dj.c

数 字PID控制算法

#include<reg51.h>

#define uchar unsigned char
uchar code dispcode[11]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a};
uchar code disbitcode[8]={0xf0,0xe0,0xd0,0xc0,0xb0,0xa0,0x90,0x80};//位选//

unsigned char  num[8]={10,10,10,10,10,10,10,10};
uchar dis_b=0x00;    //数码显示的位//
uchar dis_r=0x00;	   //数码显示的段//

uchar data sec=0;
uchar data min=0;
unsigned int cou=0;


/*********************时间显示****************************/


/********************定时器0*********************************/

void time0(void) interrupt 1
 {
    cou++;
  if(cou==1000)
   {
    cou=0;
    sec++;
   if(sec==60)
    {
     sec=0;
     min++;
    if(min==60)
     min=0;
    }
   }
    num[2]=sec%10;
    num[1]=sec/10;
    num[0]=min%10;
    

    P2=dispcode[num[7-dis_r]]|disbitcode[dis_b];
    dis_r++;
    dis_r &=0x07;
    dis_b++;
    dis_b &=0x07;

    TH0=0xfc;
    TL0=0x18;
  }


void main(void)
 {
  TMOD=0x01;         // 定时/计数器0,1工作于方式1
  TH0=0xd8;          // 预置定时常数55536(d8f0),产生10ms时基信号
  TL0=0xf0;

  EA=1;              // 开总中断
  ET0=1;             // 定时/计数器0允许中断
  TR0=1;           // 开闭定时/计数器0


  while(1);
 }