path: root/arch/arm/lpc17xx/Drivers/source/lpc17xx_uart.c

/***********************************************************************//**
 * @file		lpc17xx_uart.c
 * @brief		Contains all functions support for UART firmware library on LPC17xx
 * @version		3.0
 * @date		18. June. 2010
 * @author		NXP MCU SW Application Team
 **************************************************************************
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * products. This software is supplied "AS IS" without any warranties.
 * NXP Semiconductors assumes no responsibility or liability for the
 * use of the software, conveys no license or title under any patent,
 * copyright, or mask work right to the product. NXP Semiconductors
 * reserves the right to make changes in the software without
 * notification. NXP Semiconductors also make no representation or
 * warranty that such application will be suitable for the specified
 * use without further testing or modification.
 **********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup UART
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_uart.h"
#include "lpc17xx_clkpwr.h"

/* If this source file built with example, the LPC17xx FW library configuration
 * file in each example directory ("lpc17xx_libcfg.h") must be included,
 * otherwise the default FW library configuration file must be included instead
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */


#ifdef _UART

/* Private Functions ---------------------------------------------------------- */

static Status uart_set_divisors(LPC_UART_TypeDef *UARTx, uint32_t baudrate);


/*********************************************************************//**
 * @brief		Determines best dividers to get a target clock rate
 * @param[in]	UARTx	Pointer to selected UART peripheral, should be:
 * 				- LPC_UART0: UART0 peripheral
 * 				- LPC_UART1: UART1 peripheral
 * 				- LPC_UART2: UART2 peripheral
 * 				- LPC_UART3: UART3 peripheral
 * @param[in]	baudrate Desired UART baud rate.
 * @return 		Error status, could be:
 * 				- SUCCESS
 * 				- ERROR
 **********************************************************************/
static Status uart_set_divisors(LPC_UART_TypeDef *UARTx, uint32_t baudrate)
{
	Status errorStatus = ERROR;

	uint32_t uClk;
	uint32_t calcBaudrate = 0;
	uint32_t temp = 0;

	uint32_t mulFracDiv, dividerAddFracDiv;
	uint32_t diviser = 0 ;
	uint32_t mulFracDivOptimal = 1;
	uint32_t dividerAddOptimal = 0;
	uint32_t diviserOptimal = 0;

	uint32_t relativeError = 0;
	uint32_t relativeOptimalError = 100000;

	/* get UART block clock */
	if (UARTx == LPC_UART0)
	{
		uClk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_UART0);
	}
	else if (UARTx == (LPC_UART_TypeDef *)LPC_UART1)
	{
		uClk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_UART1);
	}
	else if (UARTx == LPC_UART2)
	{
		uClk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_UART2);
	}
	else if (UARTx == LPC_UART3)
	{
		uClk = CLKPWR_GetPCLK (CLKPWR_PCLKSEL_UART3);
	}


	uClk = uClk >> 4; /* div by 16 */
	/* In the Uart IP block, baud rate is calculated using FDR and DLL-DLM registers
	* The formula is :
	* BaudRate= uClk * (mulFracDiv/(mulFracDiv+dividerAddFracDiv) / (16 * (DLL)
	* It involves floating point calculations. That's the reason the formulae are adjusted with
	* Multiply and divide method.*/
	/* The value of mulFracDiv and dividerAddFracDiv should comply to the following expressions:
	* 0 < mulFracDiv <= 15, 0 <= dividerAddFracDiv <= 15 */
	for (mulFracDiv = 1 ; mulFracDiv <= 15 ;mulFracDiv++)
	{
	for (dividerAddFracDiv = 0 ; dividerAddFracDiv <= 15 ;dividerAddFracDiv++)
	{
	  temp = (mulFracDiv * uClk) / ((mulFracDiv + dividerAddFracDiv));

	  diviser = temp / baudrate;
	  if ((temp % baudrate) > (baudrate / 2))
		diviser++;

	  if (diviser > 2 && diviser < 65536)
	  {
		calcBaudrate = temp / diviser;

		if (calcBaudrate <= baudrate)
		  relativeError = baudrate - calcBaudrate;
		else
		  relativeError = calcBaudrate - baudrate;

		if ((relativeError < relativeOptimalError))
		{
		  mulFracDivOptimal = mulFracDiv ;
		  dividerAddOptimal = dividerAddFracDiv;
		  diviserOptimal = diviser;
		  relativeOptimalError = relativeError;
		  if (relativeError == 0)
			break;
		}
	  } /* End of if */
	} /* end of inner for loop */
	if (relativeError == 0)
	  break;
	} /* end of outer for loop  */

