function structure = cbg2ese(system_name, system_type, system_cr, ...
system_args, full_name, full_name_repetition, ...
repetition,...
structure, structure_file, infofile)
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function cbg2ese.m
% Acausal bond graph to causal bond graph: mfile format
% Structure matrix [states,nonstates,inputs,outputs,zero_outputs]
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.12 1997/04/15 09:17:26 peterg
% %% Added the structure file - contains details of states etc.
% %%
% %% Revision 1.11 1996/12/07 18:20:11 peterg
% %% Replaces null argument by a default and tells user.
% %%
% %% Revision 1.10 1996/12/07 17:37:07 peterg
% %% Now handles numbered SS ports appearing at top level.
% %%
% %% Revision 1.9 1996/12/04 21:49:47 peterg
% %% Compares full-name with empty string (instead of testing for zero
% %% length)
% %%
% %% Revision 1.8 1996/08/30 16:36:08 peter
% %% More info written to ese files.
% %%
% %% Revision 1.7 1996/08/30 11:23:13 peter
% %% Argument substitution implemented.
% %%
% %% Revision 1.6 1996/08/27 08:04:52 peterg
% %% Handles complex components and repetative components.
% %%
% %% Revision 1.5 1996/08/24 15:02:23 peter
% %% Writes `END;' to keep reduce happy.
% %%
% %% Revision 1.4 1996/08/19 09:03:41 peter
% %% Handles repeating components.
% %%
% %% Revision 1.3 1996/08/18 20:08:02 peter
% %% Included additional structure: structure(5) = zero_outputs.
% %%
% %% Revision 1.2 1996/08/08 18:08:11 peter
% %% Sorted out file naming sceme
% %%
% %% Revision 1.1 1996/08/08 15:53:23 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
system_name, system_type, full_name,
pc = '%';
% Set up the names corresponding to the structure matrix.
structure_name = [
'state ',
'nonstate ',
'input ',
'output ',
'zero_output '];
% Are we at the top level of the heirarchy?
at_top_level = strcmp(full_name, '');
% Create the (full) system name
if at_top_level
full_name = system_name;
full_name_repetition = system_name;
system_type = system_name;
else
full_name = [full_name, '_', system_name];
full_name_repetition = [full_name_repetition, ...
'_', system_name, '_', num2str(repetition)];
end;
% $$$ full_name_type = [full_name, '_', system_type];
% $$$ cbg_name = [full_name_type, '_cbg'];
cbg_name = [full_name, '_cbg'];
% Return if cbg file doesn't exist
if exist(cbg_name)~=2
disp([cbg_name, ' does not exist']);
return
end;
% Setup files
ese_name = [full_name_repetition, '_ese.r'];
ese_file = fopen(ese_name, 'w');
fprintf(ese_file, '\n%s%s Equation file for system %s (file %s)\n', ...
pc, pc, full_name_repetition, ese_name);
fprintf(ese_file, '%s%s Generated by MTT\n\n', pc, pc);
% Evaluate the system function to get the bonds
eval(['[bonds,status,system_type] = ', cbg_name, ';']);
abg_name = [system_type, '_abg'];
cmp_name = [system_type, '_cmp'];
eval(['[junk,components]=', abg_name, ';']);
% Find number of bonds
[n_bonds,columns] = size(bonds);
if (columns ~= 2)&(n_bonds>0)
error('Incorrect bonds matrix: must have 2 columns');
end;
% Find number of components
[n_components,columns] = size(components);
n_components = n_components
% Set up the first dummy bond number - needed for repetative components
next_bond = max(max(abs(components)))+1;
for i = 1:n_components
comp = nozeros(components(i,:));
bond_list = abs(comp);
direction = sign(comp)'*[1 1];
% Convert from arrow orientated to component orientated causality
comp_bonds = bonds(bond_list,:).*direction;
% Get the component details
eval([ '[comp_type,comp_name,cr,args,repetitions] = ', cmp_name, '(i);' ...
]);
% Substitute positional ($1 etc) arguments
cr = subs_arg(cr,system_cr, ...
'lin',full_name,comp_type,comp_name,infofile);
args = subs_arg(args,system_args, ...
