求救STM32 使用库串口接收中断打死也进不去

只看该作者 · 2010-12-26 21:21

附上部份代码.

USART_InitTypeDef
USART_InitStructure;
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
LcdShow_Init();
//StepperMotorInit();
// GPIO_Write(GPIOC,GPIO_ReadOutputData(GPIOC)|LED_var);
/* USART2 配置*/
USART_InitStructure.USART_BaudRate
=
9600;
USART_InitStructure.USART_WordLength
=
USART_WordLength_8b;//8位数据位
USART_InitStructure.USART_StopBits
=
USART_StopBits_1;
//1个停止位
USART_InitStructure.USART_Parity
=
USART_Parity_Even;//USART_Parity_No 偶校验
USART_InitStructure.USART_HardwareFlowControl
=
USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode
=
USART_Mode_Rx
|
USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
//使能USART2中断
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);

只看该作者 · 2010-12-26 21:21

噢我的天呀,怎么一下子就两个上去了

只看该作者 · 2010-12-26 21:22

噢我的天呀,怎么一下子就两个上去了

只看该作者 · 2010-12-26 21:22

/*------------------------------------------------------------------------------

         外设时钟初始化

------------------------------------------------------------------------------*/
void RCC_Configuration(void)
{
      // Enable GPIOC clock
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB
                           | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD
                           | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO,
                           ENABLE);
      //clocks enable
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3
                           | RCC_APB1Periph_TIM4 | RCC_APB1Periph_USART2,
                           ENABLE);
}

只看该作者 · 2010-12-26 21:23

void GPIO_Configuration(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;

      //TIM3全部重映像就是把4通道全部变到PC6-PC9，部份重映像就是把通道1与2重映像到PB4-5
      GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_Init(GPIOC, &GPIO_InitStructure);

      /* Configure PC.04 -- PC.11 as Output push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5
                                    | GPIO_Pin_10 | GPIO_Pin_11;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOC, &GPIO_InitStructure);

      /* Configure PD.03, PC.04, PC.11 -- PC.15 as input floating */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_11 | GPIO_Pin_12 |
                                    GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOD, &GPIO_InitStructure);

      //改变指定管脚的映射
      GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
      /* Configure USART2 Tx (PD.05) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       //复用推挽输出
      GPIO_Init(GPIOD, &GPIO_InitStructure);

      /* Configure USART2 Rx (PD.06) as input floating */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
      GPIO_Init(GPIOD, &GPIO_InitStructure);

      /* Configure PE.00 -- PE.15 as Output push-pull */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOE, &GPIO_InitStructure);
}

只看该作者 · 2010-12-26 21:24

void NVIC_Configuration(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;

#ifdef  VECT_TAB_RAM
      /* Set the Vector Table base location at 0x20000000 */
      NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
      /* Set the Vector Table base location at 0x08000000 */
      NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif

      /* Configure the Priority Group to 2 bits */
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);// 选择使用优先级分组第2组

      //使能中断并指定优先级
      NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;// 指定抢占式优先级别0
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //指定响应优先级别1
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
      /* Enable the USART2 Interrupt */
      NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
/*
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;// 指定抢占式优先级别0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //指定响应优先级别1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure); */
}

只看该作者 · 2010-12-26 21:25

/*******************************************************************************
* Function Name  : USART2_IRQHandler
* Description : This function handles USART2 global interrupt request.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void USART2_IRQHandler(void)
{
      if ( USART_GetITStatus(USART2, USART_IT_RXNE) != RESET ) {
            RxBuffer[RxCounter++] = (USART_ReceiveData(USART2) & 0x7F);
            USART_ClearITPendingBit(USART2, USART_IT_RXNE);
            if ( RxCounter == RxBufferSize ) {
                     USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
            }
      }
}
//*/