STMCUBEIDE RT-THREAD NANO工程搭建（LED闪灯+UART)

RT-THREAD提供了用于STM32CUBEIDE/STM32CUBEMX的支持包，从而可以搭建资源占用最小化的Nano系统。这里以STM32F401CCU6开发板和STM32CUBEIDE开发环境为例，搭建LED闪灯和UART通讯两个任务的工程。

本实验是在 STMCUBEIDE RT-THREAD NANO工程搭建（LED闪灯 ) 的基础上增加UART通讯，所以基本工程搭建过程一致，这里只介绍增加的部分。

UART配置

这里采用UART2作为通讯口，在工程的rtconfig.h文件里，就不需要注释掉RT_USING_CONSOLE。另外如果不使用UART2而使用如UART1,则仍然应注释掉RT_USING_CONSOLE。
在这里插入图片描述

保存后生成增加UART2配置后的代码。

任务代码升级

app_rt_thread.c里需要增加串口的任务，这里的任务设计为默认定时打印输出”You make it!“，而当每次收到接收中断后，会插入一条"Well done!"的打印输出，这里的实验功能不对串口接收到的数据做识别，可自行增加及调整。

app_rt_thread.c的代码：

#include "rtthread.h"
#include "main.h"
#include "stdio.h"


/* 定义线程控制块 */
void MX_RT_Thread_Init(void);
//添加LED闪烁线程
static struct rt_thread led_thread;
static char led_thread_stack[256];
static void led_thread_entry(void *parameter);

static struct rt_thread uart2_thread;
static char uart2_thread_stack[256];
static void uart2_thread_entry(void *parameter);


void MX_RT_Thread_Init(void)
{
	//初始化线程
	rt_err_t rst;
	rst = rt_thread_init(&led_thread,
						(const char *)"ledshine",  /* 线程名字 */
						led_thread_entry,  /* 线程入口函数 */
						RT_NULL,           /* 线程入口函数参数 */
						&led_thread_stack[0],
						sizeof(led_thread_stack),   /* 线程栈大小 */
						RT_THREAD_PRIORITY_MAX-2,  /* 线程的优先级 */
						20); /* 线程时间片 */
	if(rst == RT_EOK)
	{///* 启动线程，开启调度 */
		rt_thread_startup(&led_thread);
	}

	rst = rt_thread_init(&uart2_thread,
						(const char *)"uart2_console_output",  /* 线程名字 */
						uart2_thread_entry,  /* 线程入口函数 */
						RT_NULL,           /* 线程入口函数参数 */
						&uart2_thread_stack[0],
						sizeof(uart2_thread_stack),   /* 线程栈大小 */
						RT_THREAD_PRIORITY_MAX-3,  /* 线程的优先级 */
						20); /* 线程时间片 */
	if(rst == RT_EOK)
	{///* 启动线程，开启调度 */
		rt_thread_startup(&uart2_thread);
	}

}


/*
*************************************************************************
* 线程定义
*************************************************************************
*/
static void led_thread_entry(void *parameter)
{
	while(1)
	{
		HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
		rt_thread_mdelay(500);
	}
}

static void uart2_thread_entry(void *parameter)
{
	extern UART_HandleTypeDef huart2;
	extern uint8_t StatusFlag ;
	extern uint8_t Uart2_RxBuff[8];

	char resp1[] = "You make it!\r\n";
	char resp2[] = "Well done!\r\n";
	while(1)
	{
		if(StatusFlag==0)
		{
			HAL_UART_Transmit(&huart2, resp1, sizeof(resp1), 2700);
			rt_thread_mdelay(500);
		}
		else
		{
			HAL_UART_Transmit(&huart2, resp2, sizeof(resp2), 2700);

			rt_thread_mdelay(500);
			StatusFlag = 0;
			__HAL_UART_CLEAR_FLAG(&huart2, UART_FLAG_RXNE);
			HAL_UART_Receive_IT(&huart2, Uart2_RxBuff, 1);
		}

	}
}

MSH_CMD_EXPORT(led_thread_entry,thread running);
MSH_CMD_EXPORT(uart2_thread_entry,thread running);

main.c代码升级

main.c代码增加串口中断接收的处理部分，代码如下：

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2022 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"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "rtthread.h"

extern void MX_RT_Thread_Init(void);

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
uint8_t StatusFlag = 0;
uint8_t Uart2_RxBuff[8];
/* 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 ---------------------------------------------------------*/
UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(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 */
#if 0
  /* 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 */
#endif
  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */
  MX_RT_Thread_Init();
  HAL_UART_Receive_IT(&huart2, Uart2_RxBuff, 1);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
	  rt_thread_mdelay(1000);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @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_SCALE2);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  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_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

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

/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART2_UART_Init(void)
{

  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);

  /*Configure GPIO pin : PC13 */
  GPIO_InitStruct.Pin = GPIO_PIN_13;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
{
    if(UartHandle==&huart2)
    {
    	StatusFlag = 1;
    }

}
/* USER CODE END 4 */

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM2 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim : TIM handle
  * @retval None
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  /* USER CODE BEGIN Callback 0 */

  /* USER CODE END Callback 0 */
  if (htim->Instance == TIM2) {
    HAL_IncTick();
  }
  /* USER CODE BEGIN Callback 1 */

  /* USER CODE END Callback 1 */
}

/**
  * @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 */