/usr/share/psychtoolbox-3/PsychHardware/BitsPlusToolbox/BitsPlusDIO2Matrix.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o644.
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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 | function encodedDIOdata = BitsPlusDIO2Matrix(mask, data, command)
% encodedDIOdata = BitsPlusDIO2Matrix(mask, data, command);
%
% Generates a Matlab matrix containing the magic code and data
% required to set the DIO port of CRS Bits++ box in Bits++ mode.
%
% 'mask', 'data', and 'command' have the same meaning as in the function
% 'bitsEncodeDIO.m'.
%
% This is a helper function, called by bitsEncodeDIO and
% BitsPlusDIO2Texture, as well as from BitsPlusPlus when used with the
% imaging pipeline. It takes parameters for controlling Bits++ DIO and
% generates the data matrix for the corresponding T-Lock control code. This
% matrix is then used by the respective calling routines to convert it into
% a texture, a framebuffer image, or whatever is appropriate.
%
% This is just to unify the actual T-Lock encoding process in one file, so
% we don't have to edit or fix multiple files if something changes...
%
% History:
% 12/10/2007 Written, derived from BitsPlusDIO2Texture. (MK)
% 06/02/2008 Fix handling of LSB of 'mask': bitand(mask,255) was missing,
% which would cause wrong result if mask > 255. (MK)
if nargin ~= 3
error('Usage: encodedDIOdata = BitsPlusDIO2Matrix(mask, data, command)');
end
% Prepare the data array.
encodedDIOdata = uint8(zeros(1, 508, 3));
% Putting the unlock code for DVI Data Packet
encodedDIOdata(1,1:8,1:3) = ...
uint8([69 40 19 119 52 233 41 183; ...
33 230 190 84 12 108 201 124; ...
56 208 102 207 192 172 80 221])';
% Length of a packet - it could be changed
encodedDIOdata(1,9,3) = uint8(249); % length of data packet = number + 1
% Command - data packet
encodedDIOdata(1,10,3) = uint8(2); % this is a command from the digital output group
encodedDIOdata(1,10,2) = uint8(command); % command code
encodedDIOdata(1,10,1) = uint8(6); % address
% DIO output mask
encodedDIOdata(1,12,3) = uint8(bitand(mask, 255)); % LSB DIO Mask data - Modified by MK, added bitand()!
encodedDIOdata(1,12,2) = uint8(bitshift(mask, -8)); % MSB DIO Mask data
encodedDIOdata(1,12,1) = uint8(7); % address
% vectorised
encodedDIOdata(1,14:2:508,3) = uint8(bitand(data, 255));
encodedDIOdata(1,14:2:508,2) = uint8(bitshift(bitand(data, 768), -8));
encodedDIOdata(1,14:2:508,1) = uint8(8:255);
return;
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