}

}

while(aa=='A')

{

lcd_disp( 0x90,"接收字母",9) ; lcd_disp( 0x94,&aa,1) ;

lcd_disp( 0x96,"直行",4) ;

P1= up;

rightled=0;

leftled=0;

if(moshi==1)

{

flag=2;

break;

} }

while(aa=='B')

{

lcd_disp( 0x90,"接收字母",9) ; lcd_disp( 0x94,&aa,1) ;

lcd_disp( 0x96,"后退",4) ;

P1= down;

rightled=0;

leftled=0;

beep=0;

if(moshi==1)

{

flag=2;

break;

}

}