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一、前言
本项目是基于 STM32 开发板的温湿度采集,传感器采用 DHT11 温传感器,软件采用 keil5 等。 -M4系列的芯片,芯片STM32F407ZGT6开发板进行项目开发。传感器将采集到的数据传输到STM32(MCU)主控进行数据处理,最后通过串口打印出来。 二 、硬件准备1、硬件准备
keil5: 官方链接:http://www.keil.com/demo/eval/arm.htm STM32f407 官方链接:http://www.keil.com/dd2/pack STM32CudeMx 官方链接:http://www.st.com/web/en/catalog/tools/PF259242 STM32CudeMx的f407软件包: 官方链接:http://www.st.com/web/en/catalog/tools/PF259243 3、项目实施 1,keil5安装 安装请参照链接:keil5安装链接 2,STM32CudeMx安装 安装请参照链接:STM32CudeMx安装 3,BSP工程项目创建³³ ①打开STM32CudeMX ②点击创建工程(ACCESS TO MCU SELECTOR) ③搜索STM32F407ZG,双击绿色区域 ④点击Categor→System Core→GPIO,选择PF9和PF10,都选择为GPIO_OutPut方式 ⑤对PF9和PF10的GPIO进行具体配置 ⑥配置RCC⑦ 配置系统 ⑧这里以串口1我们可以选择串口的模式(异步,同步,半双工)串口接收中断 a)点击USATR1 b)设置MODE为异步通信(异步) c基础参数:波特率为115200 Bits /s。传输数据长度为8 Bit。奇偶检验位1接收和发送使能 d)GPIO/停止设置USART1_USART_TX )NVIC设置一栏使能接收中断 ⑨配置STM32F07ZGT6的树,因为是外部8M的晶振,所以相认一下的时钟树 a)选择外部目录HSE 8MHz b)PLL锁环倍频168倍 c)系统时钟来源选择PLL d)设置APB1分频器为/4 ⑩建立工程 4. BSP工程项目 ①用keil5打开此工程 ②点击option(魔法棒),然后进行主频配置,修改为8.0或12.0,然后重新打开该工程进行检查,最后进行编译。 ③在keil5上面创建系统和HARDWAVE两一个文件夹 ④回到创建开始的STM32_DHT11工程目录,添加这两个文件夹,复制库文件里面SYSTEM和HARDWAVE两个文件夹到STM32_DHT11工程目录下。(文件具体看清楚) ⑤回到keil5里面,继续点击那个文件管理,然后根据对应的文件夹添加文件,把SYSTEM和HARDWAVE两个文件夹里面的文件都添加进去。 ⑥配置头文件路径,选择为第4步已经复制的两个文件夹(SYSTEM和HARDWAVE)的路径添加进去。 ⑦编程代码 将资源中的main.c、uart.c和uart.h的代码复制替换。工程中的相应的代码然后就可以编译了 main.c中代码如下: #include "main.h" #include "usart.h" #include "gpio.h" #include "stdio.h" #include "sys.h" #include "delay.h" #include "usart.h" #include "dht11.h" void SystemClock_Config(void); int main(void) { u8 t=0; u8 temperature; u8 humidity; int times; HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ delay_init(168); SystemClock_Config(); DHT11_Init(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART1_UART_Init(); HAL_UART_Receive_IT(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE); while (1) { if(t%10==0)//?100ms???? { DHT11_Read_Data(&temperature,&humidity); printf("2018A14122 WuXiaoXianrn"); printf("Tem:%drn",temperature); printf("Hum:%drn",humidity); printf("rnn"); } delay_ms(100); t++; } } /** * @brief System Clock Configuration * @retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Configure the main internal regulator output voltage */ __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); /** 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.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 4; RCC_OscInitStruct.PLL.PLLN = 168; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 4; 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_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { Error_Handler(); } } 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 %drn", file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ #include "usart.h" #include "stdio.h" /* USER CODE BEGIN 0 */ uint8_t USART_RX_BUF[USART_REC_LEN]; uint16_t USART_RX_STA=0; //?????? uint8_t aRxBuffer[RXBUFFERSIZE];//HAL?????????? /* USER CODE END 0 */ UART_HandleTypeDef huart1; /* USART1 init function */ int fputc(int ch, FILE *f) { HAL_UART_Transmit(&huart1,(uint8_t *)&ch, 1, 0XFFFF); return ch; } void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) { if(huart->Instance==USART1)//?????1 { if((USART_RX_STA&0x8000)==0)//????? { if(USART_RX_STA&0x4000) //????0x0d { if(aRxBuffer[0]!= 0x0a) { USART_RX_STA=0; //????,???? } else { USART_RX_STA|=0x8000; //????? } } else //????0x0D { if(aRxBuffer[0] == 0x0d) { USART_RX_STA|=0x4000; } else { USART_RX_BUF[USART_RX_STA&0x3FFF]=aRxBuffer[0]; USART_RX_STA++; if(USART_RX_STA>(USART_REC_LEN-1)) { USART_RX_STA=0; //??????,?????? } } } } } } void MX_USART1_UART_Init(void) { /* USER CODE BEGIN USART1_Init 0 */ /* USER CODE END USART1_Init 0 */ /* USER CODE BEGIN USART1_Init 1 */ /* USER CODE END USART1_Init 1 */ huart1.Instance = USART1; huart1.Init.BaudRate = 115200; huart1.Init.WordLength = UART_WORDLENGTH_8B; huart1.Init.StopBits = UART_STOPBITS_1; huart1.Init.Parity = UART_PARITY_NONE; huart1.Init.Mode = UART_MODE_TX_RX; huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; huart1.Init.OverSampling = UART_OVERSAMPLING_16; if (HAL_UART_Init(&huart1) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN USART1_Init 2 */ /* USER CODE END USART1_Init 2 */ } void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(uartHandle->Instance==USART1) { /* USER CODE BEGIN USART1_MspInit 0 */ /* USER CODE END USART1_MspInit 0 */ /* USART1 clock enable */ __HAL_RCC_USART1_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /**USART1 GPIO Configuration PA9 ------> USART1_TX PA10 ------> USART1_RX */ GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_NOPULL; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; GPIO_InitStruct.Alternate = GPIO_AF7_USART1; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); /* USART1 interrupt Init */ HAL_NVIC_SetPriority(USART1_IRQn, 0, 0); HAL_NVIC_EnableIRQ(USART1_IRQn); /* USER CODE BEGIN USART1_MspInit 1 */ /* USER CODE END USART1_MspInit 1 */ } } void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle) { if(uartHandle->Instance==USART1) { /* USER CODE BEGIN USART1_MspDeInit 0 */ /* USER CODE END USART1_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_USART1_CLK_DISABLE(); /**USART1 GPIO Configuration PA9 ------> USART1_TX PA10 ------> USART1_RX */ HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10); /* USART1 interrupt Deinit */ HAL_NVIC_DisableIRQ(USART1_IRQn); /* USER CODE BEGIN USART1_MspDeInit 1 */ /* USER CODE END USART1_MspDeInit 1 */ } } /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ /** ****************************************************************************** * @file usart.h * @brief This file contains all the function prototypes for * the usart.c file ****************************************************************************** * @attention * *
* All rights reserved. |
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