STM32无法进入USART中断

只看该作者 · 2014-8-18 20:51

#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);
vu32 falg1;
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);

//USART3_TX =a.9
  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);

  //USART3_RX A.10
  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){falg1=1;}
// if(temp==0xfe){flag=2;}

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(Flag==1)
// {
   GPIO_ResetBits(GPIOA,GPIO_Pin_2);
        Delay(0x2fffff);
   GPIO_SetBits(GPIOA,GPIO_Pin_2);
   Delay(0x2fffff);
   // USART_SendData(USART1 ,0xfb);

   while( falg1==1)
   {
   //falg1=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


   }
   while( nCount1==2)
   {
   nCount1=0;
GPIO_SetBits(GPIOA,GPIO_Pin_2);
GPIO_ResetBits(GPIOA,GPIO_Pin_3);
        Delay(0x2fffff);
   GPIO_SetBits(GPIOA,GPIO_Pin_3);
      Delay(0x2fffff);
USART_SendData(USART1 ,0xf8);
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


   }

//    USART_SendData(USART3 ,0xfa); ///发送串口地址
//    while(USART_GetFlagStatus(USART3, USART_FLAG_TXE)== RESET);
//
// if(temp==0xff)
//    {
//    GPIO_ResetBits(GPIOA,GPIO_Pin_3);
//         Delay(0x2fffff);
//    GPIO_SetBits(GPIOA,GPIO_Pin_3);
//    Delay(0x2fffff);
// }
//}

//等待发送完成
//       USART_ClearITPendingBit(USART1,  USART_FLAG_TXE); //清楚发送标志
//       USART_SendData(USART1 ,0x02); ///发送寄存器地址
//       while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)== RESET); //等待发送完成
//       USART_ClearITPendingBit(USART1,  USART_FLAG_TXE); //清楚发送标志
//          USART_SendData(USART1 ,0x05); ///发送测量量程
//       while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)== RESET); //等待发送完成
//    USART_ClearITPendingBit(USART1,  USART_FLAG_TXE); //清楚发送标志

  }
}