STM32基于STM32-HAL工程读取DHT11/DHT22/AM2302/AM2301

STM32基于STM32-HAL工程读取DHT11/DHT22/AM2302/AM2301

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• ✨申明：本文章仅发表在CSDN网站，任何其他网站，未注明来源，见此内容均为盗链和爬取，请多多尊重和支持原创!
• 对于文中所提供的相关资源链接将作不定期更换。
• DHT11/DHT22 HAL外设驱动文件 来源：https://github.com/quen0n/DHT11-DHT22-STM32-HAL

✨以下是对开源库内容的翻译，俄语翻译中文。如果能看的懂俄语，就直接去看原文。

• 工程只使用了DHT11验证了使用该库可以正常读取到数据，至于其他传感器没有做测试。
  

⛳驱动库介绍

• ✨使用HAL的STM32驱动DHT22 / DHT2302 / AM2301 / AM32传感器的最佳简单库。

功能说明

• DHT11/DHT22/AM2302/AM2301 传感器支持
• 自动校验和验证
• 无需定时器或中断
• 能够轮询多个传感器
• DHT11 的自动 0.5KHz 轮询速率控制和 DHT2 的 1KHz 轮询速率控制，能够打开内部上拉电阻（无需捆绑即可与传感器配合使用）

✅使用方法

• 在 STM32CubeMX 中配置项目。配置传感器连接到的端口以进行输入,生成项目。
• ⚡将两者复制到项目文件夹并相应地复制。如有必要，请将文件连接到 IDE。DHT.h和DHT.c分别拷贝到 Inc文件夹 和Src文件夹下。
• 创建一个类型变量，指定端口、传感器类型，
• 如果传感器没有外部上拉电路，则启用上拉。DHT11_sensor
  

若要从传感器检索数据，请通过在附件中指定传感器变量进行调用。DHT_getData()

• 示例：DHT11 传感器输出至 UART，无需小数部分

#include "DHT.h"
#include 
#include 
...
int main(void) {
  ...
  //Создание объекта дачика DHT11, подключенного к PB4, подтяжка линии данных выключена  
  static DHT_sensor livingRoom = {GPIOB, GPIO_PIN_4, DHT11, GPIO_NOPULL};
  ...
  while(1) {
    //Буффер для печати текста
    char msg[40]; 
    //Получение данных с датчика
    DHT_data d = DHT_getData(&livingRoom); 
    //Печать данных в буффер
    sprintf(msg, "\fLiving room: Temp %d°C, Hum %d%%", (uint8_t)d.temp, (uint8_t)d.hum);
    //Отправка текста в UART
    HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), 0xFF);
  }
}

• 示例：DHT22传感器数据输出到UART，带软件数据线拧紧

#include "DHT.h"
#include 
#include 
...
int main(void) {
  ...
  //Создание объекта дачика DHT22, подключенного к PC1, подтяжка линии данных включена  
  static DHT_sensor bedRoom = {GPIOC, GPIO_PIN_1, DHT22, GPIO_PULLUP};
  ...
  while(1) {
    //Буффер для печати текста
    char msg[40]; 
    //Получение данных с датчика
    DHT_data d = DHT_getData(&bedRoom); 
    //Печать данных в буффер
    sprintf(msg, "\fBed room: Temp %2.1f°C, Hum %2.1f%%", d.temp, d.hum);
    //Отправка текста в UART
    HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), 0xFF);
  }
}

• 示例：将 DHT11 和 DHT22 传感器数据输出到 UART

#include "DHT.h"
#include 
#include 
...
int main(void) {
  ...
  DHT_sensor livingRoom = {GPIOB, GPIO_PIN_4, DHT11, GPIO_NOPULL};
  DHT_sensor bedRoom = {GPIOC, GPIO_PIN_1, DHT22, GPIO_PULLUP};
  ...
  while(1) {
    //Буффер для печати текста
    char msg[40];
    //Получение данных с датчика DHT11
    DHT_data d = DHT_getData(&livingRoom);
    //Печать данных в буффер
    sprintf(msg, "\fLiving room: Temp %d°C, Hum %d%%\r\n", (uint8_t)d.temp, (uint8_t)d.hum);
    //Отправка текста в UART
    HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), 0xFF);
    //Получение данных с датчика DHT22
    d = DHT_getData(&bedRoom);
    //Печать данных в буффер
    sprintf(msg, "Bed room: Temp %2.1f°C, Hum %2.1f%%", d.temp, d.hum);
    //Отправка текста в UART
    HAL_UART_Transmit(&huart2, (uint8_t*)msg, strlen(msg), 0xFF);
  }
}

• 为什么以及何时需要启用数据线提升？
  答：MCU 和 DHT11/DHT22 端口在开路模式下运行，因此数据线需要电源提升。如果您使用的是没有任何捆绑带的裸传感器，则通过指定GPIO_PULLUP打开微控制器的内部上拉电阻。

STM32基于STM32CubeMX配置工程

• 只需配置一个串口即可。
  
• usart.c文件中添加printf重映射，并在Keil设置中勾选MicroLib选项。

#include "stdio.h"
/*可调用printf*/
int fputc(int ch,FILE *f)
{
    /*&huart1指的是串口1，如果用别的串口就修改数字*/
    HAL_UART_Transmit(&huart1 , (uint8_t *)&ch , 1 , 1000);
    return ch;
}

• main主程序代码

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
//#include "dht11.h"
#include "dht.h"
#include "DHT.h"

#include 
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
    /* USER CODE BEGIN 1 */

//    char msg[40];
    /* USER CODE END 1 */

    /* MCU Configuration--------------------------------------------------------*/

    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();

    /* USER CODE BEGIN Init */

    /* USER CODE END Init */

    /* Configure the system clock */
    SystemClock_Config();

    /* USER CODE BEGIN SysInit */

    /* USER CODE END SysInit */

    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_USART1_UART_Init();
    /* USER CODE BEGIN 2 */
    uint32_t TimerUART = HAL_GetTick();

    static DHT_sensor livingRoom = {GPIOA, GPIO_PIN_8, DHT11, GPIO_NOPULL};//指定DHT数据引脚
    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    {
        /* USER CODE END WHILE */

        /* USER CODE BEGIN 3 */
        if ((HAL_GetTick() - TimerUART) > 1000)
        {
            
            DHT_data d = DHT_getData(&livingRoom);//传感器数据接收
            //缓冲数据打印
            //    sprintf(msg, "\fLiving room: Temp %d°C, Hum %d%%", (uint8_t)d.temp, (uint8_t)d.hum);
            //将文本发送到UART
            //    HAL_UART_Transmit(&huart1, (uint8_t *)msg, strlen(msg), 0xFF);
            printf("Temp:%d°C, Hum %d%% \r\n", (uint8_t)d.temp, (uint8_t)d.hum);
            TimerUART = HAL_GetTick();
            HAL_GPIO_TogglePin(GPIOE, LED_Pin);
        }


    }
    /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.HSIState = RCC_HSI_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }

    /** Initializes the CPU, AHB and APB buses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                                  | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        Error_Handler();
    }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */
    __disable_irq();
    while (1)
    {
    }
    /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
    /* USER CODE BEGIN 6 */
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

工程源码

• ✨申明：本文章仅发表在CSDN网站，任何其他网站，未注明来源，见此内容均为盗链和爬取，请多多尊重和支持原创!
• 对于文中所提供的相关资源链接将作不定期更换。

链接: https://pan.baidu.com/s/1mg5vlwe8ymY8Ism2MRDE-w
提取码: qxxe