error C202: 'P3': undefined identifier这个怎么改啊

#define __STC12C5A60S2_H_
#define uchar unsigned char
#define uint  unsigned int
sbit DQ=P3^7;//ds18b20与单片机连接口
sbit RS=P3^0;
sbit RW=P3^1;
sbit EN=P3^2;
sbit l=P0^0;

12C5A60S2.C(8): error C202: 'P3': undefined identifier
12C5A60S2.C(9): error C202: 'P3': undefined identifier
12C5A60S2.C(10): error C202: 'P3': undefined identifier
12C5A60S2.C(11): error C202: 'P0': undefined identifier

C文件中不能用#define __STC12C5A60S2_H_
应该用#include "STC12C5A60S2.H"或者#include <STC12C5A60S2.H>