一打开单片机定时器中断数码管就不显示?附程序 -

标题: 一打开单片机定时器中断数码管就不显示?附程序 [打印本页]

作者: 范莉萍 时间: 2022-12-11 02:16
标题: 一打开单片机定时器中断数码管就不显示?附程序
不打开定时器一切正常，求大佬提示！感谢！！

单片机源程序如下:
#include <reg51.h>
#include <stdio.h>
#include <intrins.h>

#define uchar unsigned char
#define uint unsigned int

#define DU  P0

unsigned char  ledchar[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F}; // 0~9
uint Temp;

uint t;
uchar Flag_connect ; //掉线标志位
uint MAX6675_temp;
uint BJ_temp;             //报警值
uchar Flag_Bj;  //报警标志位

uint p;

sbit xz = P2^7; //按键
sbit jia = P2^6;
sbit jian = P2^5;

sbit WEI_1 = P2^0 ;
sbit WEI_2 = P2^1 ;
sbit WEI_3 = P2^2 ;
sbit WEI_4 = P2^3 ;

sbit so = P1^5;
sbit sck = P1^6;
sbit cs = P1^7;

sbit baojing = P3^7;

sbit key1 = P2^5;
sbit key2 = P2^6;
sbit key3 = P2^7;
sbit baocun = P2^4;

sbit led = P3^0;

void xianshi(uint shuzhi);
void DelayMs(unsigned int i);
unsigned int MAX6675_Read();//读温度；
uint MAX6675_Oper();//温度运算
void Timer_Init();//定时器0初始化
void shezhi();  //按键设置
void UartInit(void);//串口初始化
void SendDate(unsigned char dat);

uchar a;
void Timer0() interrupt 1
{
      a++;
      TH1 = (65536-50000)/256;
      TL1 = (65536-50000)%256;
      if(a >= 10){
            led =~ led;
            a = 0;
      }

}

void Start()
{
      DU = 0x00;
      WEI_1 = 1;
      WEI_2 = 1;
      WEI_3 = 1;
      WEI_4 = 1;
            Flag_Bj = 0;
}

void main(void)
{
      Start();
      Timer_Init();
      DelayMs(1000);
      baojing = 0;
      BJ_temp = 145;

while (1){
         EA = 0;
         MAX6675_Oper();
         EA = 1;

         shezhi();

         if(MAX6675_temp >= BJ_temp ) //报警判断
         {
               baojing = 1;
            }else{baojing = 0;}

}
}

void xianshi(uint shuzhi){    //数码管显示函数，只显示三位数
      uchar ge;
      uchar shi;
      uchar bai;
      ge = shuzhi%10;
      shi = (shuzhi/10)%10;
      bai = shuzhi/100;

      WEI_1 = 1;
      WEI_2 = 1;
      WEI_3 = 1;
      WEI_4 = 1;
      WEI_2 = 0;
      DU = ledchar[bai];
      DelayMs(3);
      WEI_1 = 1;
      WEI_2 = 1;
      WEI_3 = 1;
      WEI_4 = 1;
      WEI_3 = 0;
      DU = ledchar[shi];
      DelayMs(3);
      WEI_1 = 1;
      WEI_2 = 1;
      WEI_3 = 1;
      WEI_4 = 1;
      WEI_4 = 0;
      DU = ledchar[ge];
      DelayMs(3);

}

void DelayMs(unsigned int i)       //一个延时函数，这个函数在11.0592M晶振下的延时时间大概为1ms
{
      unsigned int j,k;

      for(j=i; j>0; j--)
            for(k=114; k>0; k--);
}

unsigned int  MAX6675_Read(void) //max6675读十六位数值
{
      //EA = 0;

      uchar i;
      uint dat;
      i = 0;
      dat = 0;
      cs = 0;
      sck = 0;
      for(i = 0;i<16; i++)
      {
            sck = 1;
            dat = dat<<1;
            if(so == 1)
                     dat = dat|0x01;
            sck = 0;
      }
      cs = 1;

      return dat;
      //EA = 1;
}

uint MAX6675_Oper()
{

      t = MAX6675_Read();
      Flag_connect = t&0x04;
      Flag_connect = Flag_connect>>2;
      t = t<<1;
      t = t>>4;
      MAX6675_temp = t/4;

      if(Flag_connect==0 && Flag_Bj == 0){

            for(t = 0; t<200; t++)
            {
                     xianshi(MAX6675_temp);
            }
      }else {baojing = 1; xianshi(000);} //判断是否掉线，掉线报警，并且显示000

      //return MAX6675_temp;
}

void Timer_Init()
{
      EA = 1;
      ET1 = 1;
      TMOD = 0X10;
      TH1 = (65536-50000)/256;
      TL1 = (65536-50000)%256;
      TR1 = 1;
      a = 0;
}

void shezhi()
{
      if(key1 == 0)
      {
            DelayMs(10);
            if(key1 == 0)
            {
                     xianshi(BJ_temp);
                     Flag_Bj = 1;
            }
      }
      while(Flag_Bj == 1){xianshi(BJ_temp);
      if(key2 == 0)
      {
            DelayMs(10);
            if(key2 == 1){
                     BJ_temp++;
                     xianshi(BJ_temp);
            }
      }

      if(key3 == 0)
      {
            DelayMs(10);
            if(key3 == 1){
                     BJ_temp--;
                     xianshi(BJ_temp);
            }
      }

      if(baocun == 0)
      {
            DelayMs(10);
            if(baocun == 1){
                     Flag_Bj = 0;
            }
      }}
}

void UartInit(void)             //9600bps@11.0592MHz
{
      SCON = 0x50;             //8位数据,可变波特率
      TMOD &= 0x0F;             //设置定时器模式
      TL1 = 0xE8;             //设置定时初始值
      TH1 = 0xFF;             //设置定时初始值
      ET1 = 0;             //禁止定时器%d中断
      TR1 = 1;             //定时器1开始计时
}

void SendDate(unsigned char dat)//串口发送
{
   SBUF = dat;
   while(!TI);
   TI = 0;
}

作者: ytchfp163 时间: 2022-12-11 03:59
void SendDate(unsigned char dat)//串口发送
{
   SBUF = dat;
   while(!TI);
   TI = 0;
}
  “while(!TI);”中是否多了个“；”？

作者: 范莉萍 时间: 2022-12-11 11:23

ytchfp163 发表于 2022-12-11 03:59
void SendDate(unsigned char dat)//串口发送
{
SBUF = dat;

没有呀，等待ti

作者: 188610329 时间: 2022-12-11 14:58
你串口用定时器1 ，定时器又用定时器1？？中断开的还是定时器0！！！

这不正常才是正常现象！！

作者: lyy197709 时间: 2022-12-12 08:52
去掉所有的DELAY 试一下.

作者: 1928257231 时间: 2022-12-29 18:39
定时器换一下串口和中断不能用一个定时器

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