samples: hello_ei: Switch to usage of EI SDK Zephyr module

- Use EI SDK Zephyr module instead of SDK deployed from
EI studio, inside zip file.
- Assume usage of model deployment in from of Zephyr
library, update provided model.
- Remove possibility to download zipped model from the web,
only local files are supported now.
- Update sdk-edge-ai west manifest to download EI SDK
v1.82.3 and add EI west extensions commands.

Jira: NCSDK-36946

Signed-off-by: Bartosz Meus <bartosz.meus@nordicsemi.no>

Author: mbarchie

samples/edge_impulse/hello_ei/CMakeLists.txt

@@ -19,8 +19,36 @@ target_include_directories(app PRIVATE
   src/include
 )
 
-# Add Edge Impulse library as a separate module
-add_subdirectory(edge_impulse)
+# Enable C linkage for Edge Impulse module (allows calling from C code)
+zephyr_compile_definitions(
+  EI_C_LINKAGE=1
+  EIDSP_SIGNAL_C_FN_POINTER=1
+)
+
+# Suppress warnings generated by Edge Impulse SDK
+zephyr_compile_options(
+  -Wno-double-promotion
+  -Wno-unused
+  -Wno-sign-compare
+  -Wno-maybe-uninitialized
+)
+
+# Expand any ${VARIABLES} in the path
+string(CONFIGURE ${CONFIG_EDGE_IMPULSE_PATH} CONFIG_EDGE_IMPULSE_PATH)
+
+# Convert relative paths to absolute paths
+if(NOT IS_ABSOLUTE ${CONFIG_EDGE_IMPULSE_PATH})
+  # Using application source directory as base directory for relative path
+  set(CONFIG_EDGE_IMPULSE_PATH ${APPLICATION_SOURCE_DIR}/${CONFIG_EDGE_IMPULSE_PATH})
+endif()
+
+set(FETCH_CONTENT_NAME edge_impulse)
+
+include(FetchContent)
+
+FetchContent_Declare(
+    ${FETCH_CONTENT_NAME}
+    URL ${CONFIG_EDGE_IMPULSE_PATH}
+)
 
-# Link Edge Impulse library to application
-target_link_libraries(app PRIVATE edge_impulse)
+FetchContent_MakeAvailable(${FETCH_CONTENT_NAME})

samples/edge_impulse/hello_ei/Kconfig

@@ -6,17 +6,11 @@
 
 mainmenu "Hello Edge Impulse sample application"
 
-config EDGE_IMPULSE_URI
-	string "Edge Impulse library URI"
-	default 'edge_impulse/nrf_accel_sim-v35.zip'
+config EDGE_IMPULSE_PATH
+	string "Edge Impulse library path"
+	default 'ei_model_nrf_accel_sim_v39.zip'
 	help
-	  Specify URI used to access archive with Edge Impulse library.
-	  The library will be downloaded into the build directory. You can specify
-	  more than one URI separated by a semicolon.
-	  Make sure to specify the HTTP API key header as EI_API_KEY_HEADER
-	  variable during build if the HTTP server uses it.
-	  You can also specify the absolute file path of a local file. In that
-	  case, only one URI has to be defined.
+	  Specifies local file path of an archive containing Edge Impulse library.
 
 config EDGE_IMPULSE_DEBUG_MODE
 	bool "Run Edge Impulse library in debug mode"

samples/edge_impulse/hello_ei/edge_impulse/CMakeLists.ei.template

@@ -16,3 +16,6 @@ CONFIG_FP16=n
 CONFIG_REQUIRES_FULL_LIBCPP=y
 CONFIG_CBPRINTF_FP_SUPPORT=y
 CONFIG_FPU=y
+
+# Enable Edge Impulse SDK
+CONFIG_EDGE_IMPULSE_SDK=y

samples/edge_impulse/hello_ei/edge_impulse/CMakeLists.txt

@@ -7,8 +7,8 @@
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
 
-#include "edge-impulse-sdk/dsp/numpy_types.h"
-#include "edge-impulse-sdk/classifier/ei_classifier_types.h"
+#include <edge-impulse-sdk/dsp/numpy_types.h>
+#include <edge-impulse-sdk/classifier/ei_classifier_types.h>
 
 #include "input_data.h"
 

samples/edge_impulse/hello_ei/edge_impulse/nrf_accel_sim-v35.zip

@@ -18,5 +18,11 @@ manifest:
       revision: v3.2.0
       import: true
 
+    - name: edge-impulse-sdk-zephyr
+      url: https://github.com/edgeimpulse/edge-impulse-sdk-zephyr
+      path: modules/edge-impulse-sdk-zephyr
+      revision: v1.82.3
+      west-commands: west/west-commands.yml
+
   self:
     path: edge-ai