本人想學(xué)51單片機，做了一個程序，在不加定時器和主函數(shù)的時候液晶顯示正常，雖然時間不動，但是當打開定時器時加入main函數(shù)1602液晶上面一行全部是黑色的，下面一行沒反應(yīng)，具體程序有，望大蝦幫助解惑。
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit RS=P2^4;
sbit RW=P2^5;
sbit EN=P2^6;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
uchar count,shi,fen,miao;
uchar code shijian[]="TIME 00:00:00 ";
uchar code wendu[]="TEMP 00 C ";
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void LCD_write_com(uchar com)
{
RS=0;
RW=0;
EN=0;
P0=com;
delay(5);
EN=1;
delay(5);
EN=0;
}
void LCD_write_date(uchar date)
{
RS=1;
RW=0;
EN=0;
P0=date;
delay(5);
EN=1;
delay(5);
EN=0;
}
void LCD_init()
{
uchar num;
EN=0;
LCD_write_com(0x38);
delay(5);
LCD_write_com(0x0c);
delay(5);
LCD_write_com(0x06);
delay(5);
LCD_write_com(0x01);
LCD_write_com(0x80);
for(num=0;num<14;num++)
{
LCD_write_date(shijian[num]);
delay(5);
}
LCD_write_com(0x80+0x40);
for(num=0;num<11;num++)
{
LCD_write_date(wendu[num]);
delay(5);
}
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void LCD_write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
LCD_write_com(0x80+add);
LCD_write_date(0x30+shi);
LCD_write_date(0x30+ge);
}
void main()
{
LCD_init;
if(count==20)
{
count=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
LCD_write_sfm(6,shi);
}
LCD_write_sfm(9,fen);
}
LCD_write_sfm(12,miao);
}
}
void Timer0_isr(void) interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;
}
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