自己按照视频写的串口程序。串口可以发，但是加上中断后。进入不到中断

show2449 · 发表于 2016-3-7 10:44:59

自己按照视频写的串口程序。想打到给串口发数据，串口收到数据后，有将收到的数据重新发到电脑上。但是写好的程序。串口可以发，但是加上中断后。进入不到中断。以下是我的程序：  请指教

void usart_init()
{
GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStruct);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStruct);

USART_InitStruct.USART_BaudRate = 9600;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART2,&USART_InitStruct);
USART_Cmd(USART2,ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);

}

void USART2_IRQHandler()
{
float adc;
USART_SendData(USART2,'2');
  if(USART_GetITStatus(USART2,USART_IT_RXNE)==1)
  {
USART_ClearITPendingBit(USART2,USART_IT_RXNE);
adc=USART_ReceiveData(USART2);

            USART_SendData(USART2,adc);
USART_ITConfig(USART2,USART_IT_RXNE,DISABLE);
}

}

int main()
{
  usart_init();
  USART_SendData(USART2,'1');//这个1可以发送。
while(1)；
}