STM32无法进入串口中断

只看该作者 · 2014-8-19 08:37

新手刚学习STM32，遇到一问题，无法进入串口中断，请大神看看是哪出问题了，信息！
#include "stm32f10x.h"
#include "stm32f10x_exti.h"
#include "stm32f10x_usart.h"

void RCC_Config(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void Delay(vu32 nCount);
void Usart1_Configration(void);
void NVIC_Configuration(void);
vu32 nCount1;

void RCC_Configuration(void)
{

  /* Enable GPIOA/GPIOB clocks */
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1 |RCC_APB2Periph_AFIO, ENABLE);
}

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

  /* Configure PA.02, PA.03  */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_TX =PA9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  //USART1_RX =PA10
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOA, &GPIO_InitStructure);

}

void Usart1_Configration()
{
// 配置串口参数
  /* USARTx 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_InitTypeDef USART_InitStructure;
  USART_InitStructure.USART_BaudRate = 9600;//波特率
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8位
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
  USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件流控制
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式
  USART_Init(USART1, &USART_InitStructure);//初始化
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断
USART_Cmd(USART1, ENABLE);                   //使能串口

}

void NVIC_Configuration(void)
{

NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);//选择中断分组

  /* Enable the EXTI Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//选择中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//抢断式中断优先级设置
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//响应式中断优先级设置
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断
  NVIC_Init(&NVIC_InitStructure);//初始化
}

void USART1_IRQHandler(void)                //串口1中断服务程序
{
vu32 temp;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断
{

temp=USART_ReceiveData(USART1);//(USART1->DR); //读取接收到的数据

   //while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);//等待接收结束

if(temp==0xff)nCount1=1;
}
USART_ClearITPendingBit(USART1,  USART_IT_RXNE); //清楚接收标志
}

void Delay(vu32 nCount)
{
  for(; nCount != 0; nCount--);
}

int main()
{

vu32 nCount1=0;
  RCC_Configuration();
GPIO_Configuration();
  NVIC_Configuration();
  Usart1_Configration();
while(1)
{
   GPIO_ResetBits(GPIOA,GPIO_Pin_2);
        Delay(0x2fffff);
   GPIO_SetBits(GPIOA,GPIO_Pin_2);
   Delay(0x2fffff);

   while( nCount1==1)
   {
   nCount1=0;
GPIO_ResetBits(GPIOA,GPIO_Pin_3);
        Delay(0x2fffff);
   GPIO_SetBits(GPIOA,GPIO_Pin_3);
      Delay(0x2fffff);
USART_SendData(USART1 ,0xfa);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE)== RESET);//等待发送完成
USART_ClearITPendingBit(USART1,  USART_FLAG_TXE); //清楚发送标志

   }

  }
}