發(fā)一個(gè)1602滾動(dòng)顯示的C51程序，歡迎大家討論。
功能：從左至右，分2行滾動(dòng)顯示：“www.willar.com”和“WELCOME TO WEINA”

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char

typedef bit BOOL  

sbit rs = P2^0; 
sbit rw = P2^1;
sbit ep = P2^2;

void delay(uchar);
void lcd_wcmd(uchar);
BOOL lcd_bz();
void lcd_pos(uchar);
void lcd_wdat(uchar);
void display(uchar,uchar *);

uchar code dis1[] = {" www.willar.com "};
uchar code dis2[] = {"WELCOME TO WEINA"};

void longdelay(uchar s)  //長(zhǎng)延時(shí)
{
 while(s--)
 {
  delay(60);
 }
}

void delay(uchar ms)
{       // 延時(shí)子程序
 uchar i;
 while(ms--)
 {
  for(i = 0; i< 250; i++);
 }
}
 lcd_bz()
{       // 測(cè)試LCD忙碌狀態(tài)
 BOOL result;
 rs = 0;
 rw = 1;
 ep = 1;
 result = (BOOL)(P0 & 0x80);
 ep = 0;
 return result; 
}

void lcd_wcmd(uchar cmd)
{       // 寫入指令數(shù)據(jù)到LCD
 while(lcd_bz());
  rs = 0;
  rw = 0;
  ep = 0;
  P0 = cmd;
  ep = 1;
  ep = 0;  
}

void lcd_pos(uchar pos)
{       //設(shè)定顯示位置
 lcd_wcmd(pos | 0x80);
}

void lcd_wdat(uchar dat) 
{       //寫入字符顯示數(shù)據(jù)到LCD
 while(lcd_bz());
  rs = 1;
  rw = 0;
  ep = 0;
  P0 = dat;
  ep = 1;
  ep = 0; 
}

void lcd_init()
{       //LCD初始化設(shè)定
 lcd_wcmd(0x38);   //function set
 delay(1);
 lcd_wcmd(0x38);   //function set
 delay(1);
 lcd_wcmd(0x08);   //display on/off
 delay(1);
 lcd_wcmd(0x01);   //清除LCD的顯示內(nèi)容
 delay(1);
 lcd_wcmd(0x06);   //entry mode set
 delay(1);
 lcd_wcmd(0x0c);   //entry mode set
 delay(1);
}

/*－－－－－－－－－－－－－－－
函數(shù)名稱：display()
功能 ：在LCD上顯示數(shù)組的數(shù)據(jù)
說明 ：先寫顯示地址，后寫顯示數(shù)據(jù)
調(diào)用 ：lcd_wcmd(), lcd_pos()
入口參數(shù)：pos 寫入的位置，q指向要寫入的數(shù)據(jù)所在的數(shù)組
返回值 ：無
－－－－－－－－－－－－－－－－*/
void display(uchar pos, uchar *q)
{ 
 uchar i;
 //lcd_wcmd(0x01); //clear 
 delay(10);
 lcd_pos(pos);
 for(i=0;i<16;i++)
 {
  lcd_wdat(*q);
  q++;
  longdelay(2);
 } 
}

main()
{
 lcd_init();    // 初始化LCD   
 delay(10); 
 display(0x00,dis1);
 display(0x40,dis2);
 display(0x14,dis1);
 display(0x54,dis2);
 lcd_wcmd(0x07);   //entry mode set
 delay(1);
 while(1)
 { 
  display(0x00,dis1);
  //display(0x40,dis2);
  //display(0x14,dis1);
  //display(0x54,dis2);
 }
}