dht11温湿度传感器stm32f103c8t6 代码

下面是使用STM32F103C8T6和DHT11温湿度传感器的示例代码：

#include "stm32f10x.h"
#include <stdio.h>

#define DHT11_PIN GPIO_Pin_0
#define DHT11_PORT GPIOB

void Delay_us(uint32_t microseconds)
{
    microseconds *= (SystemCoreClock / 1000000) / 5;
    while (microseconds--)
    {
        __NOP();
        __NOP();
        __NOP();
        __NOP();
        __NOP();
    }
}

void DHT11_Start(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = DHT11_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DHT11_PORT, &GPIO_InitStructure);

    GPIO_SetBits(DHT11_PORT, DHT11_PIN);
    Delay_us(1000);
    GPIO_ResetBits(DHT11_PORT, DHT11_PIN);
    Delay_us(18000);
    GPIO_SetBits(DHT11_PORT, DHT11_PIN);
    Delay_us(40);

    GPIO_InitStructure.GPIO_Pin = DHT11_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DHT11_PORT, &GPIO_InitStructure);
}

void DHT11_Check_Response(void)
{
    while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
        ;
    while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
        ;
    while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
        ;
}

uint8_t DHT11_Read(void)
{
    uint8_t i, j;
    uint8_t data = 0;

    for (j = 0; j < 8; j++)
    {
        while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
            ;
        Delay_us(40);
        if (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
        {
            data |= (1 << (7 - j));
        }
        while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
            ;
    }
    return data;
}

int main(void)
{
    uint8_t Humidity, Temperature;
    char buffer[20];

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    while (1)
    {
        DHT11_Start();
        DHT11_Check_Response();
        Humidity = DHT11_Read();
        DHT11_Read();
        Temperature = DHT11_Read();
        DHT11_Read();
        DHT11_Read();

        sprintf(buffer, "Humidity: %d.%d %%\n", Humidity / 10, Humidity % 10);
        printf(buffer);
        sprintf(buffer, "Temperature: %d.%d C\n\n", Temperature / 10, Temperature % 10);
        printf(buffer);

        Delay_us(2000000);
    }
}

在这个例子中，使用PB0作为DHT11的数据引脚。代码通过设置GPIO引脚的输入和输出模式来控制DHT11的通信。它使用延迟函数来生成所需的时间间隔，并从DHT11读取温度和湿度数据。最后，将温度和湿度值格式化为字符串并打印到终端上。

请注意，此代码仅供参考，您可能需要根据自己的硬件配置进行修改。