液晶时钟.c

keil c环境下的1602的显示程序

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int 
#define Data P0
sbit e=P3^5;
sbit rw=P3^6;
sbit rs=P3^7;




uchar code table1[]={"HXJ"};
uchar code table2[]={"www.HXJ.com"};


void read_status(void);


void write_data(uchar wd)
{
     read_status();
	 Data=wd;
	 rs=1;
	 rw=0;
	 e=0;

	 e=1;
  

}



void write_command(uchar wc,Busybit)
{
	if(Busybit)read_status();

	Data=wc;
	rs=0;
	rw=0;
	e=0;

	e=0;
	e=1;


}


void read_data(void)
{
	rs=1;
	rw=1;
	e=0;

	e=0;
	e=1;




}

void read_status(void)
{
	Data=0xff;
	rs=0;
	rw=1;
	e=0;

	e=0;
	e=1;
	while(Data & 0x80);

  return(Data);


}



void init(void)
{
	Data=0x00;
	write_command(0x38,0);
	  delay_5ms();
    	write_command(0x38,0);
	    	delay_5ms();
		  write_command(0x38,0);
	     		delay_5ms();
	write_command(0x38,1);
	write_command(0x08,1);
	write_command(0x01,1);
	write_command(0x06,1);
	write_command(0x0c,1);

}


void dispaly_onechar(uchar x,uchar y,uchar data)
{
	y&=0x01;
	x&=0x0f;

	if(y) x|=0x40;

	x|=0x80;
    write_command(x,0);
	write_data(data);
}




void display_string(uchar x,uchar y,uchar code *ddata)
{

	uchar strlength;
	strlength=0;
	y&=0x01;
	x&=0x0f;

	while(ddata[strlength]>0x20)
		{
			if(x<=0x0f)
				{
					display_onechar(x,y,ddata[strlength]);
					strlength++;
					x++;
				
				}
		}
	
}



void delay_5ms(void)
{
	uint num=5500;
	while(num--);
}

void delay_400ms(void)
{
	uint numA=5;
	uint numB;
	while(numA--)
		{
			numB=7200;
			while(numB--);
		
		};
}


 void main(void)
 {
 	delay_400ms();
	init();
	delay_5ms();


	display_string(3,0,table1);
 	display_string(3,1,table2);
	
	 LCM_ReadData();//测试用句无意义       
	 LCM_Data=255;
	while(1);

 }