freemodbus 485通讯会通不上 232正常

qwe123 · 发表于 2020-5-18 17:38:10

在线提问  freemodbus 485通讯开机的时候也能通上但是过一段时间就不行了使能脚也已经加上，要是485断开就都通不上，重新开机又能通上但是过段时间不行，232正常
/* ----------------------- Start implementation -----------------------------*/
/**
  * @brief  控制接收和发送状态
  * @param  xRxEnable 接收使能、
  *       xTxEnable 发送使能
  * @retval None
  */
void
vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable )
{
/* If xRXEnable enable serial receive interrupts. If xTxENable enable启用串口接收中断。如果xTxENable启用
   * transmitter empty interrupts.发送机空中断
   */
      if(xRxEnable)
  {
            __HAL_UART_ENABLE_IT(&huart2,UART_IT_RXNE); //使能接收和接收中断
            HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_RESET);
            #if EN_USART1_RX==1                                                                      //MAX485操作低电平为接收模式
            UART1_RX_MODE();
            #endif
// printf("xRxEnable\n");
      }
  else
  {
            __HAL_UART_DISABLE_IT(&huart2,UART_IT_RXNE);
            HAL_GPIO_WritePin(GPIOA,GPIO_PIN_1,GPIO_PIN_SET);
            #if EN_USART1_RX==1                                                                   //MAX485操作高电平为发送模式
            UART1_TX_MODE();
            #endif
//  printf("xRxEEEE\n");
      }
  if(xTxEnable)
  {
            __HAL_UART_ENABLE_IT(&huart2,UART_IT_TXE);  //使能发送完成中断
      }
  else
  {
      __HAL_UART_DISABLE_IT(&huart2,UART_IT_TXE);    //禁止发送完成中断
  }
}

/**
  * @brief  串口初始化
  * @param  ucPORT    串口号
  *       ulBaudRate  波特率
  *       ucDataBits  数据位
  *       eParity    校验位
  * @retval None
  */
BOOL
xMBPortSerialInit( UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits, eMBParity eParity )
{
      static  uint32_t  ePar_ity;
      (void)ucPORT;    //不修改串口
  (void)ucDataBits; //不修改数据位长度
      if (eParity ==MB_PAR_NONE)                                        //校验格式
      {
            ePar_ity= UART_PARITY_NONE;
      }else if (eParity ==MB_PAR_ODD)
  {
            ePar_ity= UART_PARITY_ODD;
      }else if (eParity ==MB_PAR_EVEN)
      {
      ePar_ity=UART_PARITY_EVEN;
  }
      MX_USART2_UART_Init((uint32_t) ulBaudRate,ePar_ity);
  return TRUE;
}
/**
  * @brief  通过串口发送数据
  * @param  None
  * @retval None
  */
BOOL
xMBPortSerialPutByte( CHAR ucByte )
{
  /* Put a byte in the UARTs transmit buffer. This function is called在UARTs传输缓冲区中放置一个字节。这个函数被调用
* by the protocol stack if pxMBFrameCBTransmitterEmpty( ) has been按照协议栈，如果pxMBFrameCBTransmitterEmpty( )已经发送数据
* called. */

      #if EN_USART1_RX==1
      UART1_TX_MODE();
      #endif
      if(HAL_UART_Transmit(&huart2,(uint8_t*)&ucByte,1,0x05)!=HAL_OK)  //发送数据
  return FALSE;
  else
  return TRUE;
}
/**
  * @brief  从串口获得数据
  * @param  None
  * @retval None
  */
BOOL
xMBPortSerialGetByte( CHAR * pucByte )
{
  /* Return the byte in the UARTs receive buffer. This function is called将字节返回到UARTs receive接收缓冲区
* by the protocol stack after pxMBFrameCBByteReceived( ) has been called.
*/
      /**pucByte = USART_ReceiveData(USART1); */

      #if EN_USART1_RX==1
      UART1_RX_MODE();
      #endif
      if(HAL_UART_Receive(&huart2,(uint8_t*)pucByte,1,0x05)!=HAL_OK)  //接收数据
  return FALSE;
  else
      return TRUE;
}
/* Create an interrupt handler for the transmit buffer empty interrupt
* (or an equivalent) for your target processor. This function should then
* call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
* a new character can be sent. The protocol stack will then call
* xMBPortSerialPutByte( ) to send the character.
*/
void prvvUARTTxReadyISR( void )
{
  //pxMBFrameCBTransmitterEmpty = xMBRTUTransmitFSM //mb.c eMBInit函数中
  pxMBFrameCBTransmitterEmpty();  //发送状态机
}
/* Create an interrupt handler for the receive interrupt for your target
* processor. This function should then call pxMBFrameCBByteReceived( ). The
* protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
* character.
*/
void prvvUARTRxISR( void )
{
  //pxMBFrameCBByteReceived = xMBRTUReceiveFSM       //mb.c eMBInit函数中
  pxMBFrameCBByteReceived();  //接收状态机
}

/**
  * @brief  USART1中断服务函数
  * @param  None
  * @retval None
*/