	if (relativeOptimalError < ((baudrate * UART_ACCEPTED_BAUDRATE_ERROR)/100))
	{
		if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
		{
			((LPC_UART1_TypeDef *)UARTx)->LCR |= UART_LCR_DLAB_EN;
			((LPC_UART1_TypeDef *)UARTx)->/*DLIER.*/DLM = UART_LOAD_DLM(diviserOptimal);
			((LPC_UART1_TypeDef *)UARTx)->/*RBTHDLR.*/DLL = UART_LOAD_DLL(diviserOptimal);
			/* Then reset DLAB bit */
			((LPC_UART1_TypeDef *)UARTx)->LCR &= (~UART_LCR_DLAB_EN) & UART_LCR_BITMASK;
			((LPC_UART1_TypeDef *)UARTx)->FDR = (UART_FDR_MULVAL(mulFracDivOptimal) \
					| UART_FDR_DIVADDVAL(dividerAddOptimal)) & UART_FDR_BITMASK;
		}
		else
		{
			UARTx->LCR |= UART_LCR_DLAB_EN;
			UARTx->/*DLIER.*/DLM = UART_LOAD_DLM(diviserOptimal);
			UARTx->/*RBTHDLR.*/DLL = UART_LOAD_DLL(diviserOptimal);
			/* Then reset DLAB bit */
			UARTx->LCR &= (~UART_LCR_DLAB_EN) & UART_LCR_BITMASK;
			UARTx->FDR = (UART_FDR_MULVAL(mulFracDivOptimal) \
					| UART_FDR_DIVADDVAL(dividerAddOptimal)) & UART_FDR_BITMASK;
		}
		errorStatus = SUCCESS;
	}

	return errorStatus;
}

/* End of Private Functions ---------------------------------------------------- */


/* Public Functions ----------------------------------------------------------- */
/** @addtogroup UART_Public_Functions
 * @{
 */
/* UART Init/DeInit functions -------------------------------------------------*/
/********************************************************************//**
 * @brief		Initializes the UARTx peripheral according to the specified
 *               parameters in the UART_ConfigStruct.
 * @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]	UART_ConfigStruct Pointer to a UART_CFG_Type structure
*                    that contains the configuration information for the
*                    specified UART peripheral.
 * @return 		None
 *********************************************************************/
void UART_Init(LPC_UART_TypeDef *UARTx, UART_CFG_Type *UART_ConfigStruct)
{
	uint32_t tmp;

	// For debug mode
	CHECK_PARAM(PARAM_UARTx(UARTx));
	CHECK_PARAM(PARAM_UART_DATABIT(UART_ConfigStruct->Databits));
	CHECK_PARAM(PARAM_UART_STOPBIT(UART_ConfigStruct->Stopbits));
	CHECK_PARAM(PARAM_UART_PARITY(UART_ConfigStruct->Parity));

#ifdef _UART0
	if(UARTx == LPC_UART0)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART0, ENABLE);
	}
#endif

#ifdef _UART1
	if(((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART1, ENABLE);
	}
#endif

#ifdef _UART2
	if(UARTx == LPC_UART2)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART2, ENABLE);
	}
#endif

#ifdef _UART3
	if(UARTx == LPC_UART3)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART3, ENABLE);
	}
#endif

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		/* FIFOs are empty */
		((LPC_UART1_TypeDef *)UARTx)->/*IIFCR.*/FCR = ( UART_FCR_FIFO_EN \
				| UART_FCR_RX_RS | UART_FCR_TX_RS);
		// Disable FIFO
		((LPC_UART1_TypeDef *)UARTx)->/*IIFCR.*/FCR = 0;

		// Dummy reading
		while (((LPC_UART1_TypeDef *)UARTx)->LSR & UART_LSR_RDR)
		{
			tmp = ((LPC_UART1_TypeDef *)UARTx)->/*RBTHDLR.*/RBR;
		}

		((LPC_UART1_TypeDef *)UARTx)->TER = UART_TER_TXEN;
		// Wait for current transmit complete
		while (!(((LPC_UART1_TypeDef *)UARTx)->LSR & UART_LSR_THRE));
		// Disable Tx
		((LPC_UART1_TypeDef *)UARTx)->TER = 0;

