uart.c

FreeRTOSV4.1.0 安裝文件 FreeRTOS 是一个源码公开的免费的嵌入式实时操作系统

  else                  // if FIFO DISABLED
    while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
  UARTx->TxBUFR = *Data;
}

/*******************************************************************************
* 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 desired UART
* Input 2        : A pointer to 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 bits data bytes to the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired 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 desired UART
* Input 2        : A pointer to 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 desired UART
* Input 2        : A pointer to the buffer where the data will be stored
* Input 3        : The time-out period
* Output         : The received data
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_ByteReceive(UART_TypeDef *UARTx, u8 *Data, u8 TimeOut)
{
   u16 wStatus;
   UARTx->TOR=TimeOut;// reload the Timeout counter
   while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
   *Data = (u8)UARTx->RxBUFR; // then read the Receive Buffer Register
   return wStatus;
}

/*******************************************************************************
* Function Name  : UART_9BitByteReceive
* Description    : This function gets a 9 bits data byte from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
* Input 2        : A pointer to the buffer where the data will be stored
* Input 3        : The time-out period value
* Output         : The received data
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_9BitByteReceive(UART_TypeDef *UARTx, u16 *Data, u8 TimeOut)
{
  u16 wStatus;
  UARTx->TOR=TimeOut;// reload the Timeout counter
  while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
  *Data = (u16)UARTx->RxBUFR; // then read the 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 desired UART
* Input 2        : A pointer to the buffer where the data will be stored
* Input 3        : The data length
* Input 4        : The time-out period value
* Output         : The received data
* Return         : The UARTx.SR register contents
*******************************************************************************/
u16 UART_DataReceive(UART_TypeDef *UARTx, u8 *Data, u8 DataLength, u8 TimeOut)
{
  u16 wStatus;
  while(DataLength--)
    wStatus=UART_ByteReceive(UARTx,Data++,TimeOut);
  return wStatus;
}

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

/*******************************************************************************
* Function Name  : UART_StringReceive
* Description    : This function gets 8 bits data bytes from the selected UART.
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
* Input 2        : A pointer to 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;
  do
  {
    while (!((wStatus=UARTx->SR) & (UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
    *(pSTRING++) = (u8)UARTx->RxBUFR; // then read the 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 to 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****/