stm32 串口4 进HardFault_Handler中断 处理方法

把工程包含的  文件     startup_stm32f10x_md.s     替换成    startup_stm32f10x_hd.s   就行了

前提是    初始化  函数没有问题  

void USART4_config(unsigned int BaudRate)
{
	GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  USART_InitTypeDef USART_InitStructure;
    
  /* Enable the USART2 Pins Software Remapping */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); 
    
    
  /* Configure USART2 Rx (PC.11) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;    
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
    
  /* Configure USART2 Tx (PC.10) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
    
  /* Enable the USART2 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = 52;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);    
    
  USART_InitStructure.USART_BaudRate = BaudRate; 
  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(UART4, &USART_InitStructure);
  USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);

  USART_Cmd(UART4, ENABLE);
}