LetAllLinesOfCodeSpeak

最新推荐文章于 2021-11-22 14:17:02 发布

jiangyiweijyw

最新推荐文章于 2021-11-22 14:17:02 发布

阅读量135

点赞数

分类专栏： LetAllLinesOfCodeSpeak 文章标签： LetAllLinesOfCodeSpeak

本文链接：https://blog.youkuaiyun.com/jiangxiaoweijxw/article/details/89498160

版权

LetAllLinesOfCodeSpeak 专栏收录该内容

42 篇文章

订阅专栏

/****************************************************************************************************************

*************************

*Author:JYW

*Time:2019_04_24

*Describe:LetAllLinesOfCodeSpeak

*****************************************************/

/*************************************
*Auther:JYW
*Time:2019_04_24
*Describe:代码练习DHT11等驱动练习
*********************************/

#define BV(x) 1<<x
void COM()
{//首先读入的是高位
   unsigned char i = 0;
   for(i= 0; i<8;i++)
   {
       uchartemp = 0;
ucharFLAG = 2;
   while((!DATA_PIN)&&ucharFLAG++);
       Delay_us(30);
       if(DATA_PIN) uchartemp = 1;
       ucharFLAG = 2;
       while((DATA_PIN)&&ucharFLAG++);
       if(DATA_PIN) break;//这一行代码在自己写的时候忘记了
       ucharDATA <<=1;
       ucharDATA |=uchartemp;

   }
}

void DHT11()
{
   P0DIR = BV(7);//输出
   DATA_PIN = 0;
   Delay_ms(19);
   DATA_PIN = 1;
   P0DIR = ~(DV(7));//输入
   Delay_us(40);

   if(!DATA_PIN)
   {
   ucharFLAG = 2;
       while((!DATA_PIN)&&ucharFLAG++);
       ucharFLAG = 2;
       while((DATA_PIN)&&ucharFLAG++);
       COM();
       HumBuf_H = ucharDATA;
       COM();
       HumBuf_L = ucharDATA;

       COM();
       TempBuf_H = ucharDATA;
       COM();
       TempBuf_L = ucharDATA;

       COM();
       CheckBufData = ucharDATA;
       if(CheckBufData = HumBuf_H + HumBuf_L + TempBuf_H + TempBuf_L)
       {
       Hum_H = HumBuf_H;
           Hum_L = HumBuf_L;
           Temp_H = TempBuf_H;
           Temp_L = TempBuf_L;
           CheckData = CheckBufData;

       }
       wendu_shi = Temp_H/10;
       wendu_ge = Temp_H%10;

       shidu_shi = Hum_H /10;
       shidu_ge = Hum_H %10;

   }

       else
       {
           wendu_shi = 0;
       wendu_ge = 0;

       shidu_shi = 0;
       shidu_ge = 0;

       }
       P0DIR = BV(7);//输出

}