/*循迹*/
if (L_XJ !=0&&R_XJ ==0)
{
DUTY1=50; /*调整占空比*/
DUTY2=50;
right(); /*右转*/
}
else if (R_XJ !=0&&L_XJ ==0)
{
DUTY1=80;
DUTY2=80;
left(); /*左转*/
}
else if((L_XJ !=0)&&R_XJ !=0)
{
DUTY1=30;
DUTY2=30;
forward(); /*前进*/
}
}