myproj.c

来自「暑假为学生培训写的51相关接口的所有源码及项目代码」· C语言 代码 · 共 104 行

#include <reg52.h>
#include <string.h>
#include <INTRINS.H>
#define uchar unsigned char


sbit RS=P2^0 ;
sbit RW=P2^1;
sbit E=P2^2;
 
uchar word[]={"Welcome"} ;

delay(uchar ms)
{
 uchar i, j;
 for(i=0;i<ms;i++)
 for(j=0;j<255;j++);
}

bit lcd_busy()
{
 bit busy;
  RS=0;
  RW=1;
  E=1;
  delay(5);
  busy=(bit)(P1&0x80) ;
  E=0;
  return busy ;
}



write_cmd(uchar cmd)
{
  while(lcd_busy());
  RS=0;
  RW=0;
  E=0;
  P1=cmd ;
  E=1;
  delay(15);
  E=0;
 }

 write_dat(uchar dat)
 {
   while(lcd_busy());
   RS=1;
   RW=0;
   E=0;
   P1=dat ;
   E=1;
   delay(15);
   E=0;
 }

void position(uchar pos)
{
 write_cmd(pos|0x80);
}

void clean_screen()
{
write_cmd(0x01);
delay(5);
}

 void init()
 {
  P0=0;
  write_cmd(0x38);
  delay(15);
  write_cmd(0x38);
  delay(15);
  write_cmd(0x38);
  delay(15);
  write_cmd(0x38);
  write_cmd(0x08);
  write_cmd(0x01);
  write_cmd(0x06);
  write_cmd(0x0c);
}


main()
{
  uchar i;
  delay(15);
  init();
  while(1)
  {
   clean_screen();
   position(0x01);
   i=0;
  while(word[i]!='\0')
  {
   write_dat(word[i]);
   i++;
   }
  delay(150);
  }
 }