STM32HAL库中和串口有关的全部结构体和文件

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已于 2024-12-19 12:56:07 修改 · 602 阅读

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#stm32 #嵌入式硬件 #单片机

于 2024-12-18 16:55:13 首次发布

一、结构体

USART_TypeDef

/** 
  * @brief Universal Synchronous Asynchronous Receiver Transmitter
  */
 
typedef struct
{
  __IO uint32_t SR;         /*!< USART Status register,                   Address offset: 0x00 */
  __IO uint32_t DR;         /*!< USART Data register,                     Address offset: 0x04 */
  __IO uint32_t BRR;        /*!< USART Baud rate register,                Address offset: 0x08 */
  __IO uint32_t CR1;        /*!< USART Control register 1,                Address offset: 0x0C */
  __IO uint32_t CR2;        /*!< USART Control register 2,                Address offset: 0x10 */
  __IO uint32_t CR3;        /*!< USART Control register 3,                Address offset: 0x14 */
  __IO uint32_t GTPR;       /*!< USART Guard time and prescaler register, Address offset: 0x18 */
} USART_TypeDef;

SR是状态寄存器，用于反映串口的各种状态，如发送完成标志、接收完成标志等；

DR是数据寄存器，用于存储要发送或已经接收的数据；

BRR是波特率寄存器，用于设置串口的通信波特率；

CR1、CR2、CR3是控制寄存器，用于配置串口的工作模式、数据格式、中断使能等；

GTPR是保护时间和预分频器寄存器。

UART_InitTypeDef

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

  uint32_t WordLength;                /*!< Specifies the number of data bits transmitted or received in a frame.
                                           This parameter can be a value of @ref UART_Word_Length */

  uint32_t StopBits;                  /*!< Specifies the number of stop bits transmitted.
                                           This parameter can be a value of @ref UART_Stop_Bits */

  uint32_t Parity;                    /*!< Specifies the parity mode.
                                           This parameter can be a value of @ref UART_Parity