1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
% DaqWaitButtonDumbTest1408FS.m
%
% A quick and dirty demo on how to poll the digital inputs
% of a USB-1408FS as fast as possible, without overhead.
%
% This is essentially a stripped down version of DaqDIn() with
% some polling loops wrapped around and a options.secs value of
% zero for essentially polling with no timeout.
%
daq = DaqFind;
reportId = 3;
TheReport = uint8(0);
NumberOfPorts = 2;
if IsWin
% Windows needs some minimal polling time:
options.secs = 0.001;
else
options.secs = 0.000;
end
PsychHID('ReceiveReportsStop',daq);
PsychHID('GiveMeReports',daq);
PsychHID('ReceiveReports',daq, options);
while 1
% Emit query to device:
PsychHID('SetReport',daq,2,reportId, TheReport);
% Wait for result from device:
inreport = [];
while isempty(inreport)
% Yield some minimum amount of time to other processes if you want to be
WaitSecs('YieldSecs', 0);
% New data available?
inreport = PsychHID('GetReport',daq,1,reportId,NumberOfPorts+1);
end
% inreport contains latest button query result: Button pressed?
if inreport(3) ~= 255
% yes: Done!
break;
end
% No. Repeat sampling...
end
fprintf('Change detected! Bye.\n');
|
