lpc17xx_uart.c

uCOSII_lwip_lpc1768

/* UART Send/Recieve functions -------------------------------------------------*/
/*********************************************************************//**
 * @brief		Transmit a single data through UART peripheral
 * @param[in]	UARTx	UART peripheral selected, should be:
 *   			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	Data	Data to transmit (must be 8-bit long)
 * @return 		None
 **********************************************************************/
void UART_SendByte(LPC_UART_TypeDef* UARTx, uint8_t Data)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		((LPC_UART1_TypeDef *)UARTx)->/*RBTHDLR.*/THR = Data & UART_THR_MASKBIT;
	}
	else
	{
		UARTx->/*RBTHDLR.*/THR = Data & UART_THR_MASKBIT;
	}

}


/*********************************************************************//**
 * @brief		Receive a single data from UART peripheral
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @return 		Data received
 **********************************************************************/
uint8_t UART_ReceiveByte(LPC_UART_TypeDef* UARTx)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		return (((LPC_UART1_TypeDef *)UARTx)->/*RBTHDLR.*/RBR & UART_RBR_MASKBIT);
	}
	else
	{
		return (UARTx->/*RBTHDLR.*/RBR & UART_RBR_MASKBIT);
	}
}

/*********************************************************************//**
 * @brief		Send a block of data via UART peripheral
 * @param[in]	UARTx	Selected UART peripheral used to send data, should be:
 *   			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	txbuf 	Pointer to Transmit buffer
 * @param[in]	buflen 	Length of Transmit buffer
 * @param[in] 	flag 	Flag used in  UART transfer, should be
 * 						NONE_BLOCKING or BLOCKING
 * @return 		Number of bytes sent.
 *
 * Note: when using UART in BLOCKING mode, a time-out condition is used
 * via defined symbol UART_BLOCKING_TIMEOUT.
 **********************************************************************/
uint32_t UART_Send(LPC_UART_TypeDef *UARTx, uint8_t *txbuf,
		uint32_t buflen, TRANSFER_BLOCK_Type flag)
{
	uint32_t bToSend, bSent, timeOut, fifo_cnt;
	uint8_t *pChar = txbuf;

	bToSend = buflen;

	// blocking mode
	if (flag == BLOCKING) {
		bSent = 0;
		while (bToSend){
			timeOut = UART_BLOCKING_TIMEOUT;
			// Wait for THR empty with timeout
			while (!(UARTx->LSR & UART_LSR_THRE)) {
				if (timeOut == 0) break;
				timeOut--;
			}
			// Time out!
			if(timeOut == 0) break;
			fifo_cnt = UART_TX_FIFO_SIZE;
			while (fifo_cnt && bToSend){
				UART_SendByte(UARTx, (*pChar++));
				fifo_cnt--;
				bToSend--;
				bSent++;
			}
		}
	}
	// None blocking mode
	else {
		bSent = 0;
		while (bToSend) {
			if (!(UARTx->LSR & UART_LSR_THRE)){
				break;
			}
			fifo_cnt = UART_TX_FIFO_SIZE;
			while (fifo_cnt && bToSend) {
				UART_SendByte(UARTx, (*pChar++));
				bToSend--;
				fifo_cnt--;
				bSent++;
			}
		}
	}
	return bSent;
}

/*********************************************************************//**
 * @brief		Receive a block of data via UART peripheral
 * @param[in]	UARTx	Selected UART peripheral used to send data,
 * 				should be:
 *   			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[out]	rxbuf 	Pointer to Received buffer
 * @param[in]	buflen 	Length of Received buffer
 * @param[in] 	flag 	Flag mode, should be NONE_BLOCKING or BLOCKING

 * @return 		Number of bytes received
 *
 * Note: when using UART in BLOCKING mode, a time-out condition is used
 * via defined symbol UART_BLOCKING_TIMEOUT.
 **********************************************************************/
uint32_t UART_Receive(LPC_UART_TypeDef *UARTx, uint8_t *rxbuf, \
		uint32_t buflen, TRANSFER_BLOCK_Type flag)
{
	uint32_t bToRecv, bRecv, timeOut;
	uint8_t *pChar = rxbuf;

	bToRecv = buflen;

	// Blocking mode
	if (flag == BLOCKING) {
		bRecv = 0;
		while (bToRecv){
			timeOut = UART_BLOCKING_TIMEOUT;
			while (!(UARTx->LSR & UART_LSR_RDR)){
				if (timeOut == 0) break;
				timeOut--;
			}
			// Time out!
			if(timeOut == 0) break;
			// Get data from the buffer
			(*pChar++) = UART_ReceiveByte(UARTx);
			bToRecv--;
			bRecv++;
		}
	}
	// None blocking mode
	else {
		bRecv = 0;
		while (bToRecv) {
			if (!(UARTx->LSR & UART_LSR_RDR)) {
				break;
			} else {
				(*pChar++) = UART_ReceiveByte(UARTx);
				bRecv++;
				bToRecv--;
			}
		}
	}
	return bRecv;
}

