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From: Monah on 16 Jun 2010 04:36
Hi,
I am new to simulink and embedded matlab function, I am trying to create a block which I will connect it to another block, so I should have an output of it...
the first version of my block is like that:
function y=questionI1(vals)
%#eml

eml.extrinsic('bit_gen');
eml.extrinsic('view_data');
eml.extrinsic('stem');
eml.extrinsic('AXIS');
eml.extrinsic('title');
eml.extrinsic('sgnl_prm_gen');
eml.extrinsic('bit2int');
eml.extrinsic('int2symb');
eml.extrinsic('pam_encoding');
eml.extrinsic('plot');
eml.extrinsic('figure');
eml.extrinsic('rec_filt_dsmp');
eml.extrinsic('eye_diag');
eml.extrinsic('hold on');
eml.extrinsic('ML_decision');
eml.extrinsic('int2bit');

%Assigning of entry values
p0=vals(1,1);
A=vals(1,2);
sf_b=vals(1,3);
nbits=vals(1,4);
M=vals(1,5);

%Generate random bits
bit_vec = bit_gen(nbits,p0);

%Display 5 element binary sequence
% view_data(bit_vec,100,5,'samp',vals(1,3),'Binary sequence');
% plot([100:104],bit_vec(1,[100:104]));


% bit_vec=bit_vec(1,100:104);
figure(1);
stem(bit_vec);
AXIS ([99.5 104.5 0 1.2]);
title('Binary sequence');


% Generate a modulated signal vector
[ak,h,sf] = sgnl_prm_gen('ASK',M,'NRZ',sf_b);
int_vec = bit2int(bit_vec,M);
symb_vec=int2symb(int_vec,ak);
pam_vec = pam_encoding(symb_vec,A,h,sf);


% Display 5 element NRZ coded sequence
% view_data(pam_vec,100,5,'symb',sf,'NRZ coded sequence');
figure(2);
plot(pam_vec);
AXIS ([99.5 104.5 -1.2 1.2]);
title('NRZ coded sequence');
%
%

% Filter and down-sample
[rec_vec,filter_out]=rec_filt_dsmp(pam_vec,fliplr(h),sf);
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % Display eye diagram
% figure(3)
% plot(filter_out);
% AXIS ([89 120 -4 4]);
% title('NZR code eye diagram');
% eye_diag(filter_out,100,3,sf,100,'NZR code eye diagram');
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%Take a decision
rint_vec = ML_decision(rec_vec,A,h,fliplr(h),ak);
rbit_vec = int2bit(rint_vec,M);

figure(4)
stem(rbit_vec,'filled');
AXIS ([99.5 104.5 0 1.2]);
title('Retrieved binary sequence');
% view_data(rbit_vec,100,5,'samp',sf,'Retrieved binary sequence');


y=bit_vec;

I really need to have this bit_vec that I create on output, but everytime i run it a problem occurs saying
Function output 'y' cannot be of MATLAB type.
could anyone have experienced this problem before?? I really need to get this bit_vec on output.
thank you.
Monah
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