stm32 USART1 收不到数据？请指点

[__devil__]

void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);


GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

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(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ClearFlag(USART1, USART_FLAG_TC);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}

void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}


主函数：
int main(void)
{
SysTick_Config(SystemCoreClock/1000);

LCD_Init();
LED_Init();
USART1_Config();
NVIC_Config();

while(1);
}


中断函数：
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
USART_SendData(USART1, USART_ReceiveData(USART1));
while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET);
}
USART_ClearFlag(USART1,USART_FLAG_TC);
}


编译是正确的，我看的教程里都是这样写的，但板子却收不到PC发来的数据，换成用USART2就能收到

[forget345]

void USART1_IRQHandler(void) 
{  
  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) 
  {
    USART_SendData(USART1, USART_ReceiveData(USART1)); 
    while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET); 
  }
  USART_ClearFlag(USART1,USART_FLAG_TC); 
}

都喜欢在 IRQHandler里 while吗？哪个写的教程？

[Glen_hsu]

由于两个中断不是同时发生的，应该分开判断是谁的中断，然后分别处理

[A Kami.]

我也是这个问题，请问楼主解决了吗？