標(biāo)題: stm32 DHT11數(shù)字溫濕度傳感器源程序 [打印本頁(yè)]
作者: 51mk    時(shí)間: 2019-11-3 22:11
標(biāo)題: stm32 DHT11數(shù)字溫濕度傳感器源程序
附件是DHT1的溫濕度傳感器代碼 分享給大家1、首先 將USB轉(zhuǎn)串口與開(kāi)發(fā)板相連，如圖，再與電腦相連
2、將DHT11模塊插入開(kāi)發(fā)板
3、打開(kāi)串口助手，設(shè)置波特率為115200，下載DHT11程序后可以看。


單片機(jī)源程序如下:
  1. /* Includes ------------------------------------------------------------------*/
  2. #include "main.h"
  3. #include "stm32l4xx_hal.h"
  4. #include "usart.h"
  5. #include "gpio.h"
  6. #include "dht11.h"

  8. /* USER CODE BEGIN Includes */

  10. /* USER CODE END Includes */

  12. /* Private variables ---------------------------------------------------------*/

  14. /* USER CODE BEGIN PV */
  15. /* Private variables ---------------------------------------------------------*/

  17. /* USER CODE END PV */

  19. /* Private function prototypes -----------------------------------------------*/
  20. void SystemClock_Config(void);

  22. /* USER CODE BEGIN PFP */
  23. /* Private function prototypes -----------------------------------------------*/

  25. /* USER CODE END PFP */

  27. /* USER CODE BEGIN 0 */

  29. /* USER CODE END 0 */

  31. /**
  32.   * @brief  The application entry point.
  33.   *
  34.   * @retval None
  35.   */
  36. int main(void)
  37. {
  38.   /* USER CODE BEGIN 1 */
  39.         uint8_t str[] = "dht11 test\r\n";
  40.         DHT11_Data_TypeDef dht11;
  41.   /* USER CODE END 1 */

  43.   /* MCU Configuration----------------------------------------------------------*/

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

  48.   /* USER CODE BEGIN Init */

  50.   /* USER CODE END Init */

  52.   /* Configure the system clock */
  53.   SystemClock_Config();

  55.   /* USER CODE BEGIN SysInit */

  57.   /* USER CODE END SysInit */

  59.   /* Initialize all configured peripherals */
  60.   MX_GPIO_Init();
  61.   MX_USART1_UART_Init();
  62.   /* USER CODE BEGIN 2 */
  63.         HAL_UART_Transmit(&huart1, str, 12,100);
  64.         DHT11_Init();
  65.        
  66.   /* USER CODE END 2 */

  68.   /* Infinite loop */
  69.   /* USER CODE BEGIN WHILE */
  70.   while (1)
  71.   {

  73.   /* USER CODE END WHILE */
  74.                 DHT11_Read_TempAndHumidity(&dht11);
  75.                 printf("temp = %.2f ; humi = %.2f\r\n",dht11.temperature,dht11.humidity);
  76.                 HAL_Delay(3000);
  77.   /* USER CODE BEGIN 3 */

  79.   }
  80.   /* USER CODE END 3 */

  82. }

  84. /**
  85.   * @brief System Clock Configuration
  86.   * @retval None
  87.   */
  88. void SystemClock_Config(void)
  89. {

  91.   RCC_OscInitTypeDef RCC_OscInitStruct;
  92.   RCC_ClkInitTypeDef RCC_ClkInitStruct;
  93.   RCC_PeriphCLKInitTypeDef PeriphClkInit;

  95.     /**Initializes the CPU, AHB and APB busses clocks
  96.     */
  97.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
  98.   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
  99.   RCC_OscInitStruct.MSICalibrationValue = 0;
  100.   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
  101.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  102.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
  103.   RCC_OscInitStruct.PLL.PLLM = 1;
  104.   RCC_OscInitStruct.PLL.PLLN = 40;
  105.   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
  106.   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  107.   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  108.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  109.   {
  110.     _Error_Handler(__FILE__, __LINE__);
  111.   }

  113.     /**Initializes the CPU, AHB and APB busses clocks
  114.     */
  115.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
  116.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  117.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  118.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  119.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  120.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  122.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
  123.   {
  124.     _Error_Handler(__FILE__, __LINE__);
  125.   }

  127.   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;
  128.   PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
  129.   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  130.   {
  131.     _Error_Handler(__FILE__, __LINE__);
  132.   }

  134.     /**Configure the main internal regulator output voltage
  135.     */
  136.   if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
  137.   {
  138.     _Error_Handler(__FILE__, __LINE__);
  139.   }

  141.     /**Configure the Systick interrupt time
  142.     */
  143.   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  145.     /**Configure the Systick
  146.     */
  147.   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  149.   /* SysTick_IRQn interrupt configuration */
  150.   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
  151. }

  153. /* USER CODE BEGIN 4 */

  155. /* USER CODE END 4 */

  157. /**
  158.   * @brief  This function is executed in case of error occurrence.
  159.   * @param  file: The file name as string.
  160.   * @param  line: The line in file as a number.
  161.   * @retval None
  162.   */
  163. void _Error_Handler(char *file, int line)
  164. {
  165.   /* USER CODE BEGIN Error_Handler_Debug */
  166.   /* User can add his own implementation to report the HAL error return state */
  167.   while(1)
  168.   {
  169.   }
  170.   /* USER CODE END Error_Handler_Debug */
  171. }

  173. #ifdef  USE_FULL_ASSERT
  174. /**
  175.   * @brief  Reports the name of the source file and the source line number
  176.   *         where the assert_param error has occurred.
  177.   * @param  file: pointer to the source file name
  178.   * @param  line: assert_param error line source number
  179.   * @retval None
  180.   */
  181. void assert_failed(uint8_t* file, uint32_t line)
  182. {
  183.   /* USER CODE BEGIN 6 */
  184.   /* User can add his own implementation to report the file name and line number,
  185.      tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  186.   /* USER CODE END 6 */
  187. }
  188. #endif /* USE_FULL_ASSERT */

  190. /**
  191.   * @}
  192.   */

  194. /**
  195.   * @}
  196.   */

  198. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
復(fù)制代碼

所有資料51hei提供下載:
DHT11.7z (3.95 MB, 下載次數(shù): 73)


作者: WFX777888    時(shí)間: 2019-12-2 16:49

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