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

用户4645519

发布于 2020-09-07 11:29:59

1.4K0

发布于 2020-09-07 11:29:59

文章被收录于专栏：嵌入式学习

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)

本文参与腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。

原始发表：2019/08/19 ，如有侵权请联系 cloudcommunity@tencent.com 删除

blocking