imx-machine-learning: check vela return code

Return an error in case any of the models could not be converted.

https://onedigi.atlassian.net/browse/DEL-9424

Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>

meta-digi-dey/dynamic-layers/imx-machine-learning/recipes-libraries/eiq-examples/eiq-examples/0003-check-vela-return-code.patch

@@ -0,0 +1,26 @@
+From: Isaac Hermida <isaac.hermida@digi.com>
+Date: Tue, 17 Dec 2024 18:34:48 +0100
+Subject: [PATCH] check vela return code
+
+Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>
+---
+ download_models.py | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/download_models.py b/download_models.py
+index 462f7b755eea..fc5ab234ae47 100644
+--- a/download_models.py
++++ b/download_models.py
+@@ -103,7 +103,11 @@ def convert_model(model_dir, vela_dir):
+         if name.endswith(".tflite"):
+             print('Converting', name)
+             model = os.path.join(model_dir, name)
+-            os.system('vela ' + model + " --output-dir " + vela_dir)
++            ret = os.system('vela ' + model + " --output-dir " + vela_dir)
++            if ret != 0:
++                print(f"Error: Failed to convert model {name} with vela")
++                import sys
++                sys.exit(1) 
+ 
+ model_dir = 'models'
+ vela_dir = 'vela_models'

meta-digi-dey/dynamic-layers/imx-machine-learning/recipes-libraries/eiq-examples/eiq-examples_git.bbappend

@@ -11,6 +11,7 @@ VELA_MODELS_DIR = "vela_models"
 SRC_URI += " \
     file://0001-Customize-EiQ-demos.patch \
     file://0002-improvements-capture-x-windows-and-increase-resoluti.patch \
+    file://0003-check-vela-return-code.patch \
     file://scripts/launch_eiq_demo.sh \
     file://service/eiqdemo.service \
 "