Hi Dude,

controlling parallel port through MATLAB is quite simple.
Check below lines of MATLAB code which I am using in my project.

dio = digitalio('parallel','LPT1')
--> create an object

data1 = addline(dio,0:7,0,'out') %Pin 2-9
data2 = addline(dio,0,2,'out') %Pin 1
data3 = addline(dio,1,2,'out') %Pin 14
--> to configure parallel port line

Following command will output "0" to data1 of parallel port
putvalue(data1,0)

Don't hesitate to ask me if you have any queries.
;-)

hi bro..
I also making a robot and i still confiuse about that (the discussion above)..but i think my question is still in this scope..
is it the connection between computer and the robot is without wire??..
Hope anyone can explain detail...

thanks..

No. MATLAB code given above is to interface a peripheral (a device) via parallel port with the PC.

ok.. thanks for your explanation..

This thread was of great use for me thank u........

Hye i want to control a lift (I hav made my own mechanical structure).
Just give me a example of how to turn on/off 4-5 leds using parallel port through matlab plzzzzzzzzzzz

hi everyone
i also have this project where i only have to control 5 leds by MATLAB...
and i have to use my laptop to do it.

i have found some information about using serial-parallel ports and recently have a premade PIC circuit. but still i have so little time that i need your advices emergently...

thanks

this is done by using embeded programing and using infrared or radio wave signals and made a device to genrate perticular signals conect on 25 pin parlel port by using rs232 wier, but i want to conform you that is your robot is able to move on stayers by themself if yes please tel me how?

by

this is done by using embeded programing in c langwage and using infrared or radio wave signals and made a device to genrate perticular signals conect on 25 pin parlel port by using rs232 wier, but i want to conform you that is your robot is able to move on stayers by themself if yes please tel me how?

by

Check this out guys..
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Ms thesis

This is code for parallel interference cancelltion in ds cdma using matrix algebraic approach.
Please check the code and let me know if iam doin any mistake . Also I need to apply slow and fast rayleigh fading in this model.

The rcd signal is R = SAB + N
where R,S,A,B are matrices
The matlab code is given below :
close all
clear all;
clc;
warning off all

K = 27; %No. of users
Navg = 1e3; %No. of repititions
snr = 5:1:25; %SNR RANGE

Sv = (10.^(-snr/10)); %Noise variance in different SNR
A = eye(K); %input power
%Get signature sequences
load GS31;
S = GS31(1:K,;
S= S';
Lc = length(S😀,1));
Sn= S./sqrt(Lc); %Normalize energy of signature waveforms
R = Sn'*Sn; % Calculate correlation matrix

corr=(R-eye(size(R)));

h = waitbar(0,'WAIT...');
for t = 1:Navg
waitbar(t/Navg);
for j = 1:length(snr)
noise =(Sv(j))^.5*randn(Lc,1);
b=2*(randint(K,1)-0.5);
BT=Sn*A*b;
r=awgn(BT,snr(j));
% r=BT+noise;
y = Sn'*r;

ysdec = inv(R)*Sn'*r;

YMF = sign(y);
YDEC= sign(ysdec);
novector(1:K) = Sv(j);
sigma2= diag(novector);

t1=R+sigma2;
ysmmse = (inv ( t1 ))* y;
YMMSE= sign(ysmmse);

%%CPIC

yinit=zeros(K,1);
ypic1= (Sn'*r) + yinit ;
YPIC1 = sign(ypic1);

yinit2=ypic1;
ypic2=(Sn'*r) - ( corr*A*yinit2 );
YPIC2 = sign(ypic2);

yinit3=ypic2;
ypic3=(Sn'*r) - ( corr*A*yinit3 );
YPIC3 = sign(ypic3);


yinit4= ypic3;
ypic4=(Sn'*r) - ( corr*A*yinit4 );
YPIC4 = sign(ypic4);

yinit5= ypic4;
ypic5=(Sn'*r) - ( corr*A*yinit5 );
YPIC5 = sign(ypic5);


yinit6=ypic5;
ypic6=(Sn'*r) - ( corr*A*yinit6 );
YPIC6 = sign(ypic6);



yinit7=ypic6;
ypic7=(Sn'*r) - ( corr*A*yinit7 );
YPIC7 = sign(ypic7);


yinit8=ypic7;
ypic8=(Sn'*r) - ( corr*A*yinit8 );
YPIC8 = sign(ypic8);



