STM32串口透传STM32CubeMX配置

glgsy

已于 2024-12-06 09:09:46 修改

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文章标签： stm32 嵌入式硬件单片机

于 2024-12-03 16:41:09 首次发布

本文链接：https://blog.youkuaiyun.com/glgsy/article/details/144218131

配置STM32两个串口实现透传。使用STM32CubeMX配置

配置两个串口USART1和USART2

生成文件

改写usart.c加入代码

/* USER CODE BEGIN 0 */
// 假设我们使用USART1和USART2作为透传的串口
uint16_t USART1_RX_STA=0;
uint8_t USART1_RX_BUF[800];//串口转存空间

uint16_t USART2_RX_STA=0;
uint8_t USART2_RX_BUF[800];//串口转存空间


int uart_flag = 1;

struct __FILE 
{ 
	int handle; 
}; 

FILE __stdout;       
//定义_sys_exit()以避免使用半主机模式    
void _sys_exit(int x) 
{ 
	x = x; 
} 
//重定义fputc函数 
int fputc(int ch, FILE *f)
{ 	
	
if(uart_flag == 1)
	{
		while((USART1->ISR&0X40)==0);//循环发送,直到发送完毕   
    USART1->TDR = (uint8_t) ch; 
	}
	else if(uart_flag == 2)
	{
		while((USART2->ISR&0X40)==0);//循环发送,直到发送完毕   
    USART2->TDR = (uint8_t) ch; 
	}	
	return ch;
}
/* USART1 init function */
/* USER CODE END 0 */

在MX_USART1_UART_Init(void)中加入语句HAL_UART_Receive_IT(&huart1,USART1_RX_BUF,1); 开启中断

在回调函数HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)中加入转发语句

/* USER CODE BEGIN 1 */
// USART1中断回调函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART1)
    {
        HAL_UART_Transmit(&huart2,USART1_RX_BUF,1,100);//串口2发送接收buff里的东西	
		  HAL_UART_Receive_IT(&huart1,USART1_RX_BUF,1);// 再次启动USART1的接收中断
			uart_flag = 1;
    }
    else if (huart->Instance == USART2)
    {
        
			
			HAL_UART_Transmit(&huart1,USART2_RX_BUF,1,100);//串口1发送接收buff里的东西	
		  HAL_UART_Receive_IT(&huart2,USART2_RX_BUF,1);// 再次启动USART2的接收中断
			uart_flag = 2;
    }
}
/* USER CODE END 1 */

完整usart.c代码

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    usart.c
  * @brief   This file provides code for the configuration
  *          of the USART instances.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 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 "usart.h"

/* USER CODE BEGIN 0 */
// 假设我们使用USART1和USART2作为透传的串口
uint16_t USART1_RX_STA=0;
uint8_t USART1_RX_BUF[800];//串口转存空间

uint16_t USART2_RX_STA=0;
uint8_t USART2_RX_BUF[800];//串口转存空间


int uart_flag = 1;

struct __FILE 
{ 
	int handle; 
}; 

FILE __stdout;       
//定义_sys_exit()以避免使用半主机模式    
void _sys_exit(int x) 
{ 
	x = x; 
} 
//重定义fputc函数 
int fputc(int ch, FILE *f)
{ 	
	
if(uart_flag == 1)
	{
		while((USART1->ISR&0X40)==0);//循环发送,直到发送完毕   
    USART1->TDR = (uint8_t) ch; 
	}
	else if(uart_flag == 2)
	{
		while((USART2->ISR&0X40)==0);//循环发送,直到发送完毕   
    USART2->TDR = (uint8_t) ch; 
	}	
	return ch;
}
/* USART1 init function */
/* USER CODE END 0 */

UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;

/* USART1 init function */

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;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */
	//开启中断
HAL_UART_Receive_IT(&huart1,USART1_RX_BUF,1);	
  /* USER CODE END USART1_Init 2 */

}
/* USART2 init function */

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;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */
	//开启中断
HAL_UART_Receive_IT(&huart2,USART2_RX_BUF,1);	
  /* USER CODE END USART2_Init 2 */

}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
  if(uartHandle->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspInit 0 */

  /* USER CODE END USART1_MspInit 0 */

  /** Initializes the peripherals clock
  */
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART1;
    PeriphClkInitStruct.Usart16ClockSelection = RCC_USART16CLKSOURCE_D2PCLK2;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }

    /* USART1 clock enable */
    __HAL_RCC_USART1_CLK_ENABLE();

    __HAL_RCC_GPIOB_CLK_ENABLE();
    /**USART1 GPIO Configuration
    PB14     ------> USART1_TX
    PB15     ------> USART1_RX
    */
    GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_15;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF4_USART1;
    HAL_GPIO_Init(GPIOB, &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 */
  }
  else if(uartHandle->Instance==USART2)
  {
  /* USER CODE BEGIN USART2_MspInit 0 */

  /* USER CODE END USART2_MspInit 0 */

  /** Initializes the peripherals clock
  */
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART2;
    PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }

    /* USART2 clock enable */
    __HAL_RCC_USART2_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**USART2 GPIO Configuration
    PA2     ------> USART2_TX
    PA3     ------> USART2_RX
    */
    GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* USART2 interrupt Init */
    HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USART2_IRQn);
  /* USER CODE BEGIN USART2_MspInit 1 */

  /* USER CODE END USART2_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
    PB14     ------> USART1_TX
    PB15     ------> USART1_RX
    */
    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_14|GPIO_PIN_15);

    /* USART1 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspDeInit 1 */

  /* USER CODE END USART1_MspDeInit 1 */
  }
  else if(uartHandle->Instance==USART2)
  {
  /* USER CODE BEGIN USART2_MspDeInit 0 */

  /* USER CODE END USART2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART2_CLK_DISABLE();

    /**USART2 GPIO Configuration
    PA2     ------> USART2_TX
    PA3     ------> USART2_RX
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);

    /* USART2 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART2_IRQn);
  /* USER CODE BEGIN USART2_MspDeInit 1 */

  /* USER CODE END USART2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */
// USART1中断回调函数
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART1)
    {
        HAL_UART_Transmit(&huart2,USART1_RX_BUF,1,100);//串口2发送接收buff里的东西	
		  HAL_UART_Receive_IT(&huart1,USART1_RX_BUF,1);// 再次启动USART1的接收中断
			uart_flag = 1;
    }
    else if (huart->Instance == USART2)
    {
        
			
			HAL_UART_Transmit(&huart1,USART2_RX_BUF,1,100);//串口1发送接收buff里的东西	
		  HAL_UART_Receive_IT(&huart2,USART2_RX_BUF,1);// 再次启动USART2的接收中断
			uart_flag = 2;
    }
}
/* USER CODE END 1 */

程序下载：https://download.youkuaiyun.com/download/glgsy/90089167?spm=1001.2014.3001.5503