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  • Committer: Package Import Robot
  • Author(s): Yaroslav Halchenko
  • Date: 2013-11-19 23:34:50 UTC
  • mfrom: (3.1.4 experimental)
  • Revision ID: package-import@ubuntu.com-20131119233450-f7nf92vb8qavjmk8
Tags: 3.0.11.20131017.dfsg1-3
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Psychtoolbox/PsychHardware/Daq/DaqWaitButtonDumbTest1408FS.m
 
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% DaqWaitButtonDumbTest1408FS.m
 
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%
 
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% A quick and dirty demo on how to poll the digital inputs
 
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% of a USB-1408FS as fast as possible, without overhead.
 
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%
 
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% This is essentially a stripped down version of DaqDIn() with
 
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% some polling loops wrapped around and a options.secs value of
 
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% zero for essentially polling with no timeout.
 
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%
 
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daq = DaqFind;
 
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reportId = 3;
 
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TheReport = uint8(0);
 
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NumberOfPorts = 2;
 
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if IsWin
 
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 % Windows needs some minimal polling time:
 
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 options.secs = 0.001;
 
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else
 
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 options.secs = 0.000;
 
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end
 
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PsychHID('ReceiveReportsStop',daq);
 
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PsychHID('GiveMeReports',daq);
 
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PsychHID('ReceiveReports',daq, options);
 
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while 1
 
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% Emit query to device:
 
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PsychHID('SetReport',daq,2,reportId, TheReport);
 
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% Wait for result from device:
 
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inreport = [];
 
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while isempty(inreport)
 
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% Yield some minimum amount of time to other processes if you want to be
 
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WaitSecs('YieldSecs', 0);
 
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% New data available?
 
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inreport = PsychHID('GetReport',daq,1,reportId,NumberOfPorts+1);
 
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end
 
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% inreport contains latest button query result: Button pressed?
 
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if inreport(3) ~= 255
 
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% yes: Done!
 
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break;
 
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end
 
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% No. Repeat sampling...
 
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end
 
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fprintf('Change detected! Bye.\n');