uart.c

freemodbus-v1-1-1-0.zip v1.1.1版本的代码 支持多个平台

 else

    /* Wait until the transmit shift register is empty */
    while (!(UARTx->SR & UART_TxEmpty)); 

  UARTx->TxBUFR = ((*Data) & 0x01FF);
}

/*******************************************************************************
* Function Name  : UART_DataSend
* Description    : This function sends several data bytes to the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the data to send
* Input 3        : The data length in bytes
* Output         : None
* Return         : None
*******************************************************************************/
void UART_DataSend(UART_TypeDef *UARTx, u8 *Data, u8 DataLength)
{
  
 while(DataLength--)
  {
    UART_ByteSend(UARTx,Data);
    Data++;
  }
}

/*******************************************************************************
* Function Name  : UART_9BitDataSend
* Description    : This function sends several 9-bit data to the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer to the data to send
* Input 3        : The data length 
* Output         : None
* Return         : None
*******************************************************************************/
void UART_9BitDataSend(UART_TypeDef *UARTx, u16 *Data, u8 DataLength)
{
   while(DataLength--)
  {
    UART_9BitByteSend(UARTx,Data);
    Data++;
  }
}

/*******************************************************************************
* Function Name  : UART_StringSend
* Description    : This function sends a string to the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the string to send
* Output         : None
* Return         : None
*******************************************************************************/
void UART_StringSend(UART_TypeDef *UARTx, u8 *String)
{
  u8 *Data=String;
  while(*Data != '\0')
    UART_ByteSend(UARTx, Data++);
   *Data='\0';
  UART_ByteSend(UARTx, Data);
}

/*******************************************************************************
* Function Name  : UART_ByteReceive
* Description    : This function gets a data byte from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the data where the data will be stored
* Input 3        : The time-out period
* Output         : The received 8-bit data
* Return         : The UARTx.SR register content
*******************************************************************************/
u16 UART_ByteReceive(UART_TypeDef *UARTx, u8 *Data, u8 TimeOut)
{
   u16 wStatus = 0;

/* reload the Timeout counter */
   UARTx->TOR=TimeOut;

/* while the UART_RxFIFO is empty and no Timeoutidle */
   while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));

/* then read the Receive Buffer Register */
   *Data = (u8)UARTx->RxBUFR;

   return wStatus;
}

/*******************************************************************************
* Function Name  : UART_9BitByteReceive
* Description    : This function gets a 9-bit data from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the buffer where the data will be stored
* Input 3        : The time-out period value
* Output         : The received 9-bit data
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_9BitByteReceive(UART_TypeDef *UARTx, u16 *Data, u8 TimeOut)
{
  u16 wStatus = 0;

/* reload the Timeout counter */
  UARTx->TOR=TimeOut;

/* while the UART_RxFIFO is empty and no Timeoutidle */
  while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));
 
/* then read the RxBUFR*/
  *Data = (u16)UARTx->RxBUFR; 
  return wStatus;
}

/*******************************************************************************
* Function Name  : UART_DataReceive
* Description    : This function gets 8 bits data bytes from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the buffer where the data will be stored
* Input 3        : The data length
* Input 4        : The time-out period value
* Output         : The received 8-bit data buffer
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_DataReceive(UART_TypeDef *UARTx, u8 *Data, u8 DataLength, u8 TimeOut)
{
   u16 wStatus = 0;
  while(DataLength--)
    wStatus=UART_ByteReceive(UARTx,Data++,TimeOut);
  return wStatus;
}

/*******************************************************************************
* Function Name  : UART_9BitDataReceive
* Description    : This function gets several 9-bits data from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the buffer where the data will be stored
* Input 3        : The data length
* Input 4        : The time-out value
* Output         : The received 9-bit data buffer
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_9BitDataReceive(UART_TypeDef *UARTx, u16 *Data, u8 DataLength, u8 TimeOut)
{ 
 u16 wStatus = 0;
  
  while(DataLength--)
    wStatus=UART_9BitByteReceive(UARTx,Data++,TimeOut);
  return wStatus;
}

/*******************************************************************************
* Function Name  : UART_StringReceive
* Description    : This function gets 8-bit data bytes from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the selected UART
* Input 2        : A pointer on the buffer where the string will be stored
* Output         : The received string
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_StringReceive(UART_TypeDef *UARTx, u8 *Data)
{
  u8 *pSTRING=Data;
  u16 wStatus = 0;

  do
  {
 /* while the UART_RxFIFO is empty  */
    while (!((wStatus=UARTx->SR) & (UART_RxHalfFull|UART_RxBufFull)));

 /* then read the RxBUFR */
    *(pSTRING++) = (u8)UARTx->RxBUFR;

  } while((*(pSTRING - 1)!=0x0D)&(*(pSTRING - 1)!='\0'));

  *(pSTRING - 1)='\0';

  return wStatus;
}

#ifdef USE_SERIAL_PORT
/*******************************************************************************
* Function Name  : sendchar
* Description    : This function sends a character to the selected UART.
* Input 1        : A pointer on the character to send.
* Output         : None
* Return         : None
*******************************************************************************/
void sendchar( char *ch )
{
   #ifdef USE_UART0
     #define  UARTx  UART0
   #endif /* Use_UART0 */

   #ifdef USE_UART1
     #define  UARTx  UART1
   #endif /* Use_UART1 */

   #ifdef USE_UART2
     #define  UARTx  UART2
   #endif /* Use_UART2 */

   #ifdef USE_UART3
     #define  UARTx  UART3
   #endif /* Use_UART3 */

   UART_ByteSend(UARTx,(u8 *)ch);
}
#endif /* USE_SERIAL_PORT */

/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/