单片机设计_液晶滚动显示（AT89C51、LCD1602）

单片机液晶滚动显示（AT89C51、LCD1602）

更多项目私wo！！！

一、简介

此电路由AT89C51最小系统和LCD1602液晶模块组成。可实现上线垂直滚动、左右滚动和播放暂停。

二、执行效果

上下滚动

左右滚动

三、代码

/*更多项目私wo！！！*/
#include 
#include 
#define uchar unsigned char
#define uint unsigned int
void Initialize_LCD();
void ShowString(uchar,uchar,uchar *);
sbit K1 = P3^0;
sbit K2 = P3^1;
sbit K3 = P3^2;

uchar code Prompt[]="PRESS K1--K4 TO START DEMO PROG";
uchar const Line_Count = 6;
uchar code Msg[][80]=
{
 	"Many CAD users dismiss",
	"process of creating PCB",
	"of view.with PCB layout",
	"placement and track routing,",
	"can often be the most time",
	"And if you use circuit simulation",
	"you are going to spend even more"
};
uchar Disp_Buffer[32];
void Delayxms(uint ms)
{
 	uchar i;
	while(ms--)
	{
	 	for(i=0;i<120;i++);
	}
}

void H_Scroll_Display()
{
	uchar m,n,t = 0,L=0;
	uchar *p = Msg[0];
	uchar *q = Msg[Line_Count] + strlen(Msg[Line_Count]);
	for(m=0;m<16;m++)
			Disp_Buffer[m]=' ';	
	while(p<q)
	{
		for(m=16;m<32&&p<q;m++)
		{
		 	if(*p != '\0')
			{
				Disp_Buffer[m] = *p++; 	
			}
			else
			{
			 	if(++t>Line_Count)
					break;
				p = Msg[t];
				Disp_Buffer[m] = *p++;
			}
		}
		for(n=m;n<32;n++)
			Disp_Buffer[n]=' ';
		for(m=0;m<=16;m++)
		{
		 	while(F0)
		 		Delayxms(5);
		   	while(F0)
		 		Delayxms(5);
			Delayxms(20);
		}
		L = (L==0)? 1:0;
		Delayxms(200);
	}
	if(L==1)
}

void EX_INT0() interrupt 0
{
 	F0 = !F0;
}

void main()
{
 	uint Count = 0;
	IE = 0x81;
	IT0 = 1;
	F0  = 0;
	Initialize_LCD();
	ShowString(0,0,Prompt);
	ShowString(0,1,Prompt+16);
	while(1)
	{
	 	if(K1 == 0)
		{
		 	V_Scroll_Display();
			Delayxms(200);
		}
		else if(K2 == 0)
		{
		 	H_Scroll_Display();
			Delayxms(200);	
		}
	}
}