time_lcd.c.bak

1602液晶的驱动和读写程序 付LCD1602液晶的英文资料

/*直接连接,无需跳线.*/
#include"reg52.h"
#define uchar unsigned char
#define uint unsigned int
sbit LCM_RW=P3^3; 								/*定义引脚*/
sbit LCM_RS=P3^2;
sbit LCM_E=P3^4  ;
#define LCM_Data P0
#define Busy 0x80 								/*用于检测LCM状态字中的Busy标识*/ 
#define XMS 5500      
uchar MScond=0;                                                                 /*ms*/
uchar Scond=0;                                                                  /*s*/
uchar Minute=0;                                                                 /*min*/
uchar Hour=0;                                                                   /*h*/
uchar buf[8];
void WriteDataLCM(uchar WDLCM);
void WriteCommandLCM(uchar WCLCM,BuysC);
uchar ReadDataLCM(void);
uchar ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(uchar X, uchar Y, uchar DData);
void DisplayStrChar(uchar X, uchar Y, uchar *DData);
void Delay5Ms(void);
void Delay400Ms(void);

uchar code Time[] = {"Now Time:"};
/**************************************************************************/
void timer0(void) interrupt 1 using 0
{
	TH0=0xb1;	
	TL0=0xeb;
	MScond=MScond+1;
	if(MScond==50)		
		{
      		        MScond=0;
	  		Scond=Scond+1;
	  		if(Scond==60)
	    		        {
	       			        Scond=0;
		   			Minute=Minute+1;
		   			if(Minute==60)
		      			        {
		        			        Minute=0;
			    			        Hour=Hour+1;
			    			        if(Hour==24)Hour=0;
			   			}
	      		        }
      	        }
}

void BCD(void)
{
	buf[7]=Scond%10+0x30;
	buf[6]=Scond/10+0x30;
	buf[5]=0x3a;
	buf[4]=Minute%10+0x30;
	buf[3]=Minute/10+0x30;
	buf[2]=0x3a;
	buf[1]=Hour%10+0x30;
	buf[0]=Hour/10+0x30;
}
/*************************************************************************/
	  
void main(void)
{
  	uchar TMP;
	TMOD=0x01;
  	TH0=0xb1;	
	TL0=0xeb;
  	TR0=1;
  	ET0=1;
  	EA=1;

        Delay400Ms(); 								/*启动等待，等LCM讲入工作状态*/
	LCMInit(); 								/*LCM初始化*/
	Delay5Ms(); 								/*延时片刻(可不要)*/
	DisplayStrChar(0, 0, Time);
	while(1)
		{if(TMP!=Scond){TMP=Scond;BCD();DisplayStrChar(8, 1, buf);}}
}
										/*写数据*/
void WriteDataLCM(uchar WDLCM)
{
	ReadStatusLCM(); 							/*检测忙*/
	LCM_Data = WDLCM;
	LCM_RS = 1;
	LCM_RW = 0;
	LCM_E = 0; 								/*若晶振速度太高可以在这后加小的延时*/
	LCM_E = 0; 								/*延时*/
	LCM_E = 1;
}

										/*写指令*/
void WriteCommandLCM(uchar WCLCM,BuysC) 		                        /*BuysC为0时忽略忙检测*/
{
	if (BuysC) ReadStatusLCM(); 				                /*根据需要检测忙*/
	LCM_Data = WCLCM;
	LCM_RS = 0;
	LCM_RW = 0; 
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1; 
}

										/*读数据*/
uchar ReadDataLCM(void)
{
	LCM_RS = 1; 
	LCM_RW = 1;
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;
	return(LCM_Data);
}

										/*读状态*/
uchar ReadStatusLCM(void)
{
	LCM_Data = 0xFF; 
	LCM_RS=0;
	LCM_RW = 1;
	LCM_E = 0;
	LCM_E = 0;
	LCM_E = 1;
	while (LCM_Data & Busy); 					        /*检测忙信号*/
	return(LCM_Data);
}

void LCMInit(void) 								/*LCM初始化*/
{
	LCM_Data = 0;
	WriteCommandLCM(0x38,0); 					        /*三次显示模式设置，不检测忙信号*/
	Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms(); 

	WriteCommandLCM(0x38,1); 						/*显示模式设置,开始要求每次检测忙信号*/
	WriteCommandLCM(0x08,1); 						/*关闭显示*/
	WriteCommandLCM(0x01,1); 						/*显示清屏*/
	WriteCommandLCM(0x06,1); 						/* 显示光标移动设置*/
	WriteCommandLCM(0x0C,1); 						/* 显示开及光标设置*/
}

										/*按指定位置显示一个字符*/
void DisplayOneChar(uchar X, uchar Y, uchar DData)
{
	Y &= 0x1;
	X &= 0xF; 								/*限制X不能大于15，Y不能大于1*/
	if (Y) X |= 0x40; 							/*当要显示第二行时地址码+0x40;*/
	X |= 0x80; 								/*算出指令码*/
	WriteCommandLCM(X, 0); 							/*这里不检测忙信号，发送地址码*/
	WriteDataLCM(DData);
}

										/*按指定位置显示一串字符*/
void DisplayStrChar(uchar X, uchar Y, uchar *DData)
{
	uchar ListLength;
	ListLength = 0;
	Y &= 0x1;
	X &= 0xF; 								/*限制X不能大于15，Y不能大于1*/
	while (DData[ListLength]>0) 						/*若到达字串尾则退出*/
		{
			if (X <= 0xF) 						/*X坐标应小于0xF*/
				{
					DisplayOneChar(X, Y, DData[ListLength]);/*显示单个字符*/
					ListLength++;
					X++;
				}
		}
}

										/*5ms延时*/
void Delay5Ms(void)
{
	uint TempCyc = 5552;
	while(TempCyc--);
}

										/*400ms延时*/
void Delay400Ms(void)
{
	uchar TempCycA = 5;
	uint TempCycB;
	while(TempCycA--)
		{
			TempCycB=7269;
			while(TempCycB--);
		}
}