findline.c

这个是做自动控制的小车的代码

#include "common.h"
#include "findline.h"
#include "pca.h"
uchar lineIR;
void findline()
{ 
  temppage = SFRPAGE;
  SFRPAGE=0X0F;
  P4=0XFF;
  lineIR=P4;
  SFRPAGE= temppage ;
  lineIR&=0x03;
  switch(lineIR)
  {
	 case 0x00:				 
			go_forward();
			 break;
	case 0x02:
	        turn_left();
			 break;
	case 0x01:
            turn_right();
			 break; 
    default:
             break; 
   }
delay1ms(50);
}