这一句的意思是允许USART_IT_RXNE中断,还是产生USART_IT_RXNE中断.
这一句的意思是允许USART_IT_RXNE中断,还是产生USART_IT_RXNE中断.
当接受到数据时是否进入接收中断,,你说是允许还是产生
是使能中断,按照你的理解 就是允许
允许。
如果你是stm32初学者,建议你查看STM32固件库使用手册的中文翻译版.pdf
关于这个函数有如下解释:
如果你有一定的stm32基础,建议你直接查看库函数源代码:
这个里面是官方原版解释,如下图:
允许USART_IT_RXNE中断。
/**
* @brief Checks whether the specified USART interrupt has occurred or not.
* @param USARTx: Select the USART or the UART peripheral.
* This parameter can be one of the following values:
* USART1, USART2, USART3, UART4 or UART5.
* @param USART_IT: specifies the USART interrupt source to check.
* This parameter can be one of the following values:
* @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
* @arg USART_IT_LBD: LIN Break detection interrupt
* @arg USART_IT_TXE: Tansmit Data Register empty interrupt
* @arg USART_IT_TC: Transmission complete interrupt
* @arg USART_IT_RXNE: Receive Data register not empty interrupt
* @arg USART_IT_IDLE: Idle line detection interrupt
* @arg USART_IT_ORE: OverRun Error interrupt
* @arg USART_IT_NE: Noise Error interrupt
* @arg USART_IT_FE: Framing Error interrupt
* @arg USART_IT_PE: Parity Error interrupt
* @retval The new state of USART_IT (SET or RESET).
*/
ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT)