[FieldTrip] Problem detecting triggers with real time synchronous analysis

[Boris Reuderink]

Dear Adam,

I took a look at the code for ft_realtime_synchronous, and I have to
say I can't see why it should not work with the config you provided. I
would like to localize the problem; specifically, I would like to know
if it 1) occurs before the data is put in the buffer (i.e.
biosemi2ft), or 2) after it is read from the buffer --- assuming it
does not happen in the buffer.

Could perhaps send me output of biosemi2ft containing the messages
regarding the triggers? Even better would be file-dump of the buffer
using http://fieldtrip.fcdonders.nl/development/realtime#recording_and_playing_back_online_experiments
.

@Marcel, is appears you wrote ft_realtime_synchronous. Do you have any clue?

Best regards,

Boris

On Tue, Dec 20, 2011 at 4:54 AM, Adam C. Snyder <adam at adamcsnyder.com> wrote:
> Hello,
>     I'm trying to perform a real time synchronous analysis in response to a particular trigger, but it isn't working. Here are some brief details of the setup: we're using BioSemi ActiveTwo, a December 2011 version of FieldTrip and MATLAB 2010b.
>     I've managed to get the biosemi2ft executable running, and if I send a trigger through the BioSemi system, the details are noted in the command window. However, within the ft_realtime_synchronous function, the trigger events are not being found. The built-in status updates (e.g., "CMS_IN_RANGE", etc.), in contrast, are picked up by the ft_read_event call within ft_realtime_synchronous function, which adds to my confusion.
>     My configurations are something like these:
>
>          cfg.dataset = 'buffer://localhost:1972';
>          cfg.bcifun = @hello_world;
>          cfg.blocksize = 1;
>          cfg.trigger = [4 2];
>          cfg.jumptoeof = 'yes';
>          cfg.bufferdata = 'last'; %maybe the name of this option was different -- I'm typing from memory
>
>     I hope someone can kindly help me to figure this out, and thank you in advance for whatever help you can provide.
>
> In Science,
>
> Adam C. Snyder
>
> Postdoctoral Fellow
> Cognitive Neurophysiology Lab
> Albert Einstein College of Medicine
> Bronx, NY
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