基于stm32的温湿度检测代码

以下是基于STM32的温湿度检测代码的示例：

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

GPIO_InitTypeDef GPIO_InitStructure;

int main(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    DHT11_Init();

    while(1)
    {
        uint8_t temp, humi;
        if(DHT11_Read_TempAndHumidity(&temp, &humi) == SUCCESS)
        {
            printf("Temperature: %d°C, Humidity: %d%%\n", temp, humi);
        }
        else
        {
            printf("Failed to read temperature and humidity\n");
        }
        Delay_ms(2000);
    }
}

void Delay_us(uint32_t us)
{
    uint32_t i;
    for(i = 0; i < us; i++)
    {
        asm("NOP");
    }
}

void Delay_ms(uint32_t ms)
{
    uint32_t i;
    for(i = 0; i < ms; i++)
    {
        Delay_us(1000);
    }
}

void DHT11_Init(void)
{
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void DHT11_Set_Mode(uint8_t mode)
{
    if(mode == DHT11_MODE_OUTPUT)
    {
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    }
    else
    {
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
    }
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

uint8_t DHT11_Read_Bit(void)
{
    while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_RESET);

    Delay_us(40);
    if(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_SET)
    {
        while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_SET);
        return 1;
    }
    else
    {
        while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_RESET);
        return 0;
    }
}

uint8_t DHT11_Read_Byte(void)
{
    uint8_t i;
    uint8_t data = 0;
    for(i = 0; i < 8; i++)
    {
        data <<= 1;
        data |= DHT11_Read_Bit();
    }
    return data;
}

uint8_t DHT11_Read_TempAndHumidity(uint8_t* temp, uint8_t* humi)
{
    uint8_t data[5];
    uint8_t i;

    DHT11_Set_Mode(DHT11_MODE_OUTPUT);
    GPIO_ResetBits(GPIOA, GPIO_Pin_0);
    Delay_ms(18);
    GPIO_SetBits(GPIOA, GPIO_Pin_0);
    Delay_us(40);
    DHT11_Set_Mode(DHT11_MODE_INPUT);

    if(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_RESET)
    {
        while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_RESET);
        while(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_SET);
        for(i = 0; i < 5; i++)
        {
            data[i] = DHT11_Read_Byte();
        }
        if(data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF))
        {
            *humi = data[0];
            *temp = data[2];
            return SUCCESS;
        }
        else
        {
            return FAILURE;
        }
    }
    else
    {
        return FAILURE;
    }
}

这个示例使用了DHT11温湿度传感器。在主函数中，不断读取温度和湿度并打印出来。```DHT11_Init```函数用于初始化GPIO，```DHT11_Set_Mode```函数用于设置GPIO的输入/输出模式，```DHT11_Read_Bit```函数用于读取一个位，```DHT11_Read_Byte```函数用于读取一个字节，```DHT11_Read_TempAndHumidity```函数用于读取温湿度数据。```Delay_us```和```Delay_ms```函数用于延时。