STM32 - USART 串口编程实践

最新推荐文章于 2025-03-24 17:57:35 发布

hzhshu_csdn

最新推荐文章于 2025-03-24 17:57:35 发布

阅读量862

点赞数

分类专栏：嵌入式软件

本文链接：https://blog.youkuaiyun.com/hzhshu_csdn/article/details/113060339

版权

本文详细介绍了STM32的USART串口编程，包括基本数据结构和接口函数，以及两个实验：开发板收发数据和通过串口控制RGB灯。在实验1中，讲解了串口初始化、中断配置、发送接收函数的编写。实验2展示了如何通过串口接收命令控制GPIO，从而控制RGB灯的状态。同时还提供了相应的代码示例和配置注意事项。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1. 基本数据结构

在stm32f10x_usart.h 里面定义了相关结构体

1.1 USART_InitTypeDef

串口基本配置，包括波特率，字长，停止位，奇偶校验，发送/接收模式，硬件流控

/** 
  * @brief  USART Init Structure definition  
  */ 
  
typedef struct
{
  uint32_t USART_BaudRate;            /*!< This member configures the USART communication baud rate.
                                           The baud rate is computed using the following formula:
                                            - IntegerDivider = ((PCLKx) / (16 * (USART_InitStruct->USART_BaudRate)))
                                            - FractionalDivider = ((IntegerDivider - ((u32) IntegerDivider)) * 16) + 0.5 */

  uint16_t USART_WordLength;          /*!< Specifies the number of data bits transmitted or received in a frame.
                                           This parameter can be a value of @ref USART_Word_Length */

  uint16_t USART_StopBits;            /*!< Specifies the number of stop bits transmitted.
                                           This parameter can be a value of @ref USART_Stop_Bits */

  uint16_t USART_Parity;              /*!< Specifies the parity mode.
                                           This parameter can be a value of @ref USART_Parity
                                           @note When parity is enabled, the computed parity is inserted
                                                 at the MSB position of the transmitted data (9th bit when
                                                 the word length is set to 9 data bits; 8th bit when the
                                                 word length is set to 8 data bits). */
 
  uint16_t USART_Mode;                /*!< Specifies wether the Receive or Transmit mode is enabled or disabled.
                                           This parameter can be a value of @ref USART_Mode */

  uint16_t USART_HardwareFlowControl; /*!< Specifies wether the hardware flow control mode is enabled
                                           or disabled.
                                           This parameter can be a value of @ref USART_Hardware_Flow_Control */
} USART_InitTypeDe

最低0.47元/天解锁文章