1.23

#include<reg52.h>


#define LCD1602_DB P0
sbit LCD1602_RS = P2^4;
sbit LCD1602_RW = P2^5;
sbit LCD1602_E = P2^6;


void InitLcd1602();
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str);


void main()
{
    unsigned char str1[] = "ZhouTao";
unsigned char str2[] = "Welcome to China";


InitLcd1602();
LcdShowStr(2,0,str1);
LcdShowStr(0,1,str2);
}


void LcdWaitReady()
{
    unsigned char sta;


LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do{
   LCD1602_E = 1;
sta = LCD1602_DB;
LCD1602_E = 0;
}while(sta & 0x80);
}


void LcdWriteCmd(unsigned char cmd)
{
    LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_E = 1;
LCD1602_E = 0;
}


void LcdWriteDat(unsigned char dat)
{
    LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_E = 1;
LCD1602_E = 0;
}


void LcdSetCursor(unsigned char x,unsigned char y)
{
    unsigned char addr;


if(y == 0)
{
  addr = 0x00 + x; 
}
else
{
  addr = 0x40 + x;
}
LcdWriteCmd(addr|0x80);
}


void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str)
{
    LcdSetCursor(x,y);
while(*str != '\0')
{
   LcdWriteDat(*str++);
}
}


void InitLcd1602()
{
    LcdWriteCmd(0x38);
LcdWriteCmd(0x0C);
LcdWriteCmd(0x06);
LcdWriteCmd(0x01);
}