求救STM32使用库串口接收中断打死也进不去

7628950

求救STM32使用库串口接收中断打死也进不去 [复制链接]

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);

andy211457

                                 别打死就进去了

toy720

                                 前三个函数正确设置了吗？引脚配置，时钟分配，中断使能。对照DEMO程序好好检查，不会太难的。

azhe

确定使用偶校验？
确定GPIO正确且没有使用复用映射？

春风维修

接收到数据没有？
是不是通讯的两端设置不相同造成的？

DBSSAM

                                 楼主应该没有在STM32 寄存器地狱中历练过。

hahaxiao

可以进啊，你再看看吧，这部分好像没问题吧。我这有个例程给你做参考。
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
      
  /* NVIC configuration */
  NVIC_Configuration();

  /* Configure the GPIO ports */
  GPIO_Configuration();

/* USARTy and USARTz configuration ------------------------------------------------------*/
  /* USARTy and USARTz configured as follow:
        - BaudRate = 9600 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - No parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = 115200;
  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;

  /* Configure USARTy */
  USART_Init(USARTy, &USART_InitStructure);
  /* Configure USARTz */
  USART_Init(USARTz, &USART_InitStructure);
  
  /* Enable USARTy Receive and Transmit interrupts */
  USART_ITConfig(USARTy, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USARTy, USART_IT_TXE, ENABLE);

  /* Enable USARTz Receive and Transmit interrupts */
  USART_ITConfig(USARTz, USART_IT_RXNE, ENABLE);
  USART_ITConfig(USARTz, USART_IT_TXE, ENABLE);

  /* Enable the USARTy */
  USART_Cmd(USARTy, ENABLE);
  /* Enable the USARTz */
  USART_Cmd(USARTz, ENABLE);

  /* Wait until end of transmission from USARTy to USARTz */
  while(RxCounter2 < RxBufferSize2)
  {
  }

  /* Wait until end of transmission from USARTz to USARTy */
  while(RxCounter1 < RxBufferSize1)
  {
  }
  
  /* Check the received data with the send ones */
  TransferStatus1 = Buffercmp(TxBuffer2, RxBuffer1, RxBufferSize1);
  /* TransferStatus1 = PASSED, if the data transmitted from USARTz and  
     received by USARTy are the same */
  /* TransferStatus1 = FAILED, if the data transmitted from USARTz and
     received by USARTy are different */
  TransferStatus2 = Buffercmp(TxBuffer1, RxBuffer2, RxBufferSize2);
  /* TransferStatus2 = PASSED, if the data transmitted from USARTy and  
     received by USARTz are the same */
  /* TransferStatus2 = FAILED, if the data transmitted from USARTy and
     received by USARTz are different */

  while (1)
  {
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,  
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();
   
  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);

#ifndef USE_STM3210C_EVAL
  /* Enable USARTy Clock */
  RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE);
#else
  /* Enable USARTy Clock */
  RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE);
#endif
  /* Enable USARTz Clock */
  RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);  
}

/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

#ifdef USE_STM3210C_EVAL
  /* Enable the USART3 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
  
  /* Enable the USART2 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);  
#elif defined USE_STM3210B_EVAL
  /* Enable the USART2 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#endif

  /* Configure USARTy Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
  
  /* Configure USARTz Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = USARTz_RxPin;
  GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);  
  
  /* Configure USARTy Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);

  /* Configure USARTz Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = USARTz_TxPin;
  GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);  
}

/**
  * @brief  Configures the nested vectored interrupt controller.
  * @param  None
  * @retval None
  */
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure the NVIC Preemption Priority Bits */  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  
  /* Enable the USARTy Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USARTy_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* Enable the USARTz Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USARTz_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

reacera

乱78遭的。

很简单啊，因为你用的是库函数，官方这个程序是专门针对官方的开发板的。所以把
#ifdef USE_STM3210C_EVAL  到 #endif中间要看清楚了。要是你条理清楚的话把这个删掉，只选适合你的。
你的串口进不了中断：
1.你的时钟是否正确。官方的时钟用的是外部8M晶振，要是你用的是16M的时候你就要改一下寄存器了。沿着这个SystemInit();函数可以找到。
2.你的中断函数的名字对不对，这个可以看起动文件，里面有中断的名字。你用的是USART2.则函数名为USART2_IRQHandler.
3.你的外设时钟开启的对不对。GPIO的时钟对不对。
4. 好好理理你的程序。你搞这么长没人有时间去看的。