51单片机数字频率计-带仿真文件

http://www.51hei.com/f/51数字频率计.rar

#include
#include
#define uint unsigned int 
#define uchar unsigned char
unsigned char code dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//共阴数码管
unsigned char code dispcode[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//显示0-9
unsigned char count[8]={0,0,0,0,0,0,0,0};
unsigned int T0count=0;
unsigned char  time1tick=0;
unsigned char i=0;
unsigned long  x;

void pulse_init(void)
{
 TMOD=0x16;//T0工作在方式2，计数器模式
 TH0=0x00;
 TL0=0x00;
 TH1=0xb1;//20ms中断一次
 TL1=0xe0;
 ET0=1;
 ET1=1;
 EA=1;

}
void delay(uint ms)
{
 unsigned char i,j;
 for(i=0;i   for(j=0;j<250;j++)
  {
   _nop_();
   _nop_();
   _nop_();
   _nop_();
  }
}
static void time0_int(void) interrupt 1 using 0
{

 T0count++; //T0为计数器模式
}

void t1(void) interrupt 3 using 0
{ 

  time1tick++;
  TH1=0xb1;//20ms中断一次
  TL1=0xe0;
  if(time1tick==50)//定时1s
  {
      time1tick=0;
         EA=0;      
         TR0=0;
   TR1=0;
           
        
         
  }   
 
 
}

void display(void)
{        
                x=256*T0count+TL0-4; //转换成10进制
                x=x/17.3;
  i=7;//数码管的显示高位表示数据的低位
  while(x)//赋值
  {
   count[i]=x%10;
   x=x/10;
   i--;
  }
   count[i]=x;
  for(i=0;i<8;i++)
  {
     P1=dispbit[i];
   P0=dispcode[count[i]];
   delay(1);
  }
 
}
void main()
{
  pulse_init();
  TR1=1;//开启timer
  TR0=1;
  while(1)display();
}