51单片机+DHT11+DS1302+LCD1602的问题

ID:1013894 · 发表于 2022-12-7 18:58

刚开始学单片机，不太懂其中的原理，想要测的DHT11数据和DS1302芯片模块得到的消息没有显示在LCD1062上，求大佬讲解一下哪里出问题了！下面是仿真图和代码！

ID:1013894 · 发表于 2022-12-7 18:58

代码在下面

ID:1013894 · 发表于 2022-12-7 18:58

#include "reg52.h"
#include "intrins.h"
#define uint unsigned int
#define uchar unsigned char
sbit Dat=P2^0;
sbit RS=P2^6;
sbit RW=P2^5;
sbit EN=P2^7;
sbit CE=P1^2;
sbit DSIO=P1^4;
sbit SCL=P1^3;
uchar code talble[]="0123456789";
uchar  read[]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};             //??????????????????????????
uchar  time[]={0x21,0x53,0x15,0x18,0x09,0x05,0x20};             //??????????????????????BCD?
uchar num0=0,num1=0,num2=0;
void delayms(uint z)       //12MHz?,z=1??1ms
{
      uint x,y;
      for(x=z;x>0;x--)
            for(y=122;y>0;y--);
}
void delayus(uchar z)             //12MHz?,z=1??17us
{
      while(z--);
}
/************************************??*************************************/
//??
/******************************DHT11??????********************************/
uchar Read_Byte()
{
      uchar m,n,sum;
      for(m=0;m<8;m++)
      {
            while(!Dat);       //??????????50us????,??50us??
            delayus(3);             //??50us?????
            sum<<=1;             //????,?????????0??1???,??????
            n=Dat;             //???
            if(n==1)
            {
                     sum=sum|0x01;
                     while(!Dat);       //???????
            }
            else
            {
                     sum=sum|0x00;
            }
            delayus(3);
      }
      return (sum);
}
void dht11()
{
      uchar m0,m1,m2,m3,m4;
      Dat=1;
      delayms(1);
      Dat=0;                               //?????
      delayms(20);             //????18ms
      Dat=1;                      //????,????DHT11????
      delayus(3);             //?????????,??20~40u?,??DHT11????
      if(Dat==0)             //??DHT11???????,?DHT11??????,????????80us,?????80us??????
      {
            while(!Dat);             //???????,????????
            while(Dat);                      //???????,???????80us,??????,???????
            m0=Read_Byte();             //????????
            m1=Read_Byte();             //????????
            m2=Read_Byte();             //????????
            m3=Read_Byte();             //????????
            m4=Read_Byte();             //?????
      }
      if(m4==(m0+m1+m2+m3))             //????,????????,??????????
      {
            num0=m0;
            num1=m2;
      }
      else
      {
            num0=num0;
            num1=num1;
      }
}
/************************************DS1302*************************************/
void Ds1302_Write_Byte(uchar addr,uchar dat)                      //?????????????
{
      uchar i;
      CE=0;                                     //CE????,??????
      SCL=0;                               //??????
      CE=1;                                     //CE??,??????
      for(i=0;i<8;i++)       //????,??8???
      {
            DSIO=addr&0x01;       //????????
            addr>>=1;                                     //?????1?
            SCL=1;             //????????DS1302
            _nop_();
            SCL=0;
            _nop_();
      }
      for(i=0;i<8;i++)       //?????
      {
            DSIO=dat&0x01;
            dat>>=1;
            SCL=1;
            _nop_();
            SCL=0;
            _nop_();
      }
      CE=0;
}
uchar Ds1302_Read_Byte(uchar addr)                      //?????????
{
      uchar i,dat0,dat1;
      CE=0;                                     //CE????,???
      SCL=0;                               //SCL????,???
      CE=1;                                     //??DS1302??,CE??
      for(i=0;i<8;i++)
      {
            DSIO=addr&0x01;             //?????,??addr????,?????DSIO
            addr>>=1;                               //???????,????,???0
            SCL=1;                                     //??SCL????,????,???????,?????DS1302,??????,?????
            _nop_();
            SCL=0;                                     //?SCL??,??????????
            _nop_();
      }
      for(i=0;i<8;i++)
      {
            dat0=DSIO;
            dat1=(dat1>>1)|(dat0<<7);
            SCL=1;
            _nop_();
            SCL=0;
            _nop_();
      }
      CE=0;
      SCL=1;
      DSIO=0;
      DSIO=1;
      return dat1;
}
void DS1302_Init()
{
      Ds1302_Write_Byte(0x8e,0x00);             //????????
      Ds1302_Write_Byte(0x80,0x21);             //?????
      Ds1302_Write_Byte(0x82,0x53);             //?????
      Ds1302_Write_Byte(0x84,0x15);             //?????
      Ds1302_Write_Byte(0x86,0x18);             //?????
      Ds1302_Write_Byte(0x88,0x09);             //?????
      Ds1302_Write_Byte(0x8a,0x05);             //????
      Ds1302_Write_Byte(0x8c,0x20);             //????
      Ds1302_Write_Byte(0x8e,0x80);             //?????
}
void Read_time()
{
      uchar i;
      for(i=0;i<7;i++)
      {
            time[i]=Ds1302_Read_Byte(read[i]);
      }
}
/************************************??*************************************/
//??
/**********************************1602??*************************************/
bit Busy()
{
      bit bsy;
      RS=0;
      RW=1;
      EN=1;
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      bsy=(bit)(P0&0x80);
      EN=0;
      return (bsy);
}
void Wr_com(uchar com)
{
      while(Busy());
      RS=0;
      RW=0;
      P0=com;
      delayus(1);
      EN=1;
      EN=0;
}
void Wr_dat(uchar dat)
{
      while(Busy());
      RS=1;
      RW=0;
      P0=dat;
      delayus(1);
      EN=1;
      EN=0;
}
void LCD_Init()
{
      Wr_com(0x38);
      Wr_com(0x0C);
      Wr_com(0x06);
      Wr_com(0x01);
}
void display()
{
      Wr_com(0x80);
      Wr_dat('2');
      Wr_dat('0');
      Wr_dat('0'+time[6]/16);                               //?
      Wr_dat('0'+(time[6]&0x0f));
      Wr_dat('-');                                                       //-
      Wr_dat('0'+time[4]/16);                               //?
      Wr_dat('0'+(time[4]&0x0f));
      Wr_dat(0xb0);                                                       //-
      Wr_dat('0'+time[3]/16);                               //?
      Wr_dat('0'+(time[3]&0x0f));

