关于89c52单片机接LCD1602程序定义有几句看不懂

ID:488211 · 发表于 2019-4-13 22:13

#ifndef __LCD_H_
#define __LCD_H_
//#define LCD1602_4PINS
#include<reg51.h>
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef uint
#define uint unsigned int
#endif
#define LCD1602_DATAPINS P0
sbit LCD1602_E=P2^7;
sbit LCD1602_RW=P2^5;
sbit LCD1602_RS=P2^6;

void Lcd1602_Delay1ms(uint c);
void LcdWriteCom(uchar com);
void LcdWriteData(uchar dat) ;
void LcdInit();
#endif

请问这里
#define LCD1602_DATAPINS P0
sbit LCD1602_E=P2^7;
sbit LCD1602_RW=P2^5;
sbit LCD1602_RS=P2^6;
这里，

#define LCD1602_DATAPINS P0

定义P0口是什么意思?