rec_lcd.txt

单片机串行通信的源码

#include <reg52.h>

//#define uint  unsigned int
//#define uchar unsigned char
#define x1    0x80
#define x2    0x88
#define y     0x80
#define comm  0
#define dat   1

sbit rs = P1^2;   //H=data; L=command;
sbit rw = P1^5;   //H=read; L=write;
sbit  e = P1^7;   //input enable;
//sbit psb= P0^3;   //H=并口; L,=串口;
//sbit rst= P0^4;   //Reset Signal 低电平有效
unsigned char kkk[]={" "};


sbit busy=P0^7;   //lcd busy bit
unsigned int miao=0x00,fen=0x50,hour=0x22;
void wr_lcd (unsigned char dat_comm,unsigned char content);
void chk_busy (void);
void delay (unsigned int us);


unsigned char  tab1[]={
"----时----间----"
" 22 H 50 M  00 S"
"----日----期----"
" 07 Y 07 M  17D "
};



/*------------------初始化-----------------*/
void init_lcd (void)
{
  //rst=1;
  //psb=1;
  wr_lcd (comm,0x30);  /*30---基本指令动作*/   
  wr_lcd (comm,0x01);  /*清屏，地址指针指向00H*/
  wr_lcd (comm,0x06);  /*光标的移动方向*/
  wr_lcd (comm,0x0c);  /*开显示，关游标*/
}
/*---------------显示汉字或字符----------------*/
/*void chn_disp (unsigned char  *chn)
{
  unsigned char i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  for (j=0;j<1;j++)
  {
    for (i=0;i<16;i++)
    wr_lcd (dat,chn[j*16+i]);
   
  }
}*/
void chn_disp (unsigned char  *chn,unsigned char h,unsigned char l,unsigned char x)
{
  unsigned char b,c;
	
 
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  for(c=0;c<=(h*16+l-1);c++)
	wr_lcd (dat,kkk[0]);
	 for(b=0;b<x;b++)
	wr_lcd (dat,chn[b]);
}

/*--------------清DDRAM------------------*/
void clrram (void)
{
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x01);
}
/*---------------------------------------*/
void wr_lcd (unsigned char dat_comm,unsigned char content)
{
  chk_busy ();
  if(dat_comm)
   {
    rs=1;   //data
    rw=0;   //write
   }
  else 
   {
    rs=0;   //command
    rw=0;   //write
   }
  P0=content;   //output data or comm
  e=1;
  ;
  e=0;
}

void chk_busy (void)
{
  P0=0xff;
  rs=0;
  rw=1;
  e =1;
  while(busy==1);
  e =0;
}

void delay (unsigned int us)   //delay time
{
  while(us--);
}
void delay1 (unsigned int ms)
{
  unsigned int i,j;
  for(i=0;i<ms;i++)
  for(j=0;j<15;j++)
  delay(1);
}

  




void call (unsigned char  *cc)
{ cc[18]=hour%10+0x30;
cc[17]=hour/10+0x30;
cc[23]=fen%10+0x30;
cc[22]=fen/10+0x30;
cc[29]=miao%10+0x30;
cc[28]=miao/10+0x30;
  
  }


/*------------------主程序--------------------*/
/*void main ()
{ unsigned int t;
 miao=0x00;
 fen=0x10;
 hour=0x02;

  TMOD=0x01;
    TH0 = 0x4c; 
  	TL0 = 0x00; 
  	TR0 = 1;
  
delay1(8000);

  init_lcd ();
  while (1)
  {
     chn_disp(tab1);
    
      while (TF0)
     {t++;
      TF0=0;
      TH0=0X4C;
      TL0=0X00;}
  
     if(t>=20)
    {
     miao++;
      t=0;
    if(miao>=60)
    {fen++;
     miao=0;}
    if(fen>=60)
    {hour++;
     fen=0;}
    if(hour>=23)
    hour=0;
	}
 call(tab1);
}

}*/