單片機(jī)初始化串口需要清除發(fā)送完成標(biāo)志位嗎?

ID:313294 · 發(fā)表于 2020-2-28 14:50

我看了一個(gè)單片機(jī)代碼，在初始化串口的時(shí)候，他清除了發(fā)送完成標(biāo)志位，我想問(wèn)一下，這個(gè)要在這里清除嗎

void usart1_para_config(void)
{
USART_InitTypeDef USART_InitStruct;
USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; //收發(fā)模式
USART_InitStruct.USART_WordLength = USART_WordLength_8b; //8
USART_InitStruct.USART_Parity = USART_Parity_No; //n
USART_InitStruct.USART_StopBits = USART_StopBits_1; //1
USART_Init(USART1 , &USART_InitStruct);
<font color="#ff0000">USART_ClearFlag(USART1, USART_IT_TC); //清除發(fā)送完成標(biāo)志位</font>
USART_Cmd(USART1, ENABLE); //使能串口 1
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能接收
}