51单片机中断
请问这个程序 中断是怎样进行的??
什么时候有中断申请,是从TR0=1开始就申请中断了吗???
什么时候响应中断
帮帮忙,一个人很难学...
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uchar temp,aa,num;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(uint z);
void main()
{
num=0;
aa=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;//定时器0
temp=0xfe;
P1=temp;
dula=1;
P0=table[0];
dula=0;
wela=1;
P0=0xc0;
wela=0;
while(1)
{
delay(1000);
temp=_crol_(temp,1);
P1=temp;
}
}
void delay(uint z) //延时
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
if(aa==40)
{
aa=0;
num++;
if(num==16)
num=0;
dula=1;
P0=table[num];
dula=0;
} //中断1秒,数码管加1
}