使用51单片机驱动TM1668显示DHT11温湿度的简单代码程序

以下是使用51单片机驱动TM1668显示DHT11温湿度的简单代码程序：

#include<reg52.h>
#include<intrins.h>

#define uchar unsigned char
#define uint unsigned int

sbit DHT11=P3^5;
sbit STB=P1^0;
sbit CLK=P1^1;
sbit DIO=P1^2;

uchar code table[]={
    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
    0x77,0x7c,0x39,0x5e,0x79,0x71
}; //共阴数码管0~9,A~F的段码

void delay(uint z) //延时函数
{
    uint x,y;
    for(x=z;x>0;x--)
        for(y=110;y>0;y--);
}

void write_byte(uchar dat) //写入一个字节
{
    uchar i;
    for(i=0;i<8;i++)
    {
        CLK=0;
        if(dat&0x01) DIO=1;
        else DIO=0;
        dat>>=1;
        CLK=1;
    }
}

void write_com(uchar com) //写入命令
{
    STB=0;
    write_byte(com);
    STB=1;
}

void write_data(uchar addr,uchar dat) //写入数据
{
    write_com(0x44);
    STB=0;
    write_byte(0xc0|addr);
    write_byte(dat);
    STB=1;
}

void init() //初始化
{
    write_com(0x88); //亮度全调
    write_com(0x40); //点地址方式
    write_com(0xc0); //从第一位开始显示
}

void display(uchar x,uchar y) //显示温度和湿度
{
    uchar wendu,shidu;
    write_data(y,table[x/10]); //显示十位
    write_data(y+1,table[x%10]); //显示个位
    write_data(y+2,0x38); //显示小数点
    write_data(y+3,table[shidu/10]); //显示十位
    write_data(y+4,table[shidu%10]); //显示个位
}

void main()
{
    uchar h,l,check;
    init();
    while(1)
    {
        DHT11=1;
        delay(1);
        DHT11=0; //起始信号
        delay(18);
        DHT11=1;
        delay(1);
        if(!DHT11) //判断DHT11响应信号是否存在
        {
            while(!DHT11);
            while(DHT11);
            h=0;
            l=0;
            h|=DHT11<<7;
            h|=DHT11<<6;
            h|=DHT11<<5;
            h|=DHT11<<4;
            h|=DHT11<<3;
            h|=DHT11<<2;
            h|=DHT11<<1;
            h|=DHT11;
            l|=DHT11<<7;
            l|=DHT11<<6;
            l|=DHT11<<5;
            l|=DHT11<<4;
            l|=DHT11<<3;
            l|=DHT11<<2;
            l|=DHT11<<1;
            l|=DHT11;
            check=0;
            check|=DHT11<<7;
            check|=DHT11<<6;
            check|=DHT11<<5;
            check|=DHT11<<4;
            check|=DHT11<<3;
            check|=DHT11<<2;
            check|=DHT11<<1;
            check|=DHT11;
            if(h+l==check) display(h,l); //判断数据是否正确
        }
    }
}

请注意，上述代码仅供参考，实际使用时需要根据具体硬件和软件环境进行适当修改。