lcd_c.c

lcd 与C51 的驱动程序 1、本实验箱采用的液晶显示屏内置控制器为SED1520

//液晶驱动程序
//时间：2005/4/16   
#include<reg51.h>
#define uchar unsigned char
//#define com   0x50
//#define dat   0x61
#define x1    0x52
#define yl    0x53
#define c_code 0x54
#define count  0x55
#define datbus P1
 sbit a0=P3^4;
 sbit rw=P3^5;
 sbit e2=P3^6;
 sbit e1=P3^7;
void delay(uchar t)
{uchar i,j;
 for(i=0;i<=t;i++)
 for(j=0;j<=100;j++);}
void write_l(uchar com)  //write left display
{a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e1=1;
 ACC=datbus;
 e1=0;
 }
 while(ACC^7);
 rw=0;
 datbus=com;
 e1=1;
 e1=0;
  }
void write_r(uchar com)   //write right display
{a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e2=1;
 ACC=datbus;
 e2=0;
 }
 while(ACC^7);
 rw=0;
 datbus=com;
 e2=1;
 e2=0;}
void write_l_dat(uchar dat)
{
a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e1=1;
 ACC=datbus;
 e1=0;
 }
 while(ACC^7);
 a0=1;
 rw=0;
 datbus=dat;
 e1=1;
 e1=0;
 }
 void write_r_dat(uchar dat)
 {a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e2=1;
 ACC=datbus;
 e2=0;
 }
 while(ACC^7);
 a0=1;
 rw=0;
 datbus=dat;
 e2=1;
 e2=0;
 }
void read_l_dat(uchar dat)
{
a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e1=1;
 ACC=datbus;
 e1=0;
 }
 while(ACC^7);
 a0=1;
 datbus=0xff;
 e1=0;}
 
void read_r_dat(uchar dat)
 {a0=0;
 rw=1;
 
 do
 {datbus=0xff;
 e2=1;
 ACC=datbus;
 e2=0;
 }
 while(ACC^7);
 a0=1;
 datbus=0xff;
 e2=0;
 }
void init(void)       //init
{write_l(0xe2);
 write_r(0xe2);
 write_l(0xa4);
 write_r(0xa4);
 write_l(0xa9);
 write_r(0xa9);
 write_l(0xa0);
 write_r(0xa0);
 write_l(0xc0);
 write_r(0xc0);
 write_r(0xaf);
}
void clear(void)
{uchar pag_addr=0x00;
 uchar blank_num;
 pag_addr|=0xb8;
 write_l(pag_addr);
 write_r(pag_addr);
 write_l(0x00);
 write_r(0x00):
 blank_num=0x50;
for(;blank_num>0;blank_num--){
 write_l_dat(0x00);
 write_r_dat(0x00);
}

}
display()
{}
void main(void)
{ delay(3);
  init();
  clear();
  display();
  while(1);
 }