• stm32中阻塞模式和非阻塞模式 in blocking mode 与 in non-blocking mode区别


    in blocking mode 与n no-blocking mode有啥区别?

    HAL_I2C_Master_Transmit与HAL_I2C_Master_Transmit_IT一个是在blocking模式一个是在no-blocking 模式

    阻塞模式和非阻塞模式......
    我的理解是:
    阻塞模式就像是一个延时函数,当这个函数没处理完那么,所有的按照流程需要执行的代码都不会被执行,要等到这个延时完成,类似 平时看书上写的LED灯闪烁,用的delay()一样..
    而非阻塞模式就像他定义的那样,一般用的是中断,执行这条语句的时候,开启相应的中断达到一定的条件才进行处理,这样不会影响到流程的执行.

    我的理解就是,阻塞就是死等,非阻塞就是中断

    可以参考

    /**
      * @brief  Sends an amount of data in non blocking mode.
      * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
      *         the sent data is handled as a set of u16. In this case, Size must indicate the number
      *         of u16 provided through pData.
      * @param  huart Pointer to a UART_HandleTypeDef structure that contains
      *               the configuration information for the specified UART module.
      * @param  pData Pointer to data buffer (u8 or u16 data elements).
      * @param  Size  Amount of data elements (u8 or u16) to be sent
      * @retval HAL status
      */
    HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
     

    /**
      * @brief  Sends an amount of data in blocking mode.
      * @note   When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
      *         the sent data is handled as a set of u16. In this case, Size must indicate the number
      *         of u16 provided through pData.
      * @param  huart Pointer to a UART_HandleTypeDef structure that contains
      *               the configuration information for the specified UART module.
      * @param  pData Pointer to data buffer (u8 or u16 data elements).
      * @param  Size  Amount of data elements (u8 or u16) to be sent
      * @param  Timeout Timeout duration
      * @retval HAL status
      */
    HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
     

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  • 原文地址:https://www.cnblogs.com/CodeWorkerLiMing/p/12007398.html
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