STM32串口接收数据，只能收到第一个字符

猪仔小坏

STM32F103串口接收字符，发送多个，只能接收到第一个字符，我发送的是{0xfe,0x01,0xfd},只能收到0xfe，帮忙看下，

[mw_shl_code=c,true]

[mw_shl_code=c,true]void USART_Config(USART_TypeDef* USARTx,u32 baud){ USART_InitTypeDef USART_InitStructure; USART_InitStructure.USART_BaudRate =baud; //波特率38400bps USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位 USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位 USART_InitStructure.USART_Parity = USART_Parity_No; //无校验位 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件流控 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式 USART_Init(USARTx, &USART_InitStructure); USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE); //使能接收中断 /* 使能串口 */ USART_Cmd(USARTx, ENABLE); }[/mw_shl_code] void NVIC_Configuration(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;
  EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);  
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;     //设置串口2中断
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级0
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void USART2_IRQHandler(void)
{
OS_CPU_SR  cpu_sr;
   USART_TypeDef  *usart;
    CPU_INT08U      rx_data;
OS_ENTER_CRITICAL();  //
  OSIntNesting++;  //
  OS_EXIT_CRITICAL();  //
  usart = USART2;
if (USART_GetFlagStatus(usart, USART_FLAG_ORE) != RESET)//
{
USART_ReceiveData(usart);
}
  DBG(USART1,"* USART2_IRQHandler :\r\n");
    if(USART_GetITStatus(usart, USART_IT_RXNE) != RESET)   //
  {  
rx_data = USART_ReceiveData(usart) & 0xFF;              /* Read one byte from the receive data register         */
SmartHomeUart2RxBuf[SmartHomeUart2RxCnt++] =rx_data;   //
    if(SmartHomeUart2RxBuf[SmartHomeUart2RxCnt-1]==0xfe)
{
SmartHomeUart2RxBuf[0]=0xfe; SmartHomeUart2RxCnt=1;

}    
else if((SmartHomeUart2RxBuf[0]==0xfe)&&(SmartHomeUart2RxBuf[SmartHomeUart2RxCnt-1]==0xfd))  
{
SmartHomeUart2RxCnt=0;
if(SmartHomeUart2RxBuf[1]==1)  
   SmartHomeZigbeeInspection=1;
   else if(SmartHomeUart2RxBuf[1]==2) 
 SmartHomeZigbeeInspection=3;//1
    }
USART_ClearITPendingBit(usart, USART_IT_RXNE);  
 }
if (USART_GetITStatus(usart, USART_IT_TXE) != RESET) 
{
USART_ClearITPendingBit(usart, USART_IT_TXE);           /* Clear the USART1 transmit interrupt */
}
    OSIntExit();    
}[/mw_shl_code]

猪仔小坏

回复【3楼】dgdzov:
---------------------------------
谢谢，我已经解决了，我把中断中有个打印的去掉了就行了，那个打印把中断时间拖太长了。。

猪仔小坏

我用的是串口2,38400波特率，只能收到第一个字符，各位大神求助攻，头都大了

dgdzov

单独仅仅跑uart接收试试，或者把波特率降低。