Connecting Arducam OV9281

I'm connecting a pi 3 B to matlab running via wifi. I have ab Arducam OV9281 connected to the CSI port. The camera is running on my pi and verfied the device is connected to my CSI /dev/video0

I was able to stream from the camera directly from my pi terminal using yavta but I'd like to connect the camera to matlab. I can access the pi via matlab using r = raspi

DeviceAddress: '192.168.12.***'

Port: *****

BoardName: 'Raspberry Pi 3 Model B'

AvailableLEDs: {'led0'}

AvailableDigitalPins: [4,5,6,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]

AvailableSPIChannels: {'CE0','CE1'}

AvailableI2CBuses: {'i2c-0','i2c-1'}

AvailableWebcams: {'unicam (platform:3f801000.csi)'}

I2CBusSpeed: 100000

AvailableCANInterfaces: {}

But when I try to connect using webcame or cameraboard(r), no luck. Cameraboard states "Failed to detect a Camera Board connected to the Raspberry Pi hardware"

Answer 1

[Chetan]

Hello @John,

I understand that you are experiencing difficulties when attempting to connect an external camera using the CSI port.

To help you resolve this issue, I suggest following the steps provided below:

1. Ensure that you have enabled the legacy camera. Please note that non-legacy cameras are currently not supported.

To enable the legacy mode open Raspberry Pi terminal,

• execute the following command:

$ sudo raspi-config 

• Go to interface options and enable Legacy camera

Refer the following MathWorks Documentation for detail

• https://www.mathworks.com/hardware-support/system-requirements.html
• https://www.mathworks.com/hardware-support/matlab-webcam.html

2. In addition to the webcam workflow, you can utilize Raspberry Pi system commands to capture images in MATLAB. Here are a few commands you can try:

r = raspi;% Use system commands to capture images 
r.system('raspistill -o new.jpg'); 
% Get the captured image in MATLAB's current working directory 
r.getFile('/home/pi/new.jpg'); 
% Read the image in MATLAB 
img = imread('new.jpg'); 
imshow(img); 

You can also refer to the following link for information on using webcams in Raspberry Pi SPKG:

https://www.mathworks.com/hardware-support/matlab-webcam.html

I hope this helps.