做51单片机18B20 数码管一直闪烁不知道该怎么弄求大佬 -

标题: 做51单片机18B20 数码管一直闪烁不知道该怎么弄求大佬 [打印本页]

作者: zzk15963 时间: 2020-9-7 16:42
标题: 做51单片机18B20 数码管一直闪烁不知道该怎么弄求大佬
#include "reg52.h"
#include"18B20ZHONGJI.H"
typedef unsigned int u16;
typedef unsigned char u8;
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;

char num=0;
u8 DisplayData[8];
u8 code smgduan[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
/*******************************************************************************
* ?? ?? ??       : delay
* ????????    : ?????????i=1?????????10us
*******************************************************************************/
void delay(u16 i)
{
while(i--);
}

/*******************************************************************************
* ?? ?? ??       : datapros()
* ????????    : ????????????????
* ?? ??       : temp
* ?? ??       : ??
*******************************************************************************/
void datapros(int temp)
{
float tp;
if(temp< 0) //???????????
{
  DisplayData[0] = 0x40; // -
  //????????????????????????????1?????????????
  temp=temp-1;
  temp=~temp;
  tp=temp;
  temp=tp*0.0625*100+0.5;
  //??????С?????*100??+0.5?????????????C??????????????????????С????
  //????????????????????????0.5????+0.5??????0.5??????1???С??0.5???
  //?????0.5????????С??????档

}
  else
{
  DisplayData[0] = 0x00;
  tp=temp;//????????????С???????????????????????????
  //?????????????????????????????????????????
  temp=tp*0.0625*100+0.5;
  //??????С?????*100??+0.5?????????????C??????????????????????С????
  //????????????????????????0.5????+0.5??????0.5??????1???С??0.5???
  //?????0.5????????С??????档
}

void DigDisplay()
{
u8 i;
for(i=0;i<6;i++)
{
  switch(i)  //λ?????????????????
  {
case(0):
LSA=1;LSB=1;LSC=1; break;//?????0λ
case(1):
LSA=0;LSB=1;LSC=1; break;//?????1λ
case(2):
LSA=1;LSB=0;LSC=1; break;//?????2λ
case(3):
LSA=0;LSB=0;LSC=1; break;//?????3λ
case(4):
LSA=1;LSB=1;LSC=0; break;//?????4λ
case(5):
LSA=0;LSB=1;LSC=0; break;//?????5λ
delay(100);
  }
  P0=DisplayData[i];//????????
  delay(1); //????????????
  P0=0xFF;//????
}
}

void main()
{
while(1)
{
  datapros(Ds18b20ReadTemp());  //??????????
  DigDisplay();//????????????
}
}#include"18b20zhongji.h"

void Delay1ms(uint y)
{
uint x;
for( ; y>0; y--)
{
  for(x=110; x>0; x--);
}
}

uchar Ds18b20Init()
{
uchar i;
DSPORT = 0; //??????????480us~960us
i = 70;
while(i--);//???642us
DSPORT = 1; //???????????????DS18B20???????????15us~60us??????????
i = 0;
while(DSPORT) //???DS18B20????????
{
  Delay1ms(1);
  i++;
  if(i>5)//???>5MS
  {
return 0;//????????
  }

}
return 1;//????????
}

void Ds18b20WriteByte(uchar dat)
{
uint i, j;
for(j=0; j<8; j++)
{
  DSPORT = 0;       //?д???λ?????????????????1us
  i++;
  DSPORT = dat & 0x01;  //???д???????????????λ???
  i=6;
  while(i--); //???68us?????????????60us
  DSPORT = 1; //???????????????1us?????????????????д?????????
  dat >>= 1;
}
}

uchar Ds18b20ReadByte()
{
uchar byte, bi;
uint i, j;
for(j=8; j>0; j--)
{
  DSPORT = 0;//???????????1us
  i++;
  DSPORT = 1;//??????????
  i++;
  i++;//???6us??????????
  bi = DSPORT;  //?????????????λ??????
  /*??byte?????λ?????????????7λ???bi????????????????λ??0??*/
  byte = (byte >> 1) | (bi << 7);
  i = 4;  //??????????48us??????????????
  while(i--);
}
return byte;
}

void  Ds18b20ChangTemp()
{
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xcc);  //????ROM????????
Ds18b20WriteByte(0x44);    //??????????
//Delay1ms(100); //??????????????????????????????????????????

}

void  Ds18b20ReadTempCom()
{
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xcc);  //????ROM????????
Ds18b20WriteByte(0xbe);  //?????????????
}

int Ds18b20ReadTemp()
{
int temp = 0;
uchar tmh, tml;
Ds18b20ChangTemp();    //??д?????????
Ds18b20ReadTempCom(); //??????????????????????
tml = Ds18b20ReadByte();  //?????????16λ??????????
tmh = Ds18b20ReadByte();  //????????
temp = tmh;
temp <<= 8;
temp |= tml;
return temp;
}
#ifndef __18b20zhongji_H_
#define __18b20zhongji_H_
#include<reg52.h>
//---?????????---//
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef uint
#define uint unsigned int
#endif
//--????????IO??--//
sbit DSPORT=P3^7;
//--??????????--//
void Delay1ms(uint );
uchar Ds18b20Init();
void Ds18b20WriteByte(uchar com);
uchar Ds18b20ReadByte();
void  Ds18b20ChangTemp();
void  Ds18b20ReadTempCom();
int Ds18b20ReadTemp();
#endif

作者: wulin 时间: 2020-9-7 19:42
参见类似现象的回帖http://www.51hei.com/bbs/dpj-194698-1.html

作者: TTQ001 时间: 2020-9-8 01:29
楼上的链接很有帮助。该帖子为这个问题提供了正确的原因。

作者: 0x00000000 时间: 2020-9-10 13:09
你的Ds18b20ReadTemp()占用了太多时间导致LED刷新率太低。
你需要一个定时器做刷新。

作者: wocjisji 时间: 2020-10-9 17:35
先把数码管是共阴极还是共阳极搞清楚

作者: 小炒肉111 时间: 2020-10-9 18:00
1、消隐问题注意

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