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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 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | % Psychtoolbox/PsychHardware/Daq/
% The Daq Toolbox
% Control the USB-1208FS or USB-1608FS (see below) data acquisition device.
%
% The Daq Toolbox is a set of functions providing communication with
% a particular USB data acquisition device (daq): the USB-1208FS made by
% Measurement Computing (see URL below). This daq costs $150 and offers "50
% kHz" input and output 12-bit sampling of analog voltages (8 in, 2 out)
% and 16 digital i/o lines, with signals brought out to screw terminals.
% ("50 kHz" is a theoretical upper limit: as of 18 April 2005 we attain 2
% kHz. See DaqTest.) The USB-1208FS is the size of a wallet and is powered
% through its USB cable. We have complete control of it from within Matlab or,
% Octave via the PsychHID extension.
%
% There is a Daq M file (see DaqFunctions) for each USB-1208FS firmware
% command, plus a few more to facilitate use of the device.
%
% There is a near-perfect isolation of the dependency on platform and
% device at the two levels of code in the Daq Toolbox. The PsychHID MEX
% file (written in C) is highly dependent on the platform, but
% independent of the particular HID-compliant device. It provides generic
% HID commands. (HID, or Human Interface Device, is a USB class specifying
% a communication protocol for the device and host.) The Daq M files are
% specific to our HID-compliant device, the USB-1208FS, but independent of
% the platform, and would run unchanged in MATLAB or Octave on any other
% computer for which we provided the PsychHID extension. We hope that users
% of the Psychtoolbox will find it easy to write new MATLAB M files
% using PsychHID to support other HID-compliant devices, using the Daq
% Toolbox as a model.
%
% NOT RESPONDING? If PsychHID is not responding, e.g. after unplugging it
% and plugging it back in, try quitting and restarting MATLAB or Octave.
% We find that this reliably restores normal communication.
%
% LINUX: If you want to use these functions without the need to run
% Matlab or Octave as root user (i.e., without need for root login or the
% sudo command), you have to run the script PsychLinuxConfiguration once.
% This happens automatically during invocation of DownloadPsychtoolbox,
% UpdatePsychtoolbox, or SetupPsychtoolbox, but if you didn't install
% Psychtoolbox by one of these means, you'll need to run it manually.
% Then after unplugging and replugging your device, non-root access should
% work.
%
% Denis Pelli, 30 April 2005.
%
% From November 2007 through January 2008, the functions in this toolbox
% were tested with a USB-1608FS. There are significant hardware
% differences between the two devices, notably one Digital I/O port vs. two
% and no analog output ports in the 1608. Nevertheless, most of the
% command codes are the same, so the two devices can share a lot of common
% software. The USB-1608FS was connected to a Mac Pro running Leopard for
% most tests (some tests also run with Tiger; no significant performance
% differences were found in those cases). If you have a 1608 and have
% trouble running any of the code here, you might try e-mailing
% MickeyPRowe@gmail.com.
%
% Mickey P. Rowe, 10 January 2008.
%
% From August 2011 on, these functions should also work on MS-Windows and
% GNU/Linux, due to the availability of PsychHID for these platforms.
%
% Mario Kleiner, 15 August 2011.
%
%
% web http://www.measurementcomputing.com/cbicatalog/directory.asp?dept_id=403 -browser;
% web http://psychtoolbox.org/daq.html -browser;
% See also: DaqFunctions, DaqTest, PsychHIDTest, PsychHID,
% PsychHardware, DaqPins, DaqCalls, DaqCodes,
% DaqDeviceIndex, DaqFind, DaqDIn, DaqDOut, DaqAIn, DaqAOut, DaqAInScan, DaqAOutScan.
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