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📁 ARM编程特别是系统初始化代码的编写中通常需要实现中断的响应、解析跳转和返回等操作
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class=3Dbold=20
      href=3D"http://www.chinavib.com/forum/profile-uid-52174.html"=20
      target=3D_blank>2204090</A> (=C0=EB=CF=DF) <BR><SPAN =
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        <TR>
          <TD vAlign=3Dtop><A=20
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id=3D34231&amp;pid=3D184286"=20
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alt=3D"=B2=E9=BF=B4=C6=C0=B7=D6=BC=C7=C2=BC"></A><SPAN =
class=3Dsmalltxt><SPAN=20
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></SPAN><BR><BR><SPAN=20
            style=3D"FONT-SIZE: =
13px">1.LMS=CB=E3=B7=A8=B5=C4=B7=C2=D5=E6=B3=CC=D0=F2=A3=BA<BR>%lms =
=CB=E3=B7=A8<BR>clear=20
            all<BR>close all<BR>hold =
off%=CF=B5=CD=B3=D0=C5=B5=C0=C8=A8=CA=FD<BR>sysorder =3D 5=20
            =
;%=B3=E9=CD=B7=CA=FD<BR>N=3D1000;%=D7=DC=B2=C9=D1=F9=B4=CE=CA=FD<BR>inp =
=3D randn(N,1);%=B2=FA=C9=FA=B8=DF=CB=B9=CB=E6=BB=FA=CF=B5=C1=D0<BR>n =
=3D=20
            randn(N,1);<BR>[b,a] =3D butter(2,0.25);<BR>Gz =3D=20
            tf(b,a,-1);%=C4=E6=B1=E4=BB=BB=BA=AF=CA=FD<BR>h=3D=20
            =
[0.0976;0.2873;0.3360;0.2210;0.0964;];%=D0=C5=B5=C0=CC=D8=D0=D4=CF=F2=C1=BF=
<BR>y =3D=20
            lsim(Gz,inp);%=BC=D3=C8=EB=D4=EB=C9=F9<BR>n =3D n * =
std(y)/(10*std(n));%=D4=EB=C9=F9=D0=C5=BA=C5<BR>d =3D y +=20
            =
n;%=C6=DA=CD=FB=CA=E4=B3=F6=D0=C5=BA=C5<BR>totallength=3Dsize(d,1);%=B2=BD=
=B3=A4<BR>N=3D60 ;=20
            =
%60=BD=DA=B5=E3=D7=F7=CE=AA=D1=B5=C1=B7=D0=F2=C1=D0<BR>%=CB=E3=B7=A8=B5=C4=
=BF=AA=CA=BC<BR>w =3D zeros ( sysorder , 1 ) ;%=B3=F5=CA=BC=BB=AF<BR>for =
n =3D=20
            sysorder : N <BR>u =3D inp(n:-1:n-sysorder+1) ;% =
u=B5=C4=BE=D8=D5=F3<BR>y(n)=3D w' *=20
            u;%=CF=B5=CD=B3=CA=E4=B3=F6<BR>e(n) =3D d(n) - y(n) =
;%=CE=F3=B2=EE<BR>if n &lt;=20
            20<BR>mu=3D0.32;<BR>else<BR>mu=3D0.15;<BR>end<BR>w =3D w + =
mu * u * e(n)=20
            ;%=B5=FC=B4=FA=B7=BD=B3=CC<BR>end =
<BR>%=BC=EC=D1=E9=BD=E1=B9=FB<BR>for n =3D N+1 : totallength<BR>u =3D=20
            inp(n:-1:n-sysorder+1) ;<BR>y(n) =3D w' * u ;<BR>e(n) =3D =
d(n) - y(n)=20
            ;%=CE=F3=B2=EE<BR>end <BR>hold =
on<BR>plot(d)<BR>plot(y,'r');<BR>title('=CF=B5=CD=B3=CA=E4=B3=F6')=20
            =
;<BR>xlabel('=D1=F9=B1=BE')<BR>ylabel('=CA=B5=BC=CA=CA=E4=B3=F6')<BR>figu=
re<BR>semilogy((abs(e)))=20
            ;% =
