STM32 串口2 接收不到中断数据

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楼主

车水马龙|

楼主 | 2018-6-29 15:34 | 只看该作者回帖奖励

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串口, STM32, USART, SAR, IO

一下部分，是我的串口2 初始化部分；
void USART2_Config(void)
{
//Uart2 GPIO口初始化
GPIO_InitTypeDef GPIO_InitStructure;
//Uart2 串口模式初始化
USART_InitTypeDef USART_InitStructure;
//Uart2 接受中断初始化
NVIC_InitTypeDef NVIC_InitStructure;

/* config USART2 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* USART2 GPIO config */
/* Configure USART2 Tx (PA.2) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART3 Rx (PA.3) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USART2 mode config */
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);

/* 使能串口2接收中断 */
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_Cmd(USART2, ENABLE);
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the USARTy Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
一下部分是我的中断接收函数
void USART2_IRQHandler(void)
{
if(USART_GetITStatus(USART2, USART_IT_RXNE) == SET)
{
  USART_ClearFlag(USART2 , USART_FLAG_ORE);
  USART_ReceiveData(USART2);
  if(RecCard_Ok_Flag == 0)
  {
if(Count < 4)
{
   RecCardData_Buf[Count] = USART_ReceiveData(USART2);
Count ++;
}
else if(Count == 4)
{
RecCardData_Buf[Count] = USART_ReceiveData(USART2);
if(RecCardData_Buf[4]==(RecCardData_Buf[0]^RecCardData_Buf[1]^RecCardData_Buf[2]^RecCardData_Buf[3]))
{
   RecCard_Ok_Flag = 1;
   USART_ClearITPendingBit(USART2,USART_IT_RXNE);
}
}
else
{
Count = 0;
RecCard_Ok_Flag = 0;

}
  }
}
}
就这样，中断函数一直进不去。求大神指点啊。

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STM32 串口2 接收不到中断数据

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