程序使用USART5和TIM5就会进去硬件错误中断，这是什么问题？

只看该作者 · 2017-10-30 14:27

如题，只是加入串口5和定时器5，就会进入硬件中断，这是什么问题？程序如下：
void USART5_init(uint32_t bound)
{
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); //使能USART1，GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); //使能USART1，GPIOA时钟
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE); //使能USART1，GPIOA时钟
//USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
  GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOA.9

  //USART1_RX    GPIOA.10初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化GPIOA.10

  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=5 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

USART_InitStructure.USART_BaudRate = bound;//串口波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx ; //收发模式

  USART_Init(UART5, &USART_InitStructure); //初始化串口1
  USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//开启串口接受中断
  USART_Cmd(UART5, ENABLE);                   //使能串口1

}

void UART5_IRQHandler(void)             //串口1中断服务程序
{
      u8 Res;

      if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)  //接收中断(接收到的数据必须是0x0d 0x0a结尾)
      {
Res =USART_ReceiveData(UART5); //读取接收到的数据

TIM5->CNT = 0;
TIM_Cmd(TIM5, ENABLE);  //使能TIMx
if(USART_RX_STA<100)
USART_RX_BUF[USART_RX_STA++]=Res ;
   }
}

#if 1
void TIM5_init(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); //时钟使能

//定时器TIM3初始化
TIM_TimeBaseStructure.TIM_Period = 100; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =71; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
TIM_ClearITPendingBit(TIM5, TIM_IT_Update);       //清除TIM3更新中断标志
TIM_ITConfig(TIM5,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断

//中断优先级NVIC设置
NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;  //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;  //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4;  //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);  //初始化NVIC寄存器

TIM_Cmd(TIM5, DISABLE);  //使能TIMx

}

void TIM5_IRQHandler(void)
{

if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM5, TIM_IT_Update  );
TIM_Cmd(TIM5, DISABLE);
USART_RX_STA =0;
//TRACE_DEBUG((STR_ID_NULL,"USART %X %X %X ",USART_RX_BUF[0],USART_RX_BUF[1],USART_RX_BUF[2]));
}
}
#endif