ERMF(j)= length(find (YMF ~= b))/K;
ERDEC(j)= length(find (YDEC ~= b))/K;
ERMMSE(j)= length(find (YMMSE ~= b))/K;
ERPIC1(j)= length(find (YPIC1 ~= b))/K;
ERPIC2(j)= length(find (YPIC2 ~= b))/K;
ERPIC3(j)= length(find (YPIC3 ~= b))/K;
ERPIC4(j)= length(find (YPIC4 ~= b))/K;
ERPIC5(j)= length(find (YPIC5 ~= b))/K;
ERPIC6(j)= length(find (YPIC6 ~= b))/K;
ERPIC7(j)= length(find (YPIC7 ~= b))/K;
ERPIC8(j)= length(find (YPIC8 ~= b))/K;
end
EERMF(t,=ERMF;
EERDEC(t,=ERDEC;
EERMMSE(t,=ERMMSE;
EERPIC1(t,=ERPIC1;
EERPIC2(t,=ERPIC2;
EERPIC3(t,=ERPIC3;
EERPIC4(t,=ERPIC4;
EERPIC5(t,=ERPIC5;
EERPIC6(t,=ERPIC6;
EERPIC7(t,=ERPIC7;
EERPIC8(t,=ERPIC8;
end


BERMF = smooth(mean(EERMF,1));
BERDEC = smooth(mean(EERDEC,1));
BERMMSE = smooth(mean(EERMMSE,1));
BERPIC1 = smooth(mean(EERPIC1,1));
BERPIC2 = smooth(mean(EERPIC2,1));
BERPIC3 = smooth(mean(EERPIC3,1));
BERPIC4 = smooth(mean(EERPIC4,1));
BERPIC5 = smooth(mean(EERPIC5,1));
BERPIC6 = smooth(mean(EERPIC6,1));
BERPIC7 = smooth(mean(EERPIC7,1));
BERPIC8 = smooth(mean(EERPIC8,1));

semilogy(snr,BERMF,'k*-',snr,BERPIC1,'m^-',snr,BERPIC2,'rs-',snr,BERPIC3,'yo-',snr,BERPIC4,'k<-',snr,BERPIC5,'c^-',snr,BERPIC6,'y^-',snr,BERPIC7,'r>-',snr,BERPIC8,'bs-',snr,BERDEC,'g*-',snr,BERMMSE,'go-');
grid on
xlabel('SNR')
ylabel('Average BER')
legend('MF','Stage1','Stage2','Stage3','Stage4','Stage5','Stage6','Stage7','Stage8','DECOR','MMSE')
title('BER vs SNR--Conventional PIC-25 Users -AWGN Channel')
close(h)

Added after 1 minutes:

Dear all,

The : ) got replaced by a smiley.

I need urgent reply regarding fading
thanks in advance

raknahs2

Hi Dude,

controlling parallel port through MATLAB is quite simple.
Check below lines of MATLAB code which I am using in my project.

dio = digitalio('parallel','LPT1')
--> create an object

data1 = addline(dio,0:7,0,'out') %Pin 2-9
data2 = addline(dio,0,2,'out') %Pin 1
data3 = addline(dio,1,2,'out') %Pin 14
--> to configure parallel port line

Following command will output "0" to data1 of parallel port
putvalue(data1,0)

Don't hesitate to ask me if you have any queries.
;-)

Dear

I am working on an idea, i want to control the direction of DC motor(clockwise or anticlockwise)
using GUI and parallel port. I have made a GUI on MATLAB but don't know how to program its .m file
GUI figure is attached.



I have added two options
i- clockwise
ii-anticlockwise

I redefine the problem
" select any one of the direction and press 'ok'.
if selected ' clockwise' send 0 to pin2 of parallel port
if selected ' anticlockwise' send 1 to pin2 of parallel port

I am waiting for your reply

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The_Big_K

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