1. PIXCI® Imaging Software and Drivers Installation: nVidia Xavier (ARM-aarch64)

This application note outlines the installation of XCAP software and drivers for PIXCI® frame grabbers on the nVidia Xavier with ARM‑aarch64 processor running Linux. Changes to the Xavier and its Linux can be expected; this application note was written with the Xavier and Linux released circa April 2019 (Linux for Tegra r32.1 with kernel 4.9.140-tegra). Additional information for other releases of Tegra follow.

Install or update Linux. The original release of Linux for nVidia Xavier is Tegra r31.1 with kernel 4.9.108-tegra; use of Tegra r32.1 with kernel 4.9.140-tegra, or later, is strongly recommended. Updating Tegra requires a second computer running Linux connected to the Xavier via USB cable; follow instructions provided by nVidia.
Install JRE. Unlike XCAP for x86 and x86‑64 platforms, XCAP for nVidia Xavier does not include a Java Runtime Environment. If the Java JRE for Linux is not already installed, install the Java JRE from the Linux distribution and repository:
```
    apt-get update
    apt-get -y install openjdk-jre-8
```
(Use of ''default-jre'' is not recommended; specifically, issues have been noted with openjdk‑jre‑11 and is not recommended).
Note: If the Java JRE for Linux is not already installed, newer releases of the XCAP installer (below) will offer to install the Java JRE from the Linux distribution and repository.
Install XCAP. Use the internet browser to download xcaplnx_aarch64.bin from www.epixinc.com/support/files.php. Or download with:
```
    wget ftp://ftp.epixinc.com/software/xcap_v38/xcaplnx_aarch64.bin
```
for the current release version, or:
```
    wget ftp://ftp.epixinc.com/downloads/xcaplnx_aarch64.bin
```
for the (next) prerelease version. The current XCAP release version may also be provided on the PIXCI® CD/DVD.
Do:
```
    chmod a+x xcaplnx_aarch64.bin
    ./xcaplnx_aarch64.bin
```
to execute the XCAP installer.
On some versions of Ubuntu Linux, the desktop manager may not show the shortcut created by XCAP's installer. Using the Linux file browser, find /usr/share/applications/xcap.desktop, then copy same and paste onto the desktop.
XCAP's installer will offer to start XCAP. Or, use the XCAP shortcut, above. Or, use
```
    xcap
```
from a terminal prompt.
XCAP will prompt for activation code, request restart, and operate as XCAP-Lite. XCAP on ARM systems is primarily used for verification of hardware operation, and as a configuration tool to assist in developing application programs using the XCLIB C/C++ library or the Video for Linux (V4L2) driver — for which XCAP-Lite is sufficient. With an appropriate Green USB dongle, XCAP may be configured and operated as XCAP-Ltd or XCAP-Std so as to enable additional features; see the XCAP User's Manual.

Install PIXCI® driver. One or more precompiled PIXCI® drivers are provided with XCAP. If one of these drivers match the current kernel's version, use XCAP's:

    PIXCI®
    PIXCI® Open/Close
    Close (if open)
    Driver Assistant
    Install PIXCI® Driver
    Install Precompiled Driver
    Apply

Alternately, the PIXCI® driver can be compiled so as to match the current kernel's version. Use XCAP's:

    PIXCI®
    PIXCI® Open/Close
    Close (if open)
    Driver Assistant
    Install PIXCI® Driver
    Compile & Install Driver
    Apply

The amount of frame buffer memory available for image capture is determined by the amount of memory requested by the PIXCI® driver. This is set in the same manner as for x86 or x86‑64 systems; typically using XCAP:
```
    PIXCI®
    PIXCI® Open/Close
    Close (if open)
    Driver Assistant
    Set Frame Buffer Memory Size
    ...
```
Unlike Tegra for TX2, it is not necessary to configure Tegra for Xavier so as to specify the required amount of ''coherent-memory.'' XCAP's ''Forceful Memory Allocation'' option, used with the memory architecture of x86 and x86‑64 systems, is not applicable to the Xavier.
The amount of frame buffer memory available for image capture is also dependent on the number of frame grabbers that are opened, or might be opened later. Deselecting:
```
    PIXCI®
    PIXCI® Open/Close
    Close (if open)
    Advanced
    Memory (tab)
    Reserve and Share Frame Buffer Memory
```
allows all of the memory to be used by one frame grabber and camera.
Reboot Xavier.
If using the XCLIB or XCLIB+PXIPL C/C++ library, download: xcliblnx_aarch64.bin or xcliplnx_aarch64.bin from www.epixinc.com/support/files.php. Install with:
```
    chmod a+x xclib_aarch64.bin
    ./xcliblnx_aarch64.bin
```
or
```
    chmod a+x xclip_aarch64.bin
    ./xcliplnx_aarch64.bin
```

1.1. Additional Tips

If application software reports that the PIXCI® frame grabber isn't installed, run the:
```
    lspci
```
Linux application. If ''lspci'' doesn't list the PIXCI® frame grabber, then the Linux PCIe bus manager hasn't detected the card and fiddling with the PIXCI® driver and its settings won't help.
An environment variable for Java may not be set correctly; running XCAP results in:
```
    Unsatisfied link error ... libjawt.so
```
Edit /usr/local/xcap/xcaplnx and add, as second and third lines:
```
    LIBJAWT=$( find /usr -name libjawt.so | sed -e s:/libjawt.so:: )
    export LD_LIBRARY_PATH=$LIBJAWT
```
so as to point ''LD_LIBRARY_PATH'' to the directory containing libjawt.so. The above fix assumes a single version of Java is installed. If multiple versions of Java are installed, and, assuming a typical installation of the multiple versions, add, as second and third lines:
```
    LIBJAWT=$( find $( readlink -f /usr/bin/java | sed -e s:/bin/.*:: ) -name libjawt.so | sed -e s:/libjawt.so:: )
    export LD_LIBRARY_PATH=$LIBJAWT
```
The /usr/local/xcap/xcaplnx contains these lines, as comments, ready to be uncommented.
Or, for atypical Java installations, edit /usr/local/xcap/xcaplnx and set ''LD_LIBRARY_PATH'' to the appropriate directory containing libjawt.so.
Newer releases of XCAP implement a workaround for this issue; editing /usr/local/xcap/xcaplnx is not required. (Circa July 2021).

1.2. Tegra Notes

Tegra r31.1 with kernel 4.9.108-tegra: This version of Tegra is internally marked as a ''debug'' version and exhibits various problems; use of this version of Tegra is not recommended.
Tegra r32.1 with kernel 4.9.140-tegra: This version of Tegra is recommended.

Updated: 11-Aug-2025