#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
請問這里
#define LCD1602_DATAPINS P0
sbit LCD1602_E=P2^7;
sbit LCD1602_RW=P2^5;
sbit LCD1602_RS=P2^6;
這里，#define LCD1602_DATAPINS P0
定義P0口是什么意思?
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