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標題: 89c51單片機控制，DHT11在1602上顯示為什么數據傳不到1602上 [打印本頁]

作者: 20171594i51 時間: 2019-3-19 14:57
標題: 89c51單片機控制，DHT11在1602上顯示為什么數據傳不到1602上
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define DATA P0
sbit rs=P1^0;
sbit rw=P1^1;
sbit en=P2^5;
uchar str1[]={"  "},str2[]={"  "};
uchar shduh_s,shdul_s,wenduh_s,wendul_s,jiaoyan_s;
uchar shduh,shdul,wenduh,wendul,jiaoyan;
uchar RH_data,RL_data,TH_data,TL_data,CK_data;
uchar FLAG,k,count,temp,comdata;
sbit wshbzh=P1^7;
void delay(xms)
{
      uint i,j;
      for(i=xms;i>0;i--)
      for(j=50;j>0;j--);
}
void Delay_10us(void)
{
      uchar i;
      i--;
      i--;
      i--;
      i--;
      i--;
      i--;
}
void minling(uchar comd)
{
      rs=0;
      rw=0;
      DATA=comd;
      delay(5);
      en=1;
      delay(5);
      en=0;
}
void writedata(uchar write)
{
      rs=1;
      rw=0;
      DATA=write;
      delay(5);
      en=1;
      delay(5);
      en=0;
}
void writechar(uchar x,y,Data)
{
      if (x==0)
      {
            minling(0x80+y-1);
      }
      else
      {
            minling(0xC0+y-1);
      }
      writedata(Data);
}
void lcdinit()
{
  minling(0x02);
      minling(0x06);
      minling(0x0c);
      minling(0x38);
      minling(0x01);
}
void writestring(uchar x,uchar y,uchar *s)
{
      if (x == 1)
      {
      minling(0x80 + y-1);
      }
else
      {
minling(0xC0 + y-1);
      }
while (*s)
      {
writedata( *s);
s ++;
      }
}
void COM()
{
      uchar i;
      for(i=0;i<8;i++)
      {
            FLAG=2;
            while((!wshbzh)&&FLAG++);
            Delay_10us();
            Delay_10us();
            Delay_10us();
            temp=0;
            if(wshbzh) temp=1;
            FLAG=2;
            while((wshbzh)&&FLAG++);
            if(FLAG==1)
                     break;
            comdata<<=1;
            comdata|=temp;       //0
      }
}
void RH()
{
      wshbzh=0;
      delay(200);
      wshbzh=1;
      Delay_10us();
      Delay_10us();
      Delay_10us();
      Delay_10us();

      wshbzh=1;

      if(!wshbzh)  //T !
      {
            FLAG=2;
            while((!wshbzh)&&FLAG++);
            FLAG=2;
            while((wshbzh)&&FLAG++);
            COM();
            shduh_s=comdata;
            COM();
            shdul_s=comdata;
            COM();
            wenduh_s=comdata;
            COM();
            wendul_s=comdata;
            COM();
            jiaoyan_s=comdata;
            wshbzh=1; //????
            temp=(shduh_s+shdul_s+wenduh_s+wendul_s);
            if(temp==jiaoyan_s)
            {
                     shduh=shduh_s;
                     shdul=shdul_s;
                     wenduh=wenduh_s;
                     wendul=wendul_s;
                     jiaoyan=jiaoyan_s;
            }
      }
}
int main()
{
      rs=0;
      rw=0;
      en=0;
      lcdinit();
                           writestring(1,1,"shidu:");
                     writestring(2,1,"wendu:");
                           writestring(1,10,"%");
                           writestring(2,10,"C");
      while(1)
      {
            RH();
                     RH_data=shduh;
                     RL_data=shdul;
                     TH_data=wenduh;
                     TL_data=wendul;
                     CK_data=jiaoyan;
                     str1[0]=(char)(0x30+RH_data/10);
                     str1[1]=(char)(0x30+RH_data%10);
                     str2[0]=(char)(0x30+TH_data/10);
                     str2[1]=(char)(0x30+TH_data%10);

                     writechar(1,8,str1[0]);
                                 writechar(1,9,str1[1]);
                     writechar(2,8,str2[0]);
                     writechar(2,9,str2[1]);
               delay(2000);
      }
}

作者: xuyaqi 時間: 2019-3-19 17:25
先實現能正確讀出DHT11的數據，再實現到1602顯示。

作者: lfc315 時間: 2019-3-19 18:10
writechar(2,9,str2[1]); ，這個語句不是把內容發到1602上顯示吧？

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