1602.c

字符液晶1602的驱动部分,可以直接使用

#include <reg51.h>
#include <intrins.h>
#include <ds1302.h>
#define LCD_BUS P0
sbit LCD_RS=P2^2;
sbit LCD_RW=P2^1;
sbit LCD_E=P2^0;
sbit P1_4=P1^4;

//延时
void delay_ms(unsigned int x)
{unsigned char n;
 while (x--)
  {   for(n=0;n<125;n++);
   }
}

//读命令(状态)
unsigned char LCD_RC(void)
{LCD_BUS=0xff;
 LCD_RS=0;
 LCD_RW=1;
 _nop_();
 LCD_E=1;
 _nop_();
 _nop_();
 while(LCD_BUS&0x80);
 LCD_E=0;
 return(LCD_BUS);
 }

//写命令
void LCD_WC(unsigned char commond, bit BUSY)
{if(BUSY) LCD_RC();
 LCD_RS=0;
 LCD_RW=0;
 _nop_();
 LCD_BUS=commond;
 _nop_();
 LCD_E=1;
 _nop_();
 LCD_E=0;
 }

//写数据
void  LCD_WD(unsigned char Ddata)
{
 LCD_RC();
 LCD_RS=1;
 LCD_RW=0;
 _nop_();
 LCD_BUS=Ddata;
 _nop_();
 LCD_E=1;
 _nop_();
 LCD_E=0;
 }

//LCD初始化
void LCD_INT()
{LCD_WC(0x38,0);//设置显示模式，三次，不测试忙信号
 
 delay_ms(4);
 LCD_WC(0x38,0);
 delay_ms(4);
 LCD_WC(0x38,0);
 delay_ms(4);
 
 ////////////////
 LCD_WC(0x38,1);//设置显示模式，测试忙信号
 LCD_WC(0x08,1);//关闭显示
 LCD_WC(0x01,1);//显示清屏
 LCD_WC(0x06,1);
 LCD_WC(0x0c,1);
 }
//按指定位置显示一个字符 
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData) 
{ 
 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40; 
 X |= 0x80; // 算出指令码,要+0x80 
 LCD_WC(X, 0); //这里不检测忙信号，发送地址码 
 LCD_WD(DData); 
}
//显示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char  *P) 
{ 
 unsigned char *buff;
 buff=P; 
 while(*buff!='\0')//若到达字串尾则退出 
  {	if(X>15){X=0,Y=1;}
     DisplayOneChar(X,Y,*buff); //显示单个字符  
     X++; buff++;
 } 
 
  } 

void show_time()
{v_Get1302(0x8d);//年.月.日....秒
 DisplayListChar(14,0,time);
  v_Get1302(0x89);
 DisplayListChar(0,1,time);
  v_Get1302(0x87);
 DisplayListChar(3,1,time);
  v_Get1302(0x85);
 DisplayListChar(6,1,time);
  v_Get1302(0x83);
 DisplayListChar(9,1,time);
  v_Get1302(0x81);
 DisplayListChar(12,1,time);
 }

void main(void)
{

LCD_INT();
initialize_DS1302();
DisplayListChar(0,0,"now time is:2006");
DisplayListChar(0,1,"  -  -  :  :  ");
 while(1)
 {show_time();
 }				 
 }