'1',full_name,comp_type,comp_name, infofile);
% change name of 0 and 1 components -- matlab doesn't like numbers here
if strcmp(comp_type,'0')
comp_type = 'zero';
end;
if strcmp(comp_type,'1')
comp_type = 'one';
end;
comp_type = comp_type
ports = length(bond_list)
repetitions = repetitions
if repetitions>1
port_pairs = ports/2;
if round(port_pairs)~=port_pairs;
mtt_info(['Repeated component ', comp_name, ...
' has an odd number of ports - ignoring repetitions']);
repetitions = 1;
end;
end;
if repetitions>1
odd_bonds = bond_list(1:2:ports-1);
even_bonds = bond_list(2:2:ports);
end;
for k = 1:repetitions
if repetitions>1
if k==1
bond_list(1:2:ports-1) = odd_bonds;
else
bond_list(1:2:ports-1) = bond_list(2:2:ports);
end;
if k==repetitions
bond_list(2:2:ports) = even_bonds;
else
new_bonds = [next_bond:next_bond+port_pairs-1];
next_bond = next_bond+port_pairs;
bond_list(2:2:ports) = new_bonds;
end;
end;
% Invoke the appropriate equation-generating procedure
name_r = full_name_repetition;
eqn_name = [comp_type, '_eqn']
if exist(eqn_name)~=2 % Try a compound component
disp('---PUSH---');
structure = cbg2ese(comp_name, comp_type, cr, args, ...
full_name, full_name_repetition, ...
k, structure, structure_file, infofile);
% Link up the bonds
fprintf(ese_file, ...
'\n\t%s Equations linking up subsystem %s (%s)\n\n', ...
pc, comp_name, comp_type);
name_comp_name = sprintf('%s_%s_%d', ...
full_name_repetition, comp_name, k);
for port_number=1:length(bond_list)
% Effort
if comp_bonds(port_number,1)==1 % Source
fprintf(ese_file, '%s_MTTu%d := %s;\n', ...
name_comp_name, port_number, varname(name_r, ...
bond_list(port_number),1));
else % sensor
fprintf(ese_file, '%s := %s_MTTy%d;\n', ...
varname(name_r, ...
bond_list(port_number),1), name_comp_name, port_number);
end;
% flow
if comp_bonds(port_number,2)==-1 % Source
fprintf(ese_file, '%s_MTTu%d := %s;\n', ...
name_comp_name, port_number, varname(name_r, ...
bond_list(port_number),-1));
else % sensor
fprintf(ese_file, '%s := %s_MTTy%d;\n', ...
varname(name_r, ...
bond_list(port_number),-1), name_comp_name, port_number);
end;
end;
disp('---POP---');
else % its a simple component
fprintf(ese_file, '\n\t%s Equations for component %s (%s), repetition %d\n\n', ...
pc, comp_name, comp_type,k);
% Take port SS to be ordinary SS at top level
if at_top_level & strcmp(comp_type, 'SS')
effort_attribute = cr;
flow_attribute = args;
if strcmp(effort_attribute, 'MTT_port') % Its a numbered port
effort_attribute = 'external';
flow_attribute = 'external';
cr = effort_attribute;
args = flow_attribute;
end;
end;
% Save the current structure
old_structure = structure;
% Generate the simple component equations
eval(['structure = ', ...
eqn_name, ...
'(name_r,bond_list,comp_bonds, ...
direction,cr,args,structure,ese_file);' ]);
% If structure has changed, write info to structure file.
structure_change = structure-old_structure;
% The following line is to avoid probs with multiport C or I
% it needs changing to handle multi ports correctly
structure_changes = sum(structure_change);
structure_change = structure_change>zeros(size(structure_change));
if structure_changes>0
which_indices = getindex(structure_change,1);
which_indices = which_indices(:,2)';
for which_index=which_indices
value = structure(which_index);
fprintf(structure_file, ...
'%s\t%1.0f\t%s\t%s\t%1.0f\n', ...
structure_name(which_index,:), value, ...
comp_name, full_name, repetition);
end;
end;
end;
end;
end;
% Close the files
fclose(ese_file);