//SDBLK_c Scicos discret Sigma Delta modulator //Classical interface function ver1.0 - scilab-4.1 //22 mars 2006 - INRIA - Author : A.Layec function [x,y,typ]=SDBLK_c(job,arg1,arg2) x=[];y=[];typ=[] select job case 'plot' then standard_draw(arg1) case 'getinputs' then [x,y,typ]=standard_inputs(arg1) case 'getoutputs' then [x,y,typ]=standard_outputs(arg1) case 'getorigin' then [x,y]=standard_origin(arg1) case 'set' then x=arg1; graphics=arg1.graphics;model=arg1.model; exprs=graphics.exprs; while %t do [ok,Nu,gain,m_order,typ_out,e_q,herit,exprs]=getvalue(['Sigma Delta modulator'],.. ['Size of inputs';'Amplitude of input modulator';... 'Order of modulator(1,2 or 3)';'Type of output(0:Regular/-1;1:Scaled)';... 'Enable Quantization error output?(0:No/1:Yes)';'Inherit (no:0, yes:1)'],... list('vec',1,'vec',1,'vec',1,'vec',1,'vec',1,'vec',1),exprs); if ~ok then break,end; if ok then if herit==1 then model.dep_ut=[%t %f] if e_q==1 [model,graphics,ok]=check_io(model,graphics,[Nu],[Nu;Nu],[],[]) model.evtin=[] model.in=[Nu] model.out=[Nu;Nu] else [model,graphics,ok]=check_io(model,graphics,[Nu],[Nu],[],[]) model.evtin=[] model.in=[Nu] model.out=[Nu] end else model.dep_ut=[%t %f] if e_q==1 [model,graphics,ok]=check_io(model,graphics,[Nu],[Nu;Nu],1,[]) model.evtin=1 model.in=[Nu] model.out=[Nu;Nu] else [model,graphics,ok]=check_io(model,graphics,[Nu],[Nu],1,[]) model.evtin=1 model.in=[Nu] model.out=[Nu] end end if e_q==1 then model.ipar(1)=1 else model.ipar(1)=0 end if (m_order==1)|(m_order==2)|(m_order==3) then if(m_order==1) then model.ipar(2)=m_order model.dstate=[0;0] elseif(m_order==2) then model.ipar(2)=m_order model.dstate=[0;0;0;0;0] elseif(m_order==3) then model.ipar(2)=m_order model.dstate=[0;0;0;0;0;0;0;0;0] end else model.ipar(2)=1 model.dstate=[0;0] end if(typ_out==0)|(typ_out==1)|(typ_out==-1) then model.ipar(3)=typ_out else model.ipar(3)=0 end if model.ipar(2)==1 then graphics.gr_i(1)(7)='txt=[''1st order'']'; elseif model.ipar(2)==2 then graphics.gr_i(1)(7)='txt=[''2nd order'']'; elseif model.ipar(2)==3 then graphics.gr_i(1)(7)='txt=[''3rd order'']'; end graphics.exprs=exprs model.rpar=gain(:) x.graphics=graphics; x.model=model; break; end end case 'define' then Nu=1 gain=1 m_order=1 typ_out=0 e_q=0 herit=0 model=scicos_model() model.sim=list('sdblk',4) model.in=Nu model.out=Nu model.evtin=1 model.evtout=[] model.dstate=[0;0] model.rpar=gain model.ipar=[] model.blocktype='d' model.firing=[] model.dep_ut=[%t %f] gr_i=['thick=xget(''thickness'')'; 'xset(''thickness'',2)'; 'pat=xget(''pattern'')'; 'fnt=xget(''font'')'; 'xpoly(orig(1)+[0.45;0.1;0.3;0.1;0.45]*sz(1),orig(2)+[0.75;0.75;0.5;0.25;0.25]*sz(2),""lines"")'; 'xpoly(orig(1)+[0.725;0.55;0.9;0.725]*sz(1),orig(2)+[0.75;0.25;0.25;0.75]*sz(2),""lines"")'; 'txt=''1st order'';' 'style=5;' 'rectstr=stringbox(txt,orig(1),orig(2),0,style,1);' 'w=(rectstr(1,3)-rectstr(1,2))*%zoom;' 'h=(rectstr(2,2)-rectstr(2,4))*%zoom;' 'xstringb(orig(1)+sz(1)/2-w/2,orig(2)-h-4,txt,w,h,''fill'');' 'e=gce();' 'e.font_style=style;' 'xset(''thickness'',thick)'; 'xset(''pattern'',pat)'; 'xset(''font'',fnt(1),fnt(2))'] exprs=[sci2exp(Nu),sci2exp(gain),... sci2exp(m_order),sci2exp(typ_out),... sci2exp(e_q),sci2exp(herit)]; x=standard_define([2.5 2],model,exprs,gr_i) end endfunction