gate 定时器.txt

单片机写的程序都含有Protues仿真结果

 #include<reg51.h>
unsigned char code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned int a,flag;
void main()
{TMOD=0X09;

TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TR0=1;
EA=1;
ET0=1;
while(1)
   { P1=SEG7[a/10];
	 P2=SEG7[a%10];}
}
void t0() interrupt 1	using 0
{
   TH0=(65536-50000)/256;
   TL0=(65536-50000)%256;
     flag++;
	 if(flag==20)
	 { flag=0;
	 a++;
       	if(a==99)
	     {a=0;}
	  }
}