how cam start the trigger

Hi, please help me , how can I start trigger in these .m file? those it have specific syntax or somthing else . my matlab is r2012a and i attach my .m file.

Error using imaqdevice/trigger (line 49)
OBJ must be running before TRIGGER is used.

Error in start (line 101)
    trigger([vid1 , vid2]);

thanks for devote your time for me.

[Geoff Hayes]

mohamad - have you read through the working with triggers to see how to set a Manual Trigger (which may be what you are doing)? Do you have to configure the trigger type with

 triggerconfig(vidobj, 'manual')

?

[mohamad almasi]

hi geoff it's my appreciate to see you again in helping me, actually yes as you mentioned me I checked it but it seems doesn't can rescue me

[Geoff Hayes]

Unfortunately, I don't have the Image Acquisition Toolbox so cannot provide much more help. Perhaps someone more familiar with this toolbox will be able to.

Answer 1

[Scott Harris]

For those still looking, initialize the camera before trying to trigger it:

cam = videoinput('gentl', 1); %specify video object
triggerconfig(cam, 'manual'); %allow for manual frame triggering
start(cam) %initialize
trigger(cam); %trigger

Answer 2

[kingston lui]

HI,I met the same problem. Have you found out the solution?

Answer 3

[Taiem Hasan]

ii also have same error...if any 1 have the solution thn plz send it