帮我生成dht11的驱动代码

你好，我可以为您生成 DHT11 的驱动代码。以下是示例代码：

#include <dht11.h>

dht11 DHT11;

void setup() {
Serial.begin(960);
}

void loop() {
int chk = DHT11.read(7); // 读取 DHT11 传感器数据，引脚为 7
Serial.print("Humidity (%): ");
Serial.println(DHT11.humidity);
Serial.print("Temperature (°C): ");
Serial.println(DHT11.temperature);
delay(200); // 2 秒后再次读取数据
}

希望这可以帮助到您。

相关问题

生成驱动DHT11的C语言代码

以下是一个基于STM32F4的C语言代码示例，用于驱动DHT11传感器：

#include "stm32f4xx.h"
#include "dht11.h"

void delay_us(uint32_t us)
{
    uint32_t count = us * (SystemCoreClock / 1000000) / 3;
    while (count--);
}

void DHT11_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_SetBits(GPIOA, GPIO_Pin_0);
    delay_us(1000);
}

uint8_t DHT11_Read_Byte(void)
{
    uint8_t i, j, byte = 0;
    for (j = 0; j < 8; j++)
    {
        while (!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));
        delay_us(40);
        if (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == 0)
        {
            byte &= ~(1 << (7 - j));
        }
        else
        {
            byte |= (1 << (7 - j));
            while (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));
        }
    }
    return byte;
}

DHT11_Data_TypeDef DHT11_Read_Data(void)
{
    DHT11_Data_TypeDef dht11_data;
    uint8_t i, checksum;

    GPIO_ResetBits(GPIOA, GPIO_Pin_0);
    delay_us(18000);

    GPIO_SetBits(GPIOA, GPIO_Pin_0);
    delay_us(30);

    GPIO_ResetBits(GPIOA, GPIO_Pin_0);
    delay_us(40);

    GPIO_SetBits(GPIOA, GPIO_Pin_0);

    while (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));

    while (!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));

    while (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0));

    dht11_data.humidity = DHT11_Read_Byte();
    dht11_data.temperature = DHT11_Read_Byte();
    checksum = DHT11_Read_Byte();

    GPIO_SetBits(GPIOA, GPIO_Pin_0);

    if (checksum == (dht11_data.temperature + dht11_data.humidity))
    {
        return dht11_data;
    }
    else
    {
        dht11_data.humidity = 0;
        dht11_data.temperature = 0;
        return dht11_data;
    }
}

该代码使用了STM32F4的GPIO口控制DHT11传感器，并使用delay_us函数等待DHT11的响应。在读取温湿度数据时，先发送起始信号，然后通过读取DHT11传感器的响应数据，计算出温度和湿度，并验证校验和。最后，返回温湿度数据结构体。

生成stm32的DHT11代码

以下是基于STM32 HAL库的DHT11驱动代码示例：

#include "stm32f4xx_hal.h"

#define DHT11_PORT GPIOA
#define DHT11_PIN GPIO_PIN_0

void delay_us(uint32_t us)
{
    uint32_t count = us * (SystemCoreClock / 1000000) / 5;
    while(count--);
}

void DHT11_Start(void)
{
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_RESET);
    delay_us(18000);
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_SET);
    delay_us(20);
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_RESET);
}

uint8_t DHT11_Check(void)
{
    uint8_t response = 1;
    uint16_t count = 0;
    while(HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN) == GPIO_PIN_SET)
    {
        count++;
        if(count > 10000)
        {
            response = 0;
            break;
        }
    }
    return response;
}

uint8_t DHT11_Read_Bit(void)
{
    uint8_t response = 1;
    uint16_t count = 0;
    while(HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN) == GPIO_PIN_RESET)
    {
        count++;
        if(count > 10000)
        {
            response = 0;
            break;
        }
    }
    delay_us(40);
    if(HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN) == GPIO_PIN_SET)
    {
        response = 1;
    }
    else
    {
        response = 0;
    }
    count = 0;
    while(HAL_GPIO_ReadPin(DHT11_PORT, DHT11_PIN) == GPIO_PIN_SET)
    {
        count++;
        if(count > 10000)
        {
            response = 0;
            break;
        }
    }
    return response;
}

uint8_t DHT11_Read_Byte(void)
{
    uint8_t i, temp = 0;
    for(i = 0; i < 8; i++)
    {
        temp |= (DHT11_Read_Bit() << (7 - i));
    }
    return temp;
}

uint8_t DHT11_Read_Data(uint8_t *humidity, uint8_t *temperature)
{
    uint8_t response = 0;
    uint8_t buffer[5];
    DHT11_Start();
    if(DHT11_Check() == 0)
    {
        response = 1;
        buffer[0] = DHT11_Read_Byte();
        buffer[1] = DHT11_Read_Byte();
        buffer[2] = DHT11_Read_Byte();
        buffer[3] = DHT11_Read_Byte();
        buffer[4] = DHT11_Read_Byte();
        if(buffer[4] == (buffer[0] + buffer[1] + buffer[2] + buffer[3]))
        {
            *humidity = buffer[0];
            *temperature = buffer[2];
        }
        else
        {
            response = 2;
        }
    }
    return response;
}

使用方法：

1. 在`main.c`文件中添加上述代码。
2. 在`main`函数中调用`DHT11_Read_Data`函数，读取温湿度数据。

示例代码：

#include "stm32f4xx_hal.h"

uint8_t humidity, temperature;

int main(void)
{
    HAL_Init();
    /* 初始化GPIO */
    GPIO_InitTypeDef GPIO_InitStruct;
    __HAL_RCC_GPIOA_CLK_ENABLE();
    GPIO_InitStruct.Pin = DHT11_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(DHT11_PORT, &GPIO_InitStruct);
    HAL_GPIO_WritePin(DHT11_PORT, DHT11_PIN, GPIO_PIN_RESET);

    /* 读取温湿度数据 */
    uint8_t response = DHT11_Read_Data(&humidity, &temperature);
    if(response == 0)
    {
        /* 温湿度数据读取成功 */
        printf("湿度：%d%%，温度：%d℃\n", humidity, temperature);
    }
    else if(response == 1)
    {
        /* DHT11无响应 */
        printf("DHT11无响应\n");
    }
    else if(response == 2)
    {
        /* 校验和错误 */
        printf("校验和错误\n");
    }
    while(1);
}