~~~~
compilation terminated.
*** [.pio\build\esp-wrover-kit\libde0\tfmicro\tensorflow\lite\micro\kernels\esp_nn\depthwise_conv.cc.o] Error 1
========================================================= [FAILED] Took 31.34 seconds =========================================================

• The terminal process "C:\Users\prave.platformio\penv\Scripts\platformio.exe 'run'" terminated with exit code: 1.
• Terminal will be reused by tasks, press any key to close it.

When I remove the -D ESP_NN flag from my platformio.ini, the compilation is successful.

Is the esp_nn.h file not present in the esp-tflite-micro library?
How can I properly include the ESP-NN library while compiling in PlatformIO?

I am attaching my platformio.ini file for your reference

[vikramdattu]

@pravee625 is this issue still valid after #93 is addressed?

[pravee625]

@vikramdattu Yes, I am still unable to compile with -D ESP_NN if declared in my platformio.ini file

if ESP_NN is declared in platformio.ini
then esp_nn.h file is required

esp-tflite-micro/tensorflow/lite/micro/kernels/esp_nn/add.cc

Line 34 in e63e91b

#include <esp_nn.h>

and I am unable to find that file in the current repo...

[vikramdattu]

Hi @pravee625 esp-nn is separate component and with esp-idf's build system, it gets pulled in transparently as a dependency to esp-tflite-micro. This happens via dependency specified in idf_component.yml:

esp-tflite-micro/idf_component.yml

Lines 10 to 12 in e63e91b

	espressif/esp-nn:
	version: "^1.0.0-rc1"
	pre_release: true

For platform.io, can you please follow this piece of documentation?
esp-nn can be cloned from here and you can then add it manually as per above documentation.

[pravee625]

Thanks for the help @vikramdattu. My code is working fine, and esp_nn is successfully integrated. You can close this issue as well as the other issue: #90. The previous issue was also caused by esp_nn optimizations not being included. Now, my inference time has decreased from 900ms to 200ms.

[vikramdattu]

Hi @pravee625 thanks for the confirmation. Closing this issue!