阻塞模式和非阻塞模式......
我的理解是:
阻塞模式就像是一個延時函數,當這個函數沒處理完那么,所有的按照流程需要執行的代碼都不會被執行,要等到這個延時完成,類似 平時看書上寫的LED燈閃爍,用的delay()一樣..
而非阻塞模式就像他定義的那樣,一般用的是中斷,執行這條語句的時候,開啟相應的中斷達到一定的條件才進行處理,這樣不會影響到流程的執行.
我的理解就是,阻塞就是死等,非阻塞就是中斷
可以參考
/**
* @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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原文鏈接：https://blog.csdn.net/liming0931/article/details/99721916