51单片机烟雾传感器、TLC549、THD11和LCD1602做温湿度和烟雾报警器代码

以下是基于您的需求所编写的51单片机烟雾传感器、TLC549、THD11和LCD1602做温湿度和烟雾报警器的代码。请注意，这只是基本的代码框架，您可能需要根据您的具体需求进行修改。

#include <reg51.h>

#define uchar unsigned char
#define uint unsigned int

//烟雾传感器口定义
sbit SmokeSensor = P3^4;

//TLC549口定义
sbit AD_CLK = P3^5;   //ADC转换时序控制引脚
sbit AD_DIN = P3^6;   //ADC转换数据输入引脚
sbit AD_DOUT = P3^7;  //ADC转换数据输出引脚

//温湿度传感器口定义
sbit DHT11 = P3^2;

//LCD1602口定义
sbit LCD_RS = P1^0;   //LCD1602命令/数据选择引脚
sbit LCD_RW = P1^1;   //LCD1602读/写选择引脚
sbit LCD_EN = P1^2;   //LCD1602使能引脚
sbit LCD_D4 = P1^4;   //LCD1602数据引脚D4
sbit LCD_D5 = P1^5;   //LCD1602数据引脚D5
sbit LCD_D6 = P1^6;   //LCD1602数据引脚D6
sbit LCD_D7 = P1^7;   //LCD1602数据引脚D7

//LCD1602显示位置定义
uchar dis_pos[4][2] = {{0, 0}, {0, 1}, {0, 2}, {0, 3}};

//函数声明
void init_lcd1602();
void lcd_write_cmd(uchar cmd);
void lcd_write_data(uchar dat);
void lcd_set_xy(uchar x, uchar y);
void lcd_show_string(uchar x, uchar y, uchar *str);
void delay(uint z);
uint tlc549_read(uchar channel);
void thd11_start();
uchar thd11_ack();
uchar thd11_read_byte();
void thd11_read(uchar *temperature, uchar *humidity);

//主函数
void main()
{
    uchar temperature, humidity;
    uint smoke_value, adc_value;
    uchar buf[16];

    init_lcd1602();  //初始化LCD1602

    while (1)
    {
        //读取烟雾传感器数值
        smoke_value = SmokeSensor;

        //读取TLC549模数转换器数值
        adc_value = tlc549_read(0);

        //读取温湿度传感器数值
        thd11_read(&temperature, &humidity);

        //在LCD1602上显示数据
        lcd_show_string(dis_pos[0][0], dis_pos[0][1], "Temp:");
        sprintf(buf, "%02d ", temperature);
        lcd_show_string(dis_pos[0][0]+6, dis_pos[0][1], buf);
        lcd_show_string(dis_pos[0][0]+9, dis_pos[0][1], "C");

        lcd_show_string(dis_pos[1][0], dis_pos[1][1], "Humi:");
        sprintf(buf, "%02d ", humidity);
        lcd_show_string(dis_pos[1][0]+6, dis_pos[1][1], buf);
        lcd_show_string(dis_pos[1][0]+9, dis_pos[1][1], "%");

        lcd_show_string(dis_pos[2][0], dis_pos[2][1], "Smoke:");
        sprintf(buf, "%d", smoke_value);
        lcd_show_string(dis_pos[2][0]+7, dis_pos[2][1], buf);

        //判断烟雾数值是否超过阈值
        if (smoke_value > 0)
        {
            //触发报警器
            //TODO: 根据具体需求编写相应的代码
        }

        delay(500);
    }
}

//初始化LCD1602
void init_lcd1602()
{
    lcd_write_cmd(0x38);  //显示模式设置：16×2，5×7点阵，8位数据
    lcd_write_cmd(0x0c);  //显示开关控制：显示开，光标关，光标闪烁关
    lcd_write_cmd(0x06);  //输入方式设置：光标移动，地址+1
    lcd_write_cmd(0x01);  //清屏
}

//向LCD1602写命令
void lcd_write_cmd(uchar cmd)
{
    LCD_RS = 0;
    LCD_RW = 0;
    LCD_EN = 0;
    P1 = (P1 & 0x0F) | (cmd & 0xF0);
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
    P1 = (P1 & 0x0F) | ((cmd & 0x0F) << 4);
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
}

//向LCD1602写数据
void lcd_write_data(uchar dat)
{
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_EN = 0;
    P1 = (P1 & 0x0F) | (dat & 0xF0);
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
    P1 = (P1 & 0x0F) | ((dat & 0x0F) << 4);
    LCD_EN = 1;
    delay(1);
    LCD_EN = 0;
}

//设置LCD1602的显示位置
void lcd_set_xy(uchar x, uchar y)
{
    uchar pos;

    if (y == 0)
        pos = 0x80 + x;
    else
        pos = 0xC0 + x;

    lcd_write_cmd(pos);
}

//在LCD1602上显示字符串
void lcd_show_string(uchar x, uchar y, uchar *str)
{
    lcd_set_xy(x, y);

    while (*str != '\0')
    {
        lcd_write_data(*str++);
    }
}

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

//TLC549模数转换器读取函数
uint tlc549_read(uchar channel)
{
    uint res = 0;
    uchar i;

    //配置ADC转换通道
    AD_CLK = 0;
    AD_DIN = 1;
    AD_CLK = 1;
    AD_CLK = 0;
    AD_DIN = 1;
    AD_CLK = 1;
    AD_CLK = 0;
    AD_DIN = 0;
    AD_CLK = 1;
    AD_CLK = 0;
    AD_DIN = channel & 0x07;
    AD_CLK = 1;

    //等待转换完成
    while (AD_DOUT);

    //读取转换结果
    for (i = 0; i < 16; i++)
    {
        AD_CLK = 0;
        res <<= 1;
        if (AD_DOUT)
            res |= 0x01;
        AD_CLK = 1;
    }

    return res;
}

//THD11开始信号
void thd11_start()
{
    DHT11 = 0;
    delay(20);
    DHT11 = 1;
    delay(30);
}

//THD11响应信号
uchar thd11_ack()
{
    uchar i = 0;

    while (DHT11);

    delay(80);

    if (!DHT11)
    {
        while (!DHT11);
        return 1;
    }
    else
    {
        return 0;
    }
}

//THD11读取一个字节数据
uchar thd11_read_byte()
{
    uchar i, dat = 0;

    for (i = 0; i < 8; i++)
    {
        while (!DHT11);

        delay(30);

        if (DHT11)
            dat |= (1 << (7 - i));

        while (DHT11);
    }

    return dat;
}

//读取THD11温湿度传感器数据
void thd11_read(uchar *temperature, uchar *humidity)
{
    uchar buf[5];
    uchar i;

    //发送开始信号
    thd11_start();

    //等待响应信号
    if (thd11_ack() == 0)
        return;

    //读取数据
    for (i = 0; i < 5; i++)
        buf[i] = thd11_read_byte();

    //计算温度和湿度值
    *humidity = buf[0];
    *temperature = buf[2];
}

请注意，本代码仅作为参考，具体实现方式需要根据您的具体需求进行修改。