关于usart1的接受中断问题

LUOHAO

int bite=0;
void uart_init(u32 bound){
   //GPIO¶Ë¿ÚÉèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ʹÄÜGPIOAʱÖÓ
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ʹÄÜUSART1ʱÖÓ

//´®¿Ú1¶ÔÓ¦Òý½Å¸´ÓÃÓ³Éä
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9¸´ÓÃΪUSART1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10¸´ÓÃΪUSART1

//USART1¶Ë¿ÚÅäÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9ÓëGPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //ËÙ¶È50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //ÍÆÍ츴ÓÃÊä³ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //ÉÏÀ­
GPIO_Init(GPIOA,&GPIO_InitStructure); //³õʼ»&macrA9£&notA10
   //USART1 ³õʼ»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//²¨ÌØÂÊÉèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
  USART_Init(USART1, &USART_InitStructure); //³õʼ»¯´®¿Ú1

  USART_Cmd(USART1, ENABLE);  //ʹÄÜ´®¿Ú1

//USART_ClearFlag(USART1, USART_FLAG_TC);

#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿ªÆôÏà¹ØÖжÏ

//Usart1 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//´®¿Ú1ÖжÏͨµÀ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇÀÕ¼ÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3;  //×ÓÓÅÏȼ¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   //IRQͨµÀʹÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷¡¢
#endif

}
void USART1_IRQHandler(void)                 //´®¿Ú1ÖжϷþÎñ³ÌÐò
{
  bite=1;
u8 Res;
#if SYSTEM_SUPPORT_OS   //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntEnter();   
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ)
{
  USART_ClearITPendingBit( USART3,USART_IT_RXNE);
  Res =USART_ReceiveData(USART1);//(USART1->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
  
  if((USART_RX_STA&0x8000)==0)//½ÓÊÕδÍê³É
  {
   if(USART_RX_STA&0x4000)//½ÓÊÕµ½ÁË0x0d
   {
    if(Res!=0x0a)USART_RX_STA=0;//½ÓÊÕ´íÎó,ÖØпªÊ¼
    else USART_RX_STA|=0x8000; //½ÓÊÕÍê³ÉÁË
   }
   else //»¹Ã»ÊÕµ½0X0D
   {
    if(Res==0x0d)USART_RX_STA|=0x4000;
    else
    {
     USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
     USART_RX_STA++;
     if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½ÓÊÕÊý¾Ý´íÎó,ÖØпªÊ¼½ÓÊÕ   
    }   
   }
  }      
  }
#if SYSTEM_SUPPORT_OS  //Èç¹ûSYSTEM_SUPPORT_OSΪÕ棬ÔòÐèÒªÖ§³ÖOS.
OSIntExit();              
#endif
}
#endif
为什么这个中断不能自发进入，我给串口发一个数据以后就进入了，这是怎么回事。

nashui_sx

你就不能改成gb2312 再复制

正点原子

继续努力

LUOHAO

nashui_sx 发表于 2019-11-21 20:30
你就不能改成gb2312 再复制

谢谢，我硬件的原因