通过Proteus软件仿真51单片机温湿度传感器测温实验,并在OLED中显示,保留小数点后三位

好的，我理解了你的问题。为了在Proteus中仿真51单片机温湿度传感器测温实验，并在OLED中显示保留小数点后三位的温度值，我们需要进行以下步骤：

1. 选择合适的51单片机模块和温湿度传感器模块，并将它们连接起来。常见的温湿度传感器模块有DHT11、DHT22、AM2302等，这里我们以DHT11为例进行说明。

2. 创建一个新的Proteus工程，并将选好的51单片机模块和DHT11传感器模块添加到工程中。然后，将它们的引脚连接起来，具体参考单片机和传感器模块的datasheet。

3. 在51单片机中编写程序，读取DHT11传感器的温湿度数据，并将温度值保留小数点后三位后显示在OLED屏幕上。以下是一个简单的程序示例：

#include <reg51.h>
#include <dht11.h>
#include <i2c.h>

#define OLED_ADDR 0x78

void delay(unsigned int t)
{
    unsigned int i, j;
    for (i = t; i > 0; i--)
        for (j = 110; j > 0; j--);
}

void start_i2c()
{
    SDA = 1;
    delay(1);
    SCL = 1;
    delay(1);
    SDA = 0;
    delay(1);
    SCL = 0;
    delay(1);
}

void stop_i2c()
{
    SDA = 0;
    delay(1);
    SCL = 1;
    delay(1);
    SDA = 1;
    delay(1);
}

void write_i2c(unsigned char dat)
{
    unsigned char i;
    for (i = 0; i < 8; i++)
    {
        SDA = dat & 0x80;
        dat <<= 1;
        delay(1);
        SCL = 1;
        delay(1);
        SCL = 0;
        delay(1);
    }
}

void write_cmd(unsigned char cmd)
{
    start_i2c();
    write_i2c(OLED_ADDR);
    write_i2c(0x00);
    write_i2c(cmd);
    stop_i2c();
}

void write_dat(unsigned char dat)
{
    start_i2c();
    write_i2c(OLED_ADDR);
    write_i2c(0x40);
    write_i2c(dat);
    stop_i2c();
}

void init_oled()
{
    write_cmd(0xAE);
    write_cmd(0x20);
    write_cmd(0x10);
    write_cmd(0xB0);
    write_cmd(0xC8);
    write_cmd(0x00);
    write_cmd(0x10);
    write_cmd(0x40);
    write_cmd(0x81);
    write_cmd(0xFF);
    write_cmd(0xA1);
    write_cmd(0xA6);
    write_cmd(0xA8);
    write_cmd(0x3F);
    write_cmd(0xAD);
    write_cmd(0x8B);
    write_cmd(0xD5);
    write_cmd(0x62);
    write_cmd(0xD9);
    write_cmd(0xF1);
    write_cmd(0xDA);
    write_cmd(0x12);
    write_cmd(0xDB);
    write_cmd(0x40);
    write_cmd(0x20);
    write_cmd(0x02);
    write_cmd(0xAF);
}

void display_temp(float temp)
{
    int integer = (int)temp;
    int decimal = (int)((temp - integer) * 1000);
    write_cmd(0x21);
    write_cmd(0x00);
    write_cmd(0x7F);
    write_cmd(0x22);
    write_cmd(0x00);
    write_cmd(0x3F);
    write_dat('T');
    write_dat('e');
    write_dat('m');
    write_dat('p');
    write_dat(':');
    write_dat(integer / 100 + 0x30);
    write_dat(integer / 10 % 10 + 0x30);
    write_dat('.');
    write_dat(decimal / 100 + 0x30);
    write_dat(decimal / 10 % 10 + 0x30);
    write_dat(decimal % 10 + 0x30);
    write_dat('C');
}

void main()
{
    float temperature;
    unsigned char chk;
    init_i2c();
    init_oled();
    while (1)
    {
        chk = dht11_read(1, &temperature, NULL);
        if (chk == DHT11_OK)
        {
            display_temp(temperature);
        }
        delay(2000);
    }
}

上述代码使用了dht11库和i2c库，需要先在Keil C51中安装这两个库。程序中首先进行了硬件和库的初始化操作。然后在循环中读取DHT11传感器的温度数据，将温度值保留小数点后三位后显示在OLED屏幕上。其中保留小数点后三位的方法为在display_temp()函数中将温度值分解为整数部分和小数部分，然后分别显示。

希望这个示例程序能够帮助你完成Proteus仿真51单片机温湿度传感器测温实验，并在OLED中显示保留小数点后三位的温度值。