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PR IntelRealSense#12506 from Nir-Az: Spell fix on Jetson docs
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Nir-Az authored Dec 11, 2023
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# NVidia Jetson Devices
# Nvidia Jetson Devices

**NOTE**: See [support-matrix.md](./support-matrix.md) to learn more about Jetson support for RealSense devices.

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### 1. Prerequisites

* NVIDIA® **Jetson Nano™**, **Jetson TX2™** and **Jetson AGX Xavier™** board (may also work on other Jetson devices)
* Nvidia® **Jetson Nano™**, **Jetson TX2™** and **Jetson AGX Xavier™** board (may also work on other Jetson devices)
* RealSense **D415**, **D435**, **D435i**, **D455** and **L515** Camera devices.

### 2. Establish Developer's Environment

Follow [official instructions](https://developer.nvidia.com/embedded/learn/getting-started-jetson) to get your board ready. This guide will assume you are using **NVIDIA® L4T Ubuntu 16.04/18.04/20.04** image with kernels 4.9/5.10. Note that in most cases it is necessary to install a toll named "SDK Manager" to flash and install **Jetson** boards with both the L4T (Linux for Tegra) and NVIDIA-specific software packages (CUDA, Tensor Flow, AI, etc.)
Follow [official instructions](https://developer.nvidia.com/embedded/learn/getting-started-jetson) to get your board ready. This guide will assume you are using **Nvidia® L4T Ubuntu 16.04/18.04/20.04** image with kernels 4.9/5.10. Note that in most cases it is necessary to install a toll named "SDK Manager" to flash and install **Jetson** boards with both the L4T (Linux for Tegra) and Nvidia-specific software packages (CUDA, Tensor Flow, AI, etc.)
For **Jetson Nano™** we strongly recommend enabling the Barrel Jack connector for extra power (See [jetsonhacks.com/jetson-nano-use-more-power/](https://www.jetsonhacks.com/2019/04/10/jetson-nano-use-more-power/) to learn how)

![Jetson Nano](./img/jetson.jpg)
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In order to enable the full capabilities of RealSense devices certain modifications in the kernel (driver) modules shall be applied, such as support of Depth-related streaming formats and access to per-frame metadata attributes. There is a small set of generic kernel changes that are mostly retrofitted with more advanced kernel versions aimed at improving the overall drivers stability.

NVIDIA's L4T delivers an Ubuntu-based distribution with a customized kernel based on version 4.9/5.10. The way the kernel is configured and deployed is different from a desktop Ubuntu image with two notable differences being the list of kernel modules included in default configuration and the way a new image is flashed.
Nvidia's L4T delivers an Ubuntu-based distribution with a customized kernel based on version 4.9/5.10. The way the kernel is configured and deployed is different from a desktop Ubuntu image with two notable differences being the list of kernel modules included in default configuration and the way a new image is flashed.

And while it is possible to rebuild and flash a new kernel image the procedure can be perceived as challenging and shall be performed with extra caution.
This guide comes with a script that allows to modify the kernel modules with Librealsense2-related patches without replacing the kernel image. The script has been verified with **Jetson AGX Xavier™** board using L4T versions 4.2.3, 4.3, 4.4 (Sept 2020) and 5.0.2. Scroll to the end of the guide for details.
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cmake .. -DBUILD_EXAMPLES=true -DCMAKE_BUILD_TYPE=release -DFORCE_RSUSB_BACKEND=false -DBUILD_WITH_CUDA=true && make -j$(($(nproc)-1)) && sudo make install
```

The CMAKE `-DBUILD_WITH_CUDA=true` flag assumes CUDA modules are installed. If not, please reconnect the board to the Ubuntu Host PC and use NVIDIA `SDK Manager` tool to install the missing components.
The CMAKE `-DBUILD_WITH_CUDA=true` flag assumes CUDA modules are installed. If not, please reconnect the board to the Ubuntu Host PC and use Nvidia `SDK Manager` tool to install the missing components.

* **Connect Realsense Device, run `realsense-viewer` and inspect the results**

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