51单片机 – 1602液晶显示字符串（非指针方式）

#include <reg52.h>

#define LCD1602_DB  P0
sbit LCD1602_RS = P1^0;
sbit LCD1602_RW = P1^1;
sbit LCD1602_E = P1^5;

void InitLcd1602();
void LcdSetCursor(unsigned char x, unsigned char y);
void LcdWriteDat(unsigned char dat);

void main()
{
	unsigned char str[] = "Hello World!";
	unsigned char i = 0;

	InitLcd1602();
    LcdSetCursor(0, 0);
    while(str[i] != '\0')
	{
		LcdWriteDat(str[i]);
        i++;
	}
	while(1);		
}

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