e=B5=C4=BE=F8=B6=D4=D6=B5=D7=F8=B1=EA<BR>title('=CE=F3=B2=EE=C7=FA=CF=DF'=
)=20
            =
;<BR>xlabel('=D1=F9=B1=BE')<BR>ylabel('=CE=F3=B2=EE=CA=B8=C1=BF')<BR>figu=
re%=D7=F7=CD=BC<BR>plot(h,=20
            'k+')<BR>hold on<BR>plot(w,=20
            =
'r*')<BR>legend('=CA=B5=BC=CA=C8=A8=CA=B8=C1=BF','=B9=C0=BC=C6=C8=A8=CA=B8=
=C1=BF')<BR>title('=B1=C8=BD=CF=CA=B5=BC=CA=BA=CD=B9=C0=BC=C6=C8=A8=CA=B8=
=C1=BF') ;<BR>axis([0=20
            6 0.05 =
0.35])<BR>2.NLMS=CB=E3=B7=A8=B5=C4=B7=C2=D5=E6=B3=CC=D0=F2=A3=BA<BR>%lms =
=CB=E3=B7=A8<BR>clear all<BR>close=20
            all<BR>hold =
off%=CF=B5=CD=B3=D0=C5=B5=C0=C8=A8=CA=FD<BR>sysorder =3D 5 =
;%=B3=E9=CD=B7=CA=FD<BR>N=3D1000;%=D7=DC=B2=C9=D1=F9=B4=CE=CA=FD<BR>inp=20
            =3D =
randn(N,1);%=B2=FA=C9=FA=B8=DF=CB=B9=CB=E6=BB=FA=CF=B5=C1=D0<BR>n =3D =
randn(N,1);<BR>[b,a] =3D=20
            butter(2,0.25);<BR>Gz =3D =
tf(b,a,-1);%=C4=E6=B1=E4=BB=BB=BA=AF=CA=FD<BR>h=3D=20
            =
[0.0976;0.2873;0.3360;0.2210;0.0964;];%=D0=C5=B5=C0=CC=D8=D0=D4=CF=F2=C1=BF=
<BR>y =3D=20
            lsim(Gz,inp);%=BC=D3=C8=EB=D4=EB=C9=F9<BR>n =3D n * =
std(y)/(10*std(n));%=D4=EB=C9=F9=D0=C5=BA=C5<BR>d =3D y +=20
            =
n;%=C6=DA=CD=FB=CA=E4=B3=F6=D0=C5=BA=C5<BR>totallength=3Dsize(d,1);%=B2=BD=
=B3=A4<BR>N=3D60 ;=20
            =
%60=BD=DA=B5=E3=D7=F7=CE=AA=D1=B5=C1=B7=D0=F2=C1=D0<BR>%=CB=E3=B7=A8=B5=C4=
=BF=AA=CA=BC<BR>w =3D zeros ( sysorder , 1 ) ;%=B3=F5=CA=BC=BB=AF<BR>for =
n =3D=20
            sysorder : N <BR>u =3D inp(n:-1:n-sysorder+1) ;% =
u=B5=C4=BE=D8=D5=F3<BR>y(n)=3D w' *=20
            =
u;%=CF=B5=CD=B3=CA=E4=B3=F6<BR>r(n)=3Du'*u;%=D7=D4=CF=E0=B9=D8=BE=D8=D5=F3=
<BR>e(n) =3D d(n) - y(n)=20
            =
;%=CE=F3=B2=EE<BR>fai=3D.0001;%=D0=DE=D5=FD=B2=CE=CA=FD=A3=AC=CE=AA=B7=C0=
=D6=B9u'*u=B9=FD=D0=A1=B5=BC=D6=C2=B2=BD=B3=A4=D6=B5=CC=AB=B4=F3=B6=F8=C9=
=E8=D6=C3=B5=C4<BR>if n &lt;=20
            20<BR>mu=3D0.32;<BR>else<BR>mu=3D0.15;<BR>end<BR>w =3D w + =
mu * u *=20
            e(n)/(r(n)+fai) ;;%=B5=FC=B4=FA=B7=BD=B3=CC<BR>end =
<BR>%=BC=EC=D1=E9=BD=E1=B9=FB<BR>for n =3D N+1 :=20
            totallength<BR>u =3D inp(n:-1:n-sysorder+1) ;<BR>y(n) =3D w' =
* u=20
            ;<BR>e(n) =3D d(n) - y(n) ;%=CE=F3=B2=EE<BR>end <BR>hold=20
            =
on<BR>plot(d)<BR>plot(y,'r');<BR>title('=CF=B5=CD=B3=CA=E4=B3=F6')=20
            =
;<BR>xlabel('=D1=F9=B1=BE')<BR>ylabel('=CA=B5=BC=CA=CA=E4=B3=F6')<BR>figu=
re<BR>semilogy((abs(e)))=20
            ;% =
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