幫我看看單片機(jī)定時器程序，設(shè)置定時一秒，實(shí)際測出來比一秒快太多了

ID:787039 · 發(fā)表于 2021-6-19 19:32

#include <STC12C5A60S2.h>
#include <intrins.h>
typedef unsigned char u8;
typedef unsigned int u16;

//stc15w408as共陽數(shù)碼管代碼

u16  mun, key=0,key_;//變量聲明

u8 code tab[16][10]=
{{1,1,0,0,0,0,0,0},
{1,1,1,1,1,0,0,1},
{1,0,1,0,0,1,0,0},
{1,0,1,1,0,0,0,0},
{1,0,0,1,1,0,0,1},
{1,0,0,1,0,0,1,0},
{1,0,0,0,0,0,1,0},
{1,1,1,1,1,0,0,0},
{1,0,0,0,0,0,0,0},
{1,0,0,1,0,0,0,0},
{1,0,0,0,1,0,0,0},//a
{1,0,0,0,0,0,1,1},//b
{1,1,0,0,0,1,1,0},//c
{1,0,1,0,0,0,0,1},//d
{1,0,0,0,0,1,1,0},//e
{1,0,0,0,1,1,1,0}};//f

sbit A_=P1^0;//斷碼
sbit B_=P1^1;
sbit C_=P1^2;
sbit D_=P1^3;
sbit E_=P1^4;
sbit F_=P1^5;
sbit G_=P1^6;
sbit H_=P3^7;

sbit GeWei=P2^6;
sbit ShiWei=P2^7;

void Delay10ms();
unsigned char Desplay(unsigned char mun,com);
void Delay1ms()       ;
void Time();

void main()

      {Time();//定時器初始化
            while(1)
                     {
                     if(key==60)
                     {
                     key=0;
                     }
         Desplay( key%10,1);
               Desplay((key/10)%10,2);
}
               }

void Time()
      {
      AUXR &= 0x7F;             //定時器時鐘12T模式
      TMOD &= 0xF0;             //設(shè)置定時器模式
      TMOD |= 0x01;             //設(shè)置定時器模式
      TL0 = 0x00;             //設(shè)置定時初值
      TH0 = 0xB8;             //設(shè)置定時初值
      TF0 = 0;             //清除TF0標(biāo)志
      TR0 = 1;             //定時器0開始計時
      ET0=1;
      EA=1;
      }
unsigned char Desplay(unsigned char mun,com)
      {u8 i;
      for(i=0;i<8;i++)
            {
                     switch(i)
                              {
                                    case 0:A_=tab[mun][7];break;
                                    case 1:B_=tab[mun][6];break;
                                    case 2:C_=tab[mun][5];break;
                                    case 3:D_=tab[mun][4];break;
                                    case 4:E_=tab[mun][3];break;
                                    case 5:F_=tab[mun][2];break;
                                    case 6:G_=tab[mun][1];break;
                                    case 7:H_=tab[mun][0];break;
                                                                                             }
                                                                                                      }
               switch(com)
                              {
                                    case 1:GeWei=1;ShiWei=0;break;
                                    case 2:GeWei=0;ShiWei=1;break;
                                                                                             }
                                    Delay1ms();
                                       A_=1;B_=1;C_=1;D_=1;E_=1;F_=1;G_=1;H_=1;
                                    GeWei=0;
                                    ShiWei=0;
                                                                                                            }
void titn_time_ () interrupt 1
      {
      TL0 = 0x00;             //設(shè)置定時初值
      TH0 = 0xB8;             //設(shè)置定時初值
                     ++mun;
                     if(mun==50)
                     { mun=0;
                     key++;}

                                    }

void Delay1ms()             //@11.0592MHz
{
      unsigned char i, j;

      _nop_();
      i = 11;
      j = 190;
      do
      {
            while (--j);
      } while (--i);
}