chn.c

12864液晶显示子程序

#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 = P0^0;   //H=data; L=command;
sbit rw = P0^1;   //H=read; L=write;
sbit  e = P0^2;   //input enable;
sbit psb= P0^3;   //H=并口; L=串口;
sbit rst= P0^4;   //Reset Signal 低电平有效

sbit busy=P2^7;   //lcd busy bit

void wr_lcd (uchar dat_comm,uchar content);
void chk_busy (void);
void delay (uint us);

uchar code tab2[]={
"祝：            "
"        涂涂    "
"愚人节快乐      "
"        柒柒    "

};



/*------------------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,0x0f);  /*开显示，关游标*/
}
/*---------------显示汉字或字符----------------*/
void chn_disp (uchar code *chn)
{
  uchar i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  for (j=0;j<4;j++)
  {
    for (i=0;i<16;i++)
    wr_lcd (dat,chn[j*16+i]);
  }
}

/*--------------清DDRAM------------------*/
void clrram (void)
{
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x01);
}
/*---------------------------------------*/
void wr_lcd (uchar dat_comm,uchar content)
{
  chk_busy ();
  if(dat_comm)
   {
    rs=1;   //data
    rw=0;   //write
   }
  else 
   {
    rs=0;   //command
    rw=0;   //write
   }
  P2=content;   //output data or comm
  e=1;
  
  e=0;
}

void chk_busy (void)
{
  P2=0xff;
  rs=0;
  rw=1;
  e =1;
  while(busy==1);
  e =0;
}

void delay (uint us)   //delay time
{
  while(us--);
}
void delay1 (uint ms)
{
  uint i,j;
  for(i=0;i<ms;i++)
  for(j=0;j<15;j++)
  delay(1);
}
/*------------------主程序--------------------*/
void main ()
{
  SP=0x5f;
    clrram();
  init_lcd ();

  while(1)
  {
chn_disp (tab2);
   } 
	
  
}