Matlab Coder Target - Example MATLAB function for edge detection.
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Hello
I am running a Matlab 2018 a with Linux Os ,
I have a raspberry PI 3 , and I would like to work with Matlab code target , so I tried the
example that is provided with the package it self .
the function is :
function myApplication()
%myApplication Example MATLAB function for edge detection.
%#codegen
% Copyright 2017-2018 The MathWorks, Inc.
w = matlab.raspi.webcam(0,[320,240]);
d = matlab.raspi.SDLVideoDisplay;
% Main loop
kern = [1 2 1; 0 0 0; -1 -2 -1];
for k = 1:1000
img = snapshot(w);
h = conv2(img(:,:,2),kern,'same');
v = conv2(img(:,:,2),kern','same');
e = sqrt(h.*h + v.*v);
edgeImg = uint8((e > 100) * 240);
displayImage(d,edgeImg);
end
release(w);
release(d);
end
after that I intialize the connection with PI and launching the application
r= raspi
r =
raspi with properties:
DeviceAddress: 'XXXXXXXXXX'
Port: XXXX
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-1'}
AvailableWebcams: {'DEF-299 Camera (usb-3f980000.usb-1.2):','DEF-299 Camera (usb-3f980000.usb-1.3):'}
I2CBusSpeed: 100000
Supported peripherals
>> runOnHardware(r,'myApplication')
Code generation successful: View report
but I got a black screen with the screen atached to PI , any Help please why I got the black screen and how I can solve this problem ?
Thank You very Much
the following link is for the package it self
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回答 (1 件)
Reeno Joseph
2020 年 5 月 21 日
Hello Abdelrahman,
I'm guessing you are using the MathWorks customized Raspbian image.
The video display is not showing up in the HDMI due to a bug in the SDL library. For more details please refer https://github.com/raspberrypi/firmware/issues/913
As a workaround, you can flash the SD card with a full version of Raspbian(with GUI) and customize it to work with MATLAB -- please follow the OS customization steps in the hardware setup screen.
I hope this helps.
Thanks,
Reeno Joseph
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