/*********************************************************************//**
 * @brief		Force BREAK character on UART line, output pin UARTx TXD is
				forced to logic 0.
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @return 		None
 **********************************************************************/
void UART_ForceBreak(LPC_UART_TypeDef* UARTx)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		((LPC_UART1_TypeDef *)UARTx)->LCR |= UART_LCR_BREAK_EN;
	}
	else
	{
		UARTx->LCR |= UART_LCR_BREAK_EN;
	}
}


/********************************************************************//**
 * @brief 		Enable or disable specified UART interrupt.
 * @param[in]	UARTx	UART peripheral selected, should be
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	UARTIntCfg	Specifies the interrupt flag,
 * 				should be one of the following:
				- UART_INTCFG_RBR 	:  RBR Interrupt enable
				- UART_INTCFG_THRE 	:  THR Interrupt enable
				- UART_INTCFG_RLS 	:  RX line status interrupt enable
				- UART1_INTCFG_MS	:  Modem status interrupt enable (UART1 only)
				- UART1_INTCFG_CTS	:  CTS1 signal transition interrupt enable (UART1 only)
				- UART_INTCFG_ABEO 	:  Enables the end of auto-baud interrupt
				- UART_INTCFG_ABTO 	:  Enables the auto-baud time-out interrupt
 * @param[in]	NewState New state of specified UART interrupt type,
 * 				should be:
 * 				- ENALBE: Enable this UART interrupt type.
* 				- DISALBE: Disable this UART interrupt type.
 * @return 		None
 *********************************************************************/
void UART_IntConfig(LPC_UART_TypeDef *UARTx, UART_INT_Type UARTIntCfg, FunctionalState NewState)
{
	uint32_t tmp;

	CHECK_PARAM(PARAM_UARTx(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	switch(UARTIntCfg){
		case UART_INTCFG_RBR:
			tmp = UART_IER_RBRINT_EN;
			break;
		case UART_INTCFG_THRE:
			tmp = UART_IER_THREINT_EN;
			break;
		case UART_INTCFG_RLS:
			tmp = UART_IER_RLSINT_EN;
			break;
		case UART1_INTCFG_MS:
			tmp = UART1_IER_MSINT_EN;
			break;
		case UART1_INTCFG_CTS:
			tmp = UART1_IER_CTSINT_EN;
			break;
		case UART_INTCFG_ABEO:
			tmp = UART_IER_ABEOINT_EN;
			break;
		case UART_INTCFG_ABTO:
			tmp = UART_IER_ABTOINT_EN;
			break;
	}

	if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1)
	{
		CHECK_PARAM((PARAM_UART_INTCFG(UARTIntCfg)) || (PARAM_UART1_INTCFG(UARTIntCfg)));
	}
	else
	{
		CHECK_PARAM(PARAM_UART_INTCFG(UARTIntCfg));
	}

	if (NewState == ENABLE)
	{
		if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1)
		{
			((LPC_UART1_TypeDef *)UARTx)->/*DLIER.*/IER |= tmp;
		}
		else
		{
			UARTx->/*DLIER.*/IER |= tmp;
		}
	}
	else
	{
		if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1)
		{
			((LPC_UART1_TypeDef *)UARTx)->/*DLIER.*/IER &= (~tmp) & UART1_IER_BITMASK;
		}
		else
		{
			UARTx->/*DLIER.*/IER &= (~tmp) & UART_IER_BITMASK;
		}
	}
}


/********************************************************************//**
 * @brief 		Get current value of Line Status register in UART peripheral.
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @return		Current value of Line Status register in UART peripheral.
 * Note:	The return value of this function must be ANDed with each member in
 * 			UART_LS_Type enumeration to determine current flag status
 * 			corresponding to each Line status type. Because some flags in
 * 			Line Status register will be cleared after reading, the next reading
 * 			Line Status register could not be correct. So this function used to
 * 			read Line status register in one time only, then the return value
 * 			used to check all flags.
 *********************************************************************/
uint8_t UART_GetLineStatus(LPC_UART_TypeDef* UARTx)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		return ((((LPC_UART1_TypeDef *)LPC_UART1)->LSR) & UART_LSR_BITMASK);
	}
	else
	{
		return ((UARTx->LSR) & UART_LSR_BITMASK);
	}
}

/********************************************************************//**
 * @brief 		Get Interrupt Identification value
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @return		Current value of UART UIIR register in UART peripheral.
 *********************************************************************/
uint32_t UART_GetIntId(LPC_UART_TypeDef* UARTx)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));
	return (UARTx->IIR & 0x03CF);
}

