darknet YOLO: Real-Time Object Detection

apps/mlearning/darknet vendors Darknet, the framework behind YOLO (You Only Look Once) object detection.

Enable CONFIG_DARKNET_YOLO. CONFIG_DARKNET_YOLO_VER is the Git branch fetched at build time (default master), not a commit pin. Upstream pjreddie/darknet is unmaintained, so the fetched tree can change between builds. There is no NuttX example application and no CMake build; the Makefile compiles the core Darknet sources (network, parser, convolutional and connected layers, YOLO/region/detection layers, RNN/GRU/LSTM, and image helpers).

Include path: apps/mlearning/darknet/darknet/include.

Darknet is a larger, floating-point oriented stack compared with TensorFlow Lite Micro. Prefer tflite-micro TensorFlow Lite Micro for microcontroller-class inference.