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runExecutable

Launch an executable on the NVIDIA target by name

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Add-On Required: This feature requires the MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms add-on.

Syntax

procID = runExecutable(hwObj,exe)
procID = runExecutable(___,exeArgs)

Description

procID = runExecutable(hwObj,exe) launches the executable specified by exe on the NVIDIA® target board desktop. exe must include the complete path to the executable.

It is recommended to use the runApplication function to launch an executable on the target. With this function, the software can automatically determine the location of the executable on the NVIDIA target.

example

procID = runExecutable(___,exeArgs) launches the executable specified by exe on the NVIDIA target board desktop. exeArgs is used to specify run-time arguments to the executable.

Examples

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This example shows how to launch an executable on the NVIDIA Jetson™ TX2 target. This example requires a USB camera connected to the NVIDIA target.

Create a live hardware connection from the MATLAB® software to the NVIDIA hardware by using the jetson function. To create a live hardware connection object, provide the host name or IP address, user name, and password of the target board. For example:

hwobj = jetson('jetson-board-name','ubuntu','ubuntu');

Create a MATLAB function liveCapture.m that connects to the webcam on a Jetson TX2 board and displays the image on the board. This function acts as the entry-point for code generation.

function liveCapture() %#codegen

% To enable code generation for hardware interfaces
hwobj = jetson;
w = webcam(hwobj,1,'1280x800');
d = imageDisplay(hwobj);

for k = 1:2000
    % Capture the image from the webcam on hardware.
    img = snapshot(w);
    % Display image.
    image(d,img);
end

Create a GPU code configuration object for generating an executable. Use the coder.hardware function to create a configuration object for the Jetson platform and assign it to the Hardware property of the code configuration object cfg.

cfg = coder.gpuConfig('exe');
cfg.GenerateReport = true;
cfg.Hardware = coder.hardware('NVIDIA Jetson');
cfg.CustomInclude = fullfile('codegen','exe','liveCapture','examples');
cfg.CustomSource  = fullfile('codegen','exe','liveCapture','examples','main.cu');

The main.cu file is generated as part of code generation process. For this example, you can use this file without modification.

To generate CUDA® code, use the codegen command and pass the GPU code configuration object along with the liveCapture entry-point function. After the code generation takes place on the host, the generated files are copied over and built on the target.

codegen -config cfg liveCapture

Use the runExecutable function to launch the executable on the TX2 board.

exe = [hwobj.workspaceDir '/liveCapture.elf'];
procID = runExecutable(hwobj,exe)

### Launching the executable on the target...
Executable launched successfully with process ID 12821.
Displaying the simple runtime log for the executable...

Input Arguments

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Connection to a specific NVIDIA hardware board, specified as a jetson or drive object.

Specify the full path to the application that must be launched on the NVIDIA target desktop. You can use the workspaceDir property of the jetson or drive object to determine the standard location of the application.

Example: '/home/ubuntu/myLiveEdgeDetect/MATLAB_ws/R2019a/home/gpucoder/myLiveEdgeDetection/myLiveEdgeDetection.elf'

Specify the runtime arguments to the application.

Example: 'camVid.avi'

Output Arguments

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The process ID of the application launched on the NVIDIA target.

Example: 12821

Version History

Introduced in R2019a

See Also

Functions

Objects

Topics