		// Disable interrupt
		((LPC_UART1_TypeDef *)UARTx)->/*DLIER.*/IER = 0;
		// Set LCR to default state
		((LPC_UART1_TypeDef *)UARTx)->LCR = 0;
		// Set ACR to default state
		((LPC_UART1_TypeDef *)UARTx)->ACR = 0;
		// Set Modem Control to default state
		((LPC_UART1_TypeDef *)UARTx)->MCR = 0;
		// Set RS485 control to default state
		((LPC_UART1_TypeDef *)UARTx)->RS485CTRL = 0;
		// Set RS485 delay timer to default state
		((LPC_UART1_TypeDef *)UARTx)->RS485DLY = 0;
		// Set RS485 addr match to default state
		((LPC_UART1_TypeDef *)UARTx)->ADRMATCH = 0;
		//Dummy Reading to Clear Status
		tmp = ((LPC_UART1_TypeDef *)UARTx)->MSR;
		tmp = ((LPC_UART1_TypeDef *)UARTx)->LSR;
	}
	else
	{
		/* FIFOs are empty */
		UARTx->/*IIFCR.*/FCR = ( UART_FCR_FIFO_EN | UART_FCR_RX_RS | UART_FCR_TX_RS);
		// Disable FIFO
		UARTx->/*IIFCR.*/FCR = 0;

		// Dummy reading
		while (UARTx->LSR & UART_LSR_RDR)
		{
			tmp = UARTx->/*RBTHDLR.*/RBR;
		}

		UARTx->TER = UART_TER_TXEN;
		// Wait for current transmit complete
		while (!(UARTx->LSR & UART_LSR_THRE));
		// Disable Tx
		UARTx->TER = 0;

		// Disable interrupt
		UARTx->/*DLIER.*/IER = 0;
		// Set LCR to default state
		UARTx->LCR = 0;
		// Set ACR to default state
		UARTx->ACR = 0;
		// Dummy reading
		tmp = UARTx->LSR;
	}

	if (UARTx == LPC_UART3)
	{
		// Set IrDA to default state
		UARTx->ICR = 0;
	}

	// Set Line Control register ----------------------------

	uart_set_divisors(UARTx, (UART_ConfigStruct->Baud_rate));

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		tmp = (((LPC_UART1_TypeDef *)UARTx)->LCR & (UART_LCR_DLAB_EN | UART_LCR_BREAK_EN)) \
				& UART_LCR_BITMASK;
	}
	else
	{
		tmp = (UARTx->LCR & (UART_LCR_DLAB_EN | UART_LCR_BREAK_EN)) & UART_LCR_BITMASK;
	}

	switch (UART_ConfigStruct->Databits){
	case UART_DATABIT_5:
		tmp |= UART_LCR_WLEN5;
		break;
	case UART_DATABIT_6:
		tmp |= UART_LCR_WLEN6;
		break;
	case UART_DATABIT_7:
		tmp |= UART_LCR_WLEN7;
		break;
	case UART_DATABIT_8:
	default:
		tmp |= UART_LCR_WLEN8;
		break;
	}

	if (UART_ConfigStruct->Parity == UART_PARITY_NONE)
	{
		// Do nothing...
	}
	else
	{
		tmp |= UART_LCR_PARITY_EN;
		switch (UART_ConfigStruct->Parity)
		{
		case UART_PARITY_ODD:
			tmp |= UART_LCR_PARITY_ODD;
			break;

		case UART_PARITY_EVEN:
			tmp |= UART_LCR_PARITY_EVEN;
			break;

		case UART_PARITY_SP_1:
			tmp |= UART_LCR_PARITY_F_1;
			break;

		case UART_PARITY_SP_0:
			tmp |= UART_LCR_PARITY_F_0;
			break;
		default:
			break;
		}
	}

	switch (UART_ConfigStruct->Stopbits){
	case UART_STOPBIT_2:
		tmp |= UART_LCR_STOPBIT_SEL;
		break;
	case UART_STOPBIT_1:
	default:
		// Do no thing
		break;
	}


	// Write back to LCR, configure FIFO and Disable Tx
	if (((LPC_UART1_TypeDef *)UARTx) ==  LPC_UART1)
	{
		((LPC_UART1_TypeDef *)UARTx)->LCR = (uint8_t)(tmp & UART_LCR_BITMASK);
	}
	else
	{
		UARTx->LCR = (uint8_t)(tmp & UART_LCR_BITMASK);
	}
}

/*********************************************************************//**
 * @brief		De-initializes the UARTx peripheral registers to their
 *                  default reset values.
 * @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_DeInit(LPC_UART_TypeDef* UARTx)
{
	// For debug mode
	CHECK_PARAM(PARAM_UARTx(UARTx));

	UART_TxCmd(UARTx, DISABLE);

#ifdef _UART0
	if (UARTx == LPC_UART0)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART0, DISABLE);
	}
#endif

