You can copy a file, such as .profile, from the
Raspberry Pi hardware to the MATLAB Current Folder on your host computer. In MATLAB
Online™, the Current Folder is your MATLAB
Drive™ folder.
getFile(mypi,'/home/pi/.profile')
Download Files to a Folder on Your Computer or on MATLABDrive
You can use a wildcard to copy any matching file or files from the
Raspberry Pi hardware to your host computer. In MATLAB
Online, the folder you copy files to is located in your MATLAB
Drive folder. You can specify the path of a destination folder. The
folder must exist.
Copy the file from /home/pi/ and save it to
Desktop.
In MATLAB
Online, copy the file from /home/mwuser/ and save
it to myfolder in MATLAB
Drive.
getFile(mypi,'/home/mwuser/*.png','myfolder')
Download Files to MATLABDrive in MATLABOnline
You can copy a file from the Raspberry Pi hardware to your MATLAB
Drive folder when connected to it from MATLAB
Online. To use your hardware from MATLAB
Online, follow the instructions in Connect to Raspberry Pi Hardware Board in MATLAB Online.
When connected to your hardware from MATLAB
Online, the default working directory is
/home/matlabrpi, instead of
/home/pi. Copy a file from this folder to your
MATLAB
Drive folder. Your MATLAB
Drive folder is the default startup folder in MATLAB
Online. View its contents by clicking the Current Folder tab on the
left side of the Command Window.
getFile(mypi,'myvideo.h264')
You can also copy files from other folders on your hardware to MATLAB
Drive. List the files in /home/pi.
system(mypi,'ls /home/pi')
ans =
'cap.jpg
debug.log
Desktop
Documents
Downloads
matlab_online_login.expect
matlab-rpi.deb
Music
Pictures
Public
python_games
Templates
Videos'
Copy cap.jpg from /home/pi to
MATLAB
Drive.
getFile(mypi,'/home/pi/cap.jpg')
You can also specify the destination folder in MATLAB
Drive. The destination folder must already exist in your MATLAB
Drive. Copy myvideo.h264 from
/home/matlabrpi to myfolder in
MATLAB
Drive.
getFile(mypi,'myvideo.h264','myfolder')
Use the Camera Board
You can connect to the camera board from the MATLAB software, take a photograph, and record video.
Create a connection from the MATLAB software to the Raspberry Pi hardware.
mypi = raspi
Create a connection, mycam, from the MATLAB software to the camera board, and set the image resolution. The connection
displays the camera board properties.
mycam = cameraboard(mypi,'Resolution','1280x720')
mycam =
Cameraboard with Properties:
Name: Camera Board
Resolution: '1280x720' (View available resolutions)
Quality: 10 (1 to 100)
Rotation: 0 (0, 90, 180 or 270)
HorizontalFlip: 0
VerticalFlip: 0
FrameRate: 30 (2 to 30)
Recording: 0
Picture Settings
Brightness: 50 (0 to 100)
Contrast: 0 (-100 to 100)
Saturation: 0 (-100 to 100)
Sharpness: 0 (-100 to 100)
Exposure and AWB
ExposureMode: 'auto' (View available exposure modes)
ExposureCompensation: 0 (-10 to 10)
AWBMode: 'auto' (View available AWB modes)
MeteringMode: 'average' (View available metering modes)
Effects
ImageEffect: 'none' (View available image effects)
VideoStabilization: 'off'
ROI: [0.00 0.00 1.00 1.00] (0.0 to 1.0 [top, left, width, height])
Import and display a sequence of 10 snapshots on your computer.
for ii = 1:10
img = snapshot(mycam)
imagesc(img)
drawnow
end
If the image is upside down, change its orientation.
mycam.Rotation = 180
You can use the same approach to change the values of other cameraboard
properties.
Record a 60 second video.
record(mycam,'myvideo.h264',60)
Stop the recording immediately.
stop(mycam)
Copy the video from the board to your computer.
getFile(mypi,'myvideo.h264','C:\MATLAB ')
Delete the video file from the hardware to free up space.
mypi — Connection to specific Raspberry Pi hardware board raspi object
Connection to a specific Raspberry Pi hardware board, specified
as a raspi object.
source — Path and name of file on Raspberry Pi hardware path and name file name
Path and file name on the Raspberry Pi hardware, specified as a string. You can use either the
absolute path from the root folder, or the relative path from the present
working folder. Use Linux® path and file naming conventions. The default path is
/home/pi/. In MATLAB
Online, the default path is
/home/matlabrpi/.
Example: '.profile'
Example: '/home/pi/.profile'
Example: '/home/pi/.pro*'
Data Types: char
destination — Path and name of file on host computer MATLAB Current Folder (default) | destination path
Path and name of file on host computer, specified as a string. If not specified,
getFile uses the MATLAB Current Folder and the current file name. Use the naming
conventions of the operating system on the host computer. This function does
not create new folders. Folders in the path must exist. In MATLAB
Online, this path must be located in MATLAB
Drive. Optional.
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