在线等51单片机关于LCD1602光标闪烁的问题

LCD1602时钟程序，带有闪烁指示位置的。

#include

#define uchar unsigned char

#define uint  unsigned int

sbit LCD_EN=P2^2;

sbit LCD_RW=P2^1;

sbit LCD_RS=P2^0;

sbit s1    =P2^5;

sbit s2    =P2^6;

sbit s3    =P2^7;

uchar t0n;  //定时器T0中断计数,定时50ms,中断20次为1秒

uchar hour,minute,second; //声明小时,分,秒变量

void delay()

{

uint y;

for(y=0;y<100;y++);

}

void write_com(uchar cmd)

{

LCD_RS=0;

LCD_RW=0;

P0=cmd;

delay();

LCD_EN=1;

LCD_EN=0;

}

void write_dat(uchar dat)

{

LCD_RS=1;

LCD_RW=0;

P0=dat;

delay();

LCD_EN=1;

LCD_EN=0;

}

//初始化先不开闪烁

void init_1602(void)

{

LCD_RW=0;

LCD_RS=0;

LCD_EN=0;

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

write_com(0x80);

delay();

}

//显示时间子程序

void write_time(uchar x,uchar time)

{

write_com(0xc0+x);

write_dat(time/10+48);

write_dat(time%10+48);

write_com(0xc0+x+1);//恢复闪烁位置在个位

}

//显示字符串子程序

void write_str(uchar code *sp)

{

while(*sp!=0)

{

write_dat(*sp);

sp++;

}

}

void main()

{

uchar work;  //计时标志位,0:计时,1:调小时,2:调分,3:调秒

hour=10,minute=50;

init_1602();

write_com(0x80+2);

write_str("2018-05-19");

write_com(0xc0+4);

write_str("10:50:00");

TMOD=0x01;

TH0 =0x3C;  //单片机晶振频率=12M,定时50ms,时间常数=3CB0

TL0 =0xB0;

IE  =0x82;  //开中断

TR0 =1;     //启动定时器T0

while(1)

{

if(work==0&&t0n>=20) //计时状态

{

t0n=0;  //中断20次,1秒到

second++; //秒加1

if(second==60) //到60秒

{

second=0;

minute++;  //分加1

if(minute==60) //到60分

{

minute=0;

hour++; //小时加1

if(hour==24)

hour=0;

}

}

write_time(4,hour);

write_time(7,minute);

write_time(10,second);

}

if(s1==0)

{

work++;

if(work>3)

{

work=0;

TR0=1;

t0n=0;

write_com(0x0c);//恢复计时,关光标,关闪烁

}

else

{

TR0=0;

write_com(0x0d);  //关光标,开闪烁

write_com(0xc0+2+work*3);//指定闪烁位置

}

while(s1==0);

}

else if(work==1)

{

if(s2==0)

{

hour++;

if(hour>23)

hour=0;

write_time(4,hour);//按键后才显示,闪烁就不会漂移,以下同

while(s2==0);

}

if(s3==0)

{

hour--;

if(hour==0xff)

hour=23;

write_time(4,hour);

while(s3==0);

}

}

else if(work==2)

{

if(s2==0)

{

minute++;

if(minute>59)

minute=0;

write_time(7,minute);

while(s2==0);

}

if(s3==0)

{

minute--;

if(minute==0xff)

minute=59;

write_time(7,minute);

while(s3==0);

}

}

else if(work==3)

{

if(s2==0)

{

second++;

if(second>59)

second=0;

write_time(10,second);

while(s2==0);

}

if(s3==0)

{

second--;

if(second==0xff)

second=59;

write_time(10,second);

while(s3==0);

}

}

}

}

//定时器T0中断服务子程序

void T0_isr() interrupt 1

{

TH0=0x3C;  //重写时间常数

TL0=0xB0;

t0n++;     //中断次加1

}

仿真图如下，闪烁效果。

效果是啥也不动，光标一直再闪，按键不管用