基于stm32f103r6的dht11的温湿度检测的代码及头h文件和c文件

以下是基于STM32F103R6的DHT11温湿度检测的代码、头文件和C文件。请注意，这是一个简单的示例，您需要根据您的具体硬件和需求进行适当的修改。

main.c：

#include "stm32f10x.h"
#include "dht11.h"

int main(void)
{
    uint8_t temp, humi;
    SysTick_Init();
    DHT11_Init();
    while(1)
    {
        DHT11_Read_Data(&temp, &humi);
        // 处理温湿度数据
    }
}

void SysTick_Init(void)
{
    if(SysTick_Config(SystemCoreClock / 1000))
    {
        while(1);
    }
}

void SysTick_Handler(void)
{
    TimingDelay_Decrement();
}

void Delay_ms(uint32_t nTime)
{
    TimingDelay = nTime;
    while(TimingDelay != 0);
}

dht11.h：

#ifndef __DHT11_H
#define __DHT11_H

#include "stm32f10x.h"

// DHT11引脚定义
#define DHT11_PIN   GPIO_Pin_8
#define DHT11_PORT  GPIOB

// 函数声明
void DHT11_Init(void);
void DHT11_Start(void);
uint8_t DHT11_Check_Response(void);
uint8_t DHT11_Read_Byte(void);
void DHT11_Read_Data(uint8_t *temp, uint8_t *humi);

#endif

dht11.c：

#include "dht11.h"

uint32_t TimingDelay;

void DHT11_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    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_ms(1000); // 等待1秒钟
}

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_ResetBits(DHT11_PORT, DHT11_PIN);
    Delay_ms(18); // 至少18ms
    GPIO_SetBits(DHT11_PORT, DHT11_PIN);
}

uint8_t DHT11_Check_Response(void)
{
    uint8_t Response = 0;
    uint32_t TimeOut = 0;

    GPIO_InitTypeDef GPIO_InitStructure;
    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);

    while(GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
    {
        TimeOut++;
        Delay_ms(1);
        if(TimeOut > 100)
        {
            Response = 1;
            break;
        }
    }

    TimeOut = 0;

    while(!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
    {
        TimeOut++;
        Delay_ms(1);
        if(TimeOut > 100)
        {
            Response = 1;
            break;
        }
    }

    TimeOut = 0;

    while(GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
    {
        TimeOut++;
        Delay_ms(1);
        if(TimeOut > 100)
        {
            Response = 1;
            break;
        }
    }

    return Response;
}

uint8_t DHT11_Read_Byte(void)
{
    uint8_t i, j, byte = 0;

    for(j = 0; j < 8; j++)
    {
        while(!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)); // 等待高电平
        Delay_ms(40); // 40us
        if(GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN))
        {
            byte |= (1 << (7 - j));
        }

        while(GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)); // 等待低电平
    }

    return byte;
}

void DHT11_Read_Data(uint8_t *temp, uint8_t *humi)
{
    uint8_t i, data[5], check_sum;

    DHT11_Start();

    if(DHT11_Check_Response() == 1)
    {
        *temp = 0;
        *humi = 0;
        return;
    }

    for(i = 0; i < 5; i++)
    {
        data[i] = DHT11_Read_Byte();
    }

    check_sum = data[0] + data[1] + data[2] + data[3];

    if(check_sum != data[4])
    {
        *temp = 0;
        *humi = 0;
        return;
    }

    *humi = data[0];
    *temp = data[2];
}

希望这个示例能对您有所帮助！