}
}
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;
}
}