基于C8051F020的1602显示时钟

#include<c8051f020.h>
#define uint unsigned  int
#define uchar unsigned char
//#define lcd_data_port P1   /*定义LCD控制端口*/

sbit RS=P2^0;    // RS数据命令选择端
sbit RW=P2^1;
sbit EN=P2^2;    //信号使能控制端

uint second,minute,hour;
int count;
uchar table2[] = {"  FY  TIMER  BY "};
uchar table1[]  = {"  :  :       F4"};
void SYSCLK_INIT()
{
  uint i;           //定义一个延时变量
  OSCXCN=0x67;      //启动外部振荡器22.1184M HZ 晶振
  for (i=0;i<256;i++);     //等待振荡器启动（延时超过1ms）
  while(!(OSCXCN & 0x80));   // 等待晶体振荡稳定
  OSCICN=0x88;       //选择外部振荡器作为系统时钟源并允许丢失时钟检测器
}



void init_timer3()  //定时器3 1ms
{
TMR3CN=0x00;
TMR3L=0xcd;
TMR3H=0xf8;
TMR3RLL=0xcd;

TMR3RLH=0xf8;
EIE2 |=0x01;
TMR3CN |=0x04;

}

void timer3() interrupt 14
{

count++;
if(count==1000)
{

second++;
count=0;
}
if(second==60)
  {
   second=0;
minute++;
  }
    if(minute==60)
      {
   minute=0;
hour++;
  }
if(hour==24)
      {
   hour=0;
  }