标题: 一个简单的lcd1602显示时间(粗糙) [打印本页]

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作者: zlm8001    时间: 2018-12-7 08:53
标题: 一个简单的lcd1602显示时间(粗糙)
#include <reg52.h>
#include <intrins.h>
#include <string.h>
#define uint unsigned int
#define uchar unsigned char

sbit IO=P1^0;
sbit SCLK=P1^1;
sbit RST=P1^2;
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;

uchar *WEEK[]=
{
        "SUN","***","MON","TUS","WEN","THU","FRI","SAT"
};
uchar LCD_DSY_BUFFER1[]={"DATE 00-00-00   "};
uchar LCD_DSY_BUFFER2[]={"TIME 00:00:00   "};
uchar DateTime[7];

void DelayMS(uint ms)
{
  uchar i;
  while(ms--)
     { for(i=0;i<120;i++); }
}

void Write_A_Byte_TO_DS1302(uchar x)
{
  uchar i;
  for(i=0;i<8;i++)
    { IO=x&0x01;SCLK=1;SCLK=0;x>>=1; }
}

uchar Get_A_Byte_FROM_DS1302()
{
   uchar i,b=0x00;
   for(i=0;i<8;i++)
   {
         b |= _crol_((uchar)IO,i);
         SCLK=1;SCLK=0;
   }
   return b/16*10+b%16;
}

uchar Read_Data(uchar addr)
{
  uchar dat;
  RST=0;SCLK=0;RST=1;
  Write_A_Byte_TO_DS1302(addr);
  dat=Get_A_Byte_FROM_DS1302();
  SCLK=1;RST=0;
  return dat;
}

void GetTime()
{
   uchar i,addr=0x81;
   for(i=0;i<7;i++)
   { DateTime[i]=Read_Data(addr);addr+=2; }
}

uchar read_lcd_state()
{
  uchar state;
  RS=0;RW=1;EN=1;DelayMS(1);
  state=P0;
  EN=0;DelayMS(1);
  return state;
}

void lcd_busy_wait()
{
  while((read_lcd_state()&0x80)==0x80);
  DelayMS(5);
}

void write_lcd_data(uchar dat)
{
         lcd_busy_wait();
         RS=1;RW=0;EN=0;P0=dat;EN=1;DelayMS(1);
         EN=0;
}

void write_lcd_command(uchar dat)
{
         lcd_busy_wait();
         RS=0;RW=0;EN=0;P0=dat;EN=1;DelayMS(1);
         EN=0;
}

void init_lcd()
{
         write_lcd_command(0x38);
         DelayMS(1);
         write_lcd_command(0x01);
         DelayMS(1);
         write_lcd_command(0x06);
         DelayMS(1);
         write_lcd_command(0x0c);
         DelayMS(1);
}

void set_lcd_pos(uchar p)
{
        write_lcd_command(p|0x80);
}

void Display_LCD_String(uchar p,uchar *s)
{
        uchar i;
        set_lcd_pos(p);
        for(i=0;i<16;i++)
        {
          write_lcd_data(s[i]);
          DelayMS(1);
        }
}

void Format_DateTime(uchar d,uchar *a)
{
   a[0]=d/10+'0';
   a[1]=d%10+'0';
}

void main()
{
  init_lcd();
  while(1)
  {
        GetTime();
        Format_DateTime(DateTime[6],LCD_DSY_BUFFER1+5);
          Format_DateTime(DateTime[4],LCD_DSY_BUFFER1+8);
        Format_DateTime(DateTime[3],LCD_DSY_BUFFER1+11);

        strcpy(LCD_DSY_BUFFER1+13,WEEK[DateTime[5]]);

        Format_DateTime(DateTime[2],LCD_DSY_BUFFER2+5);
        Format_DateTime(DateTime[1],LCD_DSY_BUFFER2+8);
        Format_DateTime(DateTime[0],LCD_DSY_BUFFER2+11);

        Display_LCD_String(0x00,LCD_DSY_BUFFER1);
        Display_LCD_String(0x40,LCD_DSY_BUFFER2);
  }
}

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