stm32f091cB串口接收不到数据

w453509596 提问时间：2016-11-25 09:23 /

小弟最近在使用stm32f091cb单片机，在做产品时需要使用串口，我使用时发现串口接收不到数据，而且而且在串口使能的时候， RXNE志位会被置1，我用了串口接收中断，这样在开中断的时候，程序就会第一次误进入中断，我串使能后，加一条清中断标志的程序，发现这个中断在单步调试时可以清除，但是在全速运行时就清除不了了，但是后通过串口调试助手发送擞数据，就不再会进入串口接收中断了。以下是我的初始化代码，求大神帮我看看。

static void MCU_enableClock(void)
{
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//  RCC_APB1PeriphClockCmd(uint32_t RCC_APB1Periph, ENABLE);
}

static void MCU_debugUsartIOInit(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;

GPIO_PinAFConfig(DEBUGCOM_TX_PORT, DEBUGCOM_TX_PinSource, DEBUGCOM_TX_GPIO_AF);
GPIO_PinAFConfig(DEBUGCOM_RX_PORT, DEBUGCOM_RX_PinSource, DEBUGCOM_RX_GPIO_AF);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Pin = DEBUGCOM_TX_Pin;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_Init(DEBUGCOM_TX_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Pin = DEBUGCOM_RX_Pin;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_Init(DEBUGCOM_RX_PORT, &GPIO_InitStructure);
}

static void HAL_debugUsartInit(void)
{
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef  NVIC_InitStructure;
USART_DeInit(DEBUG_COM);

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_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(DEBUG_COM, &USART_InitStructure);
USART_ITConfig(DEBUG_COM, USART_IT_RXNE, ENABLE);
USART_Cmd(DEBUG_COM, ENABLE);
  USART_ClearITPendingBit(DEBUG_COM, USART_IT_RXNE);

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_Init(&NVIC_InitStructure);
}