uart.c
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微处理器开发
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C/C++
- /******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
- * File Name : uart.c
- * Author : MCD Application Team
- * Date First Issued : 06/08/2003
- * Description : This file provides all the UART software functions
- ********************************************************************************
- * History:
- * 01/01/2004 : V1.2
- * 14/07/2004 : V1.3
- *******************************************************************************/
- #include "uart.h"
- /*******************************************************************************
- * Function Name : UART_Init
- * Description : This function initializes the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_Init(UART_TypeDef *UARTx)
- {
- UARTx->IER = 0x00;
- UARTx->CR = 0x00;
- (void)UARTx->RxBUFR;
- UARTx->RxRSTR = 0xFFFF;
- UARTx->TxRSTR = 0xFFFF;
- }
- /*******************************************************************************
- * Function Name : UART_BaudRateConfig
- * Description : This function configures the baud rate of the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : The baudrate value
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_BaudRateConfig(UART_TypeDef *UARTx, u32 BaudRate)
- {
- UARTx->BR = (u16)(RCCU_FrequencyValue(RCCU_FCLK)/(16*BaudRate));
- }
- /*******************************************************************************
- * Function Name : UART_Config
- * Description : This function configures the baudrate, the mode, the data
- * parity and the number of stop bits of the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : The baudrate value
- * Input 3 : The parity type
- * Input 4 : The number of stop bits
- * Input 5 : The UART mode
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_Config(UART_TypeDef *UARTx, u32 BaudRate, UARTParity_TypeDef Parity,
- UARTStopBits_TypeDef StopBits, UARTMode_TypeDef Mode)
- {
- UART_ModeConfig(UARTx, Mode);
- UART_BaudRateConfig(UARTx, BaudRate);
- UART_ParityConfig(UARTx, Parity);
- UART_StopBitsConfig(UARTx, StopBits);
- }
- /*******************************************************************************
- * Function Name : UART_ItConfig
- * Description : This function enables or disables the interrupts of the
- * selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : The new interrupt flag
- * Input 3 : ENABLE or DISABLE
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_ItConfig(UART_TypeDef *UARTx, u16 UART_Flag, FunctionalState NewState)
- {
- if (NewState==ENABLE) UARTx->IER|=UART_Flag; else UARTx->IER&=~UART_Flag;
- }
- /*******************************************************************************
- * Function Name : UART_FifoConfig
- * Description : This function enables or disables the Rx and Tx FIFOs of
- * the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : ENABLE or DISABLE
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_FifoConfig(UART_TypeDef *UARTx, FunctionalState NewState)
- {
- if (NewState==ENABLE) UARTx->CR|=0x0400; else UARTx->CR&=~0x0400;
- }
- /*******************************************************************************
- * Function Name : UART_FifoReset
- * Description : This function resets the Rx and the Tx FIFOs of the
- * selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : UART_RxFIFO or UART_TxFIFO
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_FifoReset(UART_TypeDef *UARTx, UARTFIFO_TypeDef FIFO)
- {
- if (FIFO==UART_RxFIFO) UARTx->RxRSTR=0xFFFF; else UARTx->TxRSTR=0xFFFF;
- }
- /*******************************************************************************
- * Function Name : UART_LoopBackConfig
- * Description : This function enables or disables the loop back mode of
- * the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : ENABLE or DISABLE
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_LoopBackConfig(UART_TypeDef *UARTx, FunctionalState NewState)
- {
- if (NewState==ENABLE) UARTx->CR|=0x0040; else UARTx->CR&=~0x0040;
- }
- /*******************************************************************************
- * Function Name : UART_RxConfig
- * Description : This function enables or disables the UART data reception.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : ENABLE or DISABLE
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_RxConfig(UART_TypeDef *UARTx, FunctionalState NewState)
- {
- if (NewState==ENABLE) UARTx->CR|=0x0100; else UARTx->CR&=~0x0100;
- }
- /*******************************************************************************
- * Function Name : UART_OnOffConfig
- * Description : This function sets On/Off the selected UART.
- * Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
- * Input 2 : ENABLE or DISABLE
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_OnOffConfig(UART_TypeDef *UARTx, FunctionalState NewState)
- {
- if (NewState==ENABLE) UARTx->CR|=0x0080; else UARTx->CR&=~0x0080;
- }
- /*******************************************************************************
- * Function Name : UART_ByteSend
- * Description : This function sends a data byte 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 byte to send
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_ByteSend(UART_TypeDef *UARTx, u8 *Data)
- {
- if (UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
- while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
- else // if FIFO DISABLED
- while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
- UARTx->TxBUFR = *Data;
- }
- /*******************************************************************************
- * Function Name : UART_9BitByteSend
- * Description : This function sends a 9 bits data byte 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
- * Output : None
- * Return : None
- *******************************************************************************/
- void UART_9BitByteSend(UART_TypeDef *UARTx, u16 *Data)
- {
- if(UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
- while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
- 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 != ' ')
- UART_ByteSend(UARTx, Data++);
- *Data=' ';
- 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)!=' '));
- *(pSTRING - 1)=' ';
- 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****/