51单片机数字温湿度计代码

以下是51单片机数字温湿度计的代码：

#include <reg52.h>

typedef unsigned char uchar;
typedef unsigned int uint;

sbit DHT11 = P1^0;

uchar code table[] = "0123456789";

uchar humi_data, temp_data;

void delay(uint z)
{
    uint x,y;
    for(x = z; x > 0; x--)
    {
        for(y = 114; y > 0; y--);
    }
}

void start_dht11()
{
    DHT11 = 0;
    delay(25);
    DHT11 = 1;
    delay(30);
}

uchar dht11_receive()
{
    uint time_out = 0;
    while(DHT11 == 1 && time_out < 100)
    {
        time_out++;
        delay(1);
    }
    time_out = 0;
    while(DHT11 == 0 && time_out < 100)
    {
        time_out++;
        delay(1);
    }
    time_out = 0;
    while(DHT11 == 1 && time_out < 100)
    {
        time_out++;
        delay(1);
    }
    uchar i,j = 0;
    uchar data = 0;
    for(i = 0; i < 8; i++)
    {
        while(DHT11 == 0);
        delay(30);
        if(DHT11 == 1)
        {
            j = 1;
            while(DHT11 == 1);
        }
        if(j == 1)
        {
            data <<= 1;
            if(DHT11 == 1)
            {
                data |= 0x01;
            }
        }
    }
    return data;
}

void display(uchar dat)
{
    P0 = table[dat / 100];
    P2 = 0xfe;
    delay(5);
    P2 = 0xff;
    P0 = table[dat % 100 / 10];
    P2 = 0xfd; 
    delay(5);
    P2 = 0xff;
    P0 = table[dat % 10];
    P2 = 0xfb;
    delay(5);
    P2 = 0xff;
}

void main()
{
    while(1)
    {
        start_dht11();
        humi_data = dht11_receive();
        dht11_receive();
        temp_data = dht11_receive();
        dht11_receive();
        display(humi_data);
        display(temp_data);
    }
}

说明：

该代码使用DHT11传感器测量温湿度，通过单片机进行显示。使用了三个数码管，每个数码管都能显示一个数字。温度和湿度的数据分别通过两个数码管显示。