Hi, I am trying to make MATLAB capture an image upon received a character 'c' at serial port. The following is my coding
vid = videoinput('winvideo', 1);
preview(vid);
s = serial('COM12');
while(w ~='c')
fopen(s)
a=1
w = fread(s) ;
a=2
fclose(s)
end
Image = getsnapshot(vid);
imagesc(Image)
closepreview(vid)
delete(vid);
I've tried without using the while loop, using an if statement instead before the getsnapshot, but the execution continue to getsnapshot when the fread timeout and fail (because 'c' not yet received at serial port). Therefore i try to add the while loop, but the result turn out the same. execution step out from while loop even before the condition (w==c) is met.
I tried out seeting the timeout of serial port, but instead of doing what i expected, the capture of image delayed, even when 'c' is sent to serial port.
Anyone here give suggestion on how i can change my code to function as what i desire?
