STM32 USART串口的学习与体会

annel; //选择串口1中断

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; //抢占式中断优先级设置为0

NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; //响应式中断优先级设置为0

NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;//使能中断

NVIC_Init(&NVIC_InitStructure);

}

然后在stm32f10x_it.c文件中找到相应的中断处理函数，并填入一下内容。注意在stm32f10x_it.c中，要声明一下外部变量RX_status

extern FlagStatus RX_status;

void USART1_IRQHandler(void)

{

GPIO_SetBits(GPIOB, GPIO_Pin_5);

//确认是否接收到数据

RX_status = USART_GetFlagStatus(USART1,USART_FLAG_RXNE);

//接收到数据

if(RX_status == SET)

{

//将数据回送至超级终端

USART_SendData(USART1, USART_ReceiveData(USART1));

//等待数据发送完毕

while(USART_GetFlagStatus(USART1, USART_FLAG_TC) ==RESET);

GPIO_ResetBits(GPIOB, GPIO_Pin_5);

}

}