lcd1602.c

keil c 文件 @@##％％…… &……源代码程序

#include <reg51.h>
#include <string.h>
#include <intrins.h>
#include <stdio.h>
#include "base.h"

sbit RS=P3^0;
sbit RW=P3^1;
sbit E=P3^2;
sbit f=P3^3;
sbit busy=P2^7;
#define LCD_DATA_PORT P2


bit check()
{ 
  P2=0xff; 
  RS=0;
  RW=1;

  E=0;
  E=1;
  if (busy)
  {
   E=0;
  return 1;
  }
  else 
  {
    E=0;
  return 0;
  }
}

void write_cmd(uchar cmd)
{
   while (check());
   RS=0;
   RW=0;
   E=0;
   LCD_DATA_PORT=cmd;
   E=1;
   E=0;
}

void write_data(uchar d)
{
   while (check());
   RS=1;
   RW=0;
   E=0;
   LCD_DATA_PORT=d;
   E=1;
//   delay_ms(1);

   E=0; 
}


void lcd_init()
{

  write_cmd(0x38);
  write_cmd(0x0c);
  write_cmd(0x06);

}

void lcd_clear()
{
  write_cmd(0x01);
}
void lcd_display(uchar c ,uchar x, uchar y)
{
   write_cmd(0x80+0x40*y+x);
   write_data(c);
}

void lcd_display_s(char * str, uchar x, uchar y)
{
  uchar i;
  write_cmd(0x80+0x40*y+x);
  for (i=0;i<strlen(str);i++)
     write_data(str[i]);
}

void lcd_display_num(int n , uchar x ,uchar y)

{char str[16];
  
  sprintf(str,"%d",n);
  lcd_display_s(str,x,y);
   
}


/*
void main()
{
  f=1;
  lcd_init();

  lcd_display_s("abc",0,0);
  lcd_display_num(213,0,1);
  while(1);

}

*/