STM32 不断进入串口中断问题 解决方法

void Usart_Init(void)
{

GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);							// 开启串口时钟

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);

GPIO_InitStructure.GPIO_Pin 	= GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed	= GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode	= GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType 	= GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd 	= GPIO_PuPd_UP;
GPIO_Init(GPIOA,&GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 57600;						// 配置波特率为115200
USART_InitStructure.USART_StopBits = USART_WordLength_8b;		// 配置数据长度为8
USART_InitStructure.USART_StopBits = USART_StopBits_1;			//设置停止位
USART_InitStructure.USART_Parity 	= USART_Parity_No;			// 配置奇偶校验为NONE
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;	// 配置硬件流为NONE
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	// 打开Rx接收和Tx发送功能

USART_Init(USART1,&USART_InitStructure);						// 配置

USART_Cmd(USART1,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;				// 选择中断通道
NVIC_InitStructure.NVIC_IRQChannelPriority = 2;					// 抢断优先1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;					// 使能中断

NVIC_Init(&NVIC_InitStructure);

<span style="color:#ff0000;">	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);					// 打开中断
USART_ITConfig(USART1, USART_IT_ORE, ENABLE);</span>					// 打开中断

}

void USART1_IRQHandler(void)
{
u8 dat;

<span style="color:#ff0000;">	if (USART_GetITStatus(USART1, USART_IT_ORE) == SET)
{
USART_ClearITPendingBit(USART1,USART_IT_ORE);
USART_ReceiveData( USART1 );

}</span>
if( USART_GetITStatus(USART1,USART_IT_RXNE) != RESET )				// 等价于if( !RI ) 检查串口数据是否已就位
{
USART_ClearITPendingBit(USART1,USART_IT_RXNE);
dat = USART_ReceiveData( USART1 );
uart_rec_buf[uart_len++]=dat;
RX_TIM=UART_INIT_TIM;

}

}