      Wr_com(0x80+0x0b);
      Wr_dat('0'+(time[5]&0x0f));             //??

      Wr_com(0x80+0x0d);
      Wr_dat(talble[num0/10]);                      //??
      Wr_dat(talble[num0%10]);
      Wr_dat(0x25);                                                       //%

      Wr_com(0xC0);
      Wr_dat('0'+time[2]/16);                               //?
      Wr_dat('0'+(time[2]&0x0f));
      Wr_dat(0x3a);                                                       //:
      Wr_dat('0'+time[1]/16);                               //?
      Wr_dat('0'+(time[1]&0x0f));
      Wr_dat(0x3a);                                                       //:
      Wr_dat('0'+time[0]/16);                               //?
      Wr_dat('0'+(time[0]&0x0f));

      Wr_com(0xC0+0x0a);
      Wr_dat(talble[num1/10]);                      //??
      Wr_dat(talble[num1%10]);
      Wr_dat(0x2e);                                                       //.
      Wr_dat(talble[0]);
      Wr_dat(0xdf);                                                       //
      Wr_dat(0x43);                                                       //C
}
void main()
{
      uint a;
      LCD_Init();
      DS1302_Init();
      while(1)
      {
            a++;
            if(a==20)
            {
                  a=0;
                  dht11();
               }
            Read_time();
            display();
      }

}

ID:1013894 · 发表于 2022-12-7 19:07

vjack 发表于 2022-12-7 18:58
#include "reg52.h"
#include "intrins.h"
#define uint unsigned int

求大佬帮忙看看是什么问题！！

ID:844772 · 发表于 2022-12-7 20:01

仔细看看，你把LCD数据线接到哪里了

ID:1013894 · 发表于 2022-12-7 21:02

glinfei 发表于 2022-12-7 20:01
仔细看看，你把LCD数据线接到哪里了

sbit Dat=P2^0;
sbit RS=P2^6;
sbit RW=P2^5;
sbit EN=P2^7;
sbit CE=P3^5;
sbit DSIO=P3^4;
sbit SCL=P3^6;

我LCD数据线和图核对后，LCD还是没有显示

ID:1013894 · 发表于 2022-12-7 21:08

vjack 发表于 2022-12-7 21:02
sbit Dat=P2^0;
sbit RS=P2^6;
sbit RW=P2^5;

喔喔我知道了谢谢大哥！新手不太懂不好意思~~

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