STM32F030 USART2配置函数 波特率不对导致无法进入中断

今天调试STM32F030 USART2，收发不了数据，仿真的时候进入不了中断，但是配置也是正确的。搞了很久，原因是先初始化的串口再初始化Flash数据，导致读入的波特率是0，进而无法正常使用USART2，浪费了大量的时间，血的教训呀。

void UartIntial(void){
	int i;
	GPIO_InitTypeDef   GPIO_uInitStructure;
	USART_InitTypeDef  USART_uInitStructure;
	NVIC_InitTypeDef NVIC_InitStructure; 

	
	for(i=0; i<MAX_UART_PORT_NUM; i++){
		memset((unsigned char*)&uart[i], 0x00, sizeof(struct UartApiBuf));
		uart[i].Snd.IsSndIng = FALSE;
		uart[i].Snd.IsRcvIng = FALSE;
		uart[i].Snd.lpChar = 0;
		uart[i].Snd.lpIdle = 0;
		
		uart[i].Rcv.IsSndIng = FALSE;
		uart[i].Rcv.IsRcvIng = FALSE;
		uart[i].Rcv.lpChar = 0;
		uart[i].Rcv.lpIdle = 0;
	}

	

	// USART2_EN -> PA0 
	// USART2_TX -> PA2 
  // USART2_RX -> PA3
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
	
	GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_1);
	GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_1);
	
	GPIO_uInitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
	GPIO_uInitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_uInitStructure.GPIO_OType = GPIO_OType_PP;  
	GPIO_uInitStructure.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_uInitStructure.GPIO_Speed = GPIO_Speed_50MHz;  // 50M
	GPIO_Init(GPIOA,&GPIO_uInitStructure);

	GPIO_uInitStructure.GPIO_Pin = GPIO_Pin_0;
	GPIO_uInitStructure.GPIO_Mode = GPIO_Mode_OUT;
	GPIO_uInitStructure.GPIO_OType = GPIO_OType_PP;  
	GPIO_uInitStructure.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_uInitStructure.GPIO_Speed = GPIO_Speed_50MHz;  // 50M
	GPIO_Init(GPIOA,&GPIO_uInitStructure);
	GPIO_ResetBits(GPIOA, GPIO_Pin_0);
	
	
	NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;	
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);	
	
	
	USART_uInitStructure.USART_BaudRate = s.Baud;
	USART_uInitStructure.USART_Parity = USART_Parity_No;
	USART_uInitStructure.USART_StopBits = USART_StopBits_1;
	USART_uInitStructure.USART_WordLength = USART_WordLength_8b;
	USART_uInitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_uInitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_Init(USART2,&USART_uInitStructure);
	
	USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);
	
  USART_Cmd(USART2,ENABLE);
}