一个简单的lcd1602显示时间(粗糙)

ID:440677 · 发表于 2018-12-7 08:53

#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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