[FieldTrip] signal acquisition with Biosemi
Sophie ADAMA
adama.sophie at gmail.com
Thu Feb 9 20:37:09 CET 2012
Hi,
Thanks for your response.
I tried that but I get this: *command not found*. I am using Mac OS Lion.
Any suggestions?
Thanks
Sophie
Le 09.02.12 17:56, Robert Oostenveld a écrit :
> On behalf of Philip...
>
>
> On 9 Feb 2012, at 15:31, Philip van den Broek wrote:
>
>> Dear Sophie and Hamza,
>>
>> The connection between the Biosemi Active2 system and the FieldTrip
>> buffer is handled by interfacing software biosemi2ft (part of
>> fieldtrip), and should be started from the terminal (mac) or command
>> prompt (windows).
>>
>> The interfacing software is located in the FieldTrip folder:
>> ../fieldtrip/realtime/acquisition/biosemi/biosemi2ft
>>
>> The BioSemi system needs a configuration (.cfg) file in which some
>> acquisition-related settings are specified. Configuration files for
>> the BioSemi system specify for example from how many channels data
>> should be streamed and/or recorded, and whether the data should be
>> downsampled. For more information about configuration files for
>> different acquisition systems, see the Fieldtrip website
>> <http://fieldtrip.fcdonders.nl/development/realtime/biosemi>.
>>
>> To start the buffer that connects to the Biosemi Active2, open the
>> terminal (Mac) or command prompt (PC) and in the folder where you
>> would like to save your data execute (change path according to your
>> system and location of fieldtrip toolbox):
>>
>> ../fieldtrip/realtime/acquisition/biosemi/biosemi2ft<config_file> <gdf-file> <hostname> <port>
>>
>> <config_file>: configuration file
>> <gdf-file>: base name of the gdf file. The suffix .gdf and session counters will be added automatically.
>> <hostname>: optional, default is 'localhost', specify '-' to spawn a local buffer (recommended)
>> <port>: optional, default is 1972
>> an example:
>> ../fieldtrip/realtime/acquisition/biosemi/biosemi2ft myconfig.cfg myfile - 1972
>>
>> Note that the manually specified name of the file will overwrite any
>> existing file, so make sure myfile.gdf doesn't exist.
>>
>> Once this is running, you get access to the data through the
>> fieldtrip buffer filled with data by biosemi2ft, i.e., fieldtrip
>> fileio functions give you access to the data:
>> ft_read_header('buffer://localhost:1972'
>> <buffer://localhost:1972%27>), or
>> ft_read_data('buffer://localhost:1972','begsample',1,'endsample',100
>> <buffer://localhost:1972%27,%27begsample%27,1,%27endsample%27,100>,........
>> For further information, see fieldtrip website.
>>
>> (more info on how we use the system at our department can be found
>> here:
>> http://www.nici.ru.nl/brainstream/twiki/bin/view/BrainStreamDocs/DocsSectionsInstallation)
>>
>> Hope this helps you to get things running in your place. If you have
>> any further questions, just let me know.
>>
>> Best regards,
>>
>>
>> Philip van den Broek
>> Radboud University Nijmegen
>> Donders Institute for Brain, Cognition and Behaviour
>> Centre for Cognition
>>
>> P.O. Box 9104, 6500 HE Nijmegen
>> Montessorilaan 3, 6525 HR Nijmegen
>> The Netherlands
>
>
>
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