/*********************************************************************//**
 * @brief		Check whether if UART is busy or not
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @return		RESET if UART is not busy, otherwise return SET.
 **********************************************************************/
FlagStatus UART_CheckBusy(LPC_UART_TypeDef *UARTx)
{
	if (UARTx->LSR & UART_LSR_TEMT){
		return RESET;
	} else {
		return SET;
	}
}


/*********************************************************************//**
 * @brief		Configure FIFO function on selected UART peripheral
 * @param[in]	UARTx	UART peripheral selected, should be:
 *  			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	FIFOCfg	Pointer to a UART_FIFO_CFG_Type Structure that
 * 						contains specified information about FIFO configuration
 * @return 		none
 **********************************************************************/
void UART_FIFOConfig(LPC_UART_TypeDef *UARTx, UART_FIFO_CFG_Type *FIFOCfg)
{
	uint8_t tmp = 0;

	CHECK_PARAM(PARAM_UARTx(UARTx));
	CHECK_PARAM(PARAM_UART_FIFO_LEVEL(FIFOCfg->FIFO_Level));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(FIFOCfg->FIFO_DMAMode));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(FIFOCfg->FIFO_ResetRxBuf));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(FIFOCfg->FIFO_ResetTxBuf));

	tmp |= UART_FCR_FIFO_EN;
	switch (FIFOCfg->FIFO_Level){
	case UART_FIFO_TRGLEV0:
		tmp |= UART_FCR_TRG_LEV0;
		break;
	case UART_FIFO_TRGLEV1:
		tmp |= UART_FCR_TRG_LEV1;
		break;
	case UART_FIFO_TRGLEV2:
		tmp |= UART_FCR_TRG_LEV2;
		break;
	case UART_FIFO_TRGLEV3:
	default:
		tmp |= UART_FCR_TRG_LEV3;
		break;
	}

	if (FIFOCfg->FIFO_ResetTxBuf == ENABLE)
	{
		tmp |= UART_FCR_TX_RS;
	}
	if (FIFOCfg->FIFO_ResetRxBuf == ENABLE)
	{
		tmp |= UART_FCR_RX_RS;
	}
	if (FIFOCfg->FIFO_DMAMode == ENABLE)
	{
		tmp |= UART_FCR_DMAMODE_SEL;
	}


	//write to FIFO control register
	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		((LPC_UART1_TypeDef *)UARTx)->/*IIFCR.*/FCR = tmp & UART_FCR_BITMASK;
	}
	else
	{
		UARTx->/*IIFCR.*/FCR = tmp & UART_FCR_BITMASK;
	}
}

/*****************************************************************************//**
* @brief		Fills each UART_FIFOInitStruct member with its default value:
* 				- FIFO_DMAMode = DISABLE
* 				- FIFO_Level = UART_FIFO_TRGLEV0
* 				- FIFO_ResetRxBuf = ENABLE
* 				- FIFO_ResetTxBuf = ENABLE
* 				- FIFO_State = ENABLE

* @param[in]	UART_FIFOInitStruct Pointer to a UART_FIFO_CFG_Type structure
*                    which will be initialized.
* @return		None
*******************************************************************************/
void UART_FIFOConfigStructInit(UART_FIFO_CFG_Type *UART_FIFOInitStruct)
{
	UART_FIFOInitStruct->FIFO_DMAMode = DISABLE;
	UART_FIFOInitStruct->FIFO_Level = UART_FIFO_TRGLEV0;
	UART_FIFOInitStruct->FIFO_ResetRxBuf = ENABLE;
	UART_FIFOInitStruct->FIFO_ResetTxBuf = ENABLE;
}


/*********************************************************************//**
 * @brief		Start/Stop Auto Baudrate activity
 * @param[in]	UARTx	UART peripheral selected, should be
 *   			- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	ABConfigStruct	A pointer to UART_AB_CFG_Type structure that
 * 								contains specified information about UART
 * 								auto baudrate configuration
 * @param[in]	NewState New State of Auto baudrate activity, should be:
 * 				- ENABLE: Start this activity
 *				- DISABLE: Stop this activity
 * Note:		Auto-baudrate mode enable bit will be cleared once this mode
 * 				completed.
 * @return 		none
 **********************************************************************/
void UART_ABCmd(LPC_UART_TypeDef *UARTx, UART_AB_CFG_Type *ABConfigStruct, \
				FunctionalState NewState)
{
	uint32_t tmp;

	CHECK_PARAM(PARAM_UARTx(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	tmp = 0;
	if (NewState == ENABLE) {
		if (ABConfigStruct->ABMode == UART_AUTOBAUD_MODE1){