#ifdef _UART1
	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART1, DISABLE);
	}
#endif

#ifdef _UART2
	if (UARTx == LPC_UART2)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART2, DISABLE);
	}
#endif

#ifdef _UART3
	if (UARTx == LPC_UART3)
	{
		/* Set up clock and power for UART module */
		CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCUART3, DISABLE);
	}
#endif
}

/*****************************************************************************//**
* @brief		Fills each UART_InitStruct member with its default value:
* 				- 9600 bps
* 				- 8-bit data
* 				- 1 Stopbit
* 				- None Parity
* @param[in]	UART_InitStruct Pointer to a UART_CFG_Type structure
*                    which will be initialized.
* @return		None
*******************************************************************************/
void UART_ConfigStructInit(UART_CFG_Type *UART_InitStruct)
{
	UART_InitStruct->Baud_rate = 9600;
	UART_InitStruct->Databits = UART_DATABIT_8;
	UART_InitStruct->Parity = UART_PARITY_NONE;
	UART_InitStruct->Stopbits = UART_STOPBIT_1;
}

/* 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){
			tmp |= UART_ACR_MODE;
		}
		if (ABConfigStruct->AutoRestart == ENABLE){
			tmp |= UART_ACR_AUTO_RESTART;
		}
	}

	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		if (NewState == ENABLE)
		{
			// Clear DLL and DLM value
			((LPC_UART1_TypeDef *)UARTx)->LCR |= UART_LCR_DLAB_EN;
			((LPC_UART1_TypeDef *)UARTx)->DLL = 0;
			((LPC_UART1_TypeDef *)UARTx)->DLM = 0;
			((LPC_UART1_TypeDef *)UARTx)->LCR &= ~UART_LCR_DLAB_EN;
			// FDR value must be reset to default value
			((LPC_UART1_TypeDef *)UARTx)->FDR = 0x10;
			((LPC_UART1_TypeDef *)UARTx)->ACR = UART_ACR_START | tmp;
		}
		else
		{
			((LPC_UART1_TypeDef *)UARTx)->ACR = 0;
		}
	}
	else
	{
		if (NewState == ENABLE)
		{
			// Clear DLL and DLM value
			UARTx->LCR |= UART_LCR_DLAB_EN;
			UARTx->DLL = 0;
			UARTx->DLM = 0;
			UARTx->LCR &= ~UART_LCR_DLAB_EN;
			// FDR value must be reset to default value
			UARTx->FDR = 0x10;
			UARTx->ACR = UART_ACR_START | tmp;
		}
		else
		{
			UARTx->ACR = 0;
		}
	}
}

/*********************************************************************//**
 * @brief		Clear Autobaud Interrupt Pending
 * @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]	ABIntType	type of auto-baud interrupt, should be:
 * 				- UART_AUTOBAUD_INTSTAT_ABEO: End of Auto-baud interrupt
 * 				- UART_AUTOBAUD_INTSTAT_ABTO: Auto-baud time out interrupt
 * @return 		none
 **********************************************************************/
void UART_ABClearIntPending(LPC_UART_TypeDef *UARTx, UART_ABEO_Type ABIntType)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));
	if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
	{
		UARTx->ACR |= ABIntType;
	}
	else
		UARTx->ACR |= ABIntType;
}

/*********************************************************************//**
 * @brief		Enable/Disable transmission on UART TxD pin
 * @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]	NewState New State of Tx transmission function, should be:
 * 				- ENABLE: Enable this function
				- DISABLE: Disable this function
 * @return none
 **********************************************************************/
void UART_TxCmd(LPC_UART_TypeDef *UARTx, FunctionalState NewState)
{
	CHECK_PARAM(PARAM_UARTx(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	if (NewState == ENABLE)
	{
		if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
		{
			((LPC_UART1_TypeDef *)UARTx)->TER |= UART_TER_TXEN;
		}
		else
		{
			UARTx->TER |= UART_TER_TXEN;
		}
	}
	else
	{
		if (((LPC_UART1_TypeDef *)UARTx) == LPC_UART1)
		{
			((LPC_UART1_TypeDef *)UARTx)->TER &= (~UART_TER_TXEN) & UART_TER_BITMASK;
		}
		else
		{
			UARTx->TER &= (~UART_TER_TXEN) & UART_TER_BITMASK;
		}
	}
}

/* UART IrDA functions ---------------------------------------------------*/

#ifdef _UART3

/*********************************************************************//**
 * @brief		Enable or disable inverting serial input function of IrDA
 * 				on UART peripheral.
 * @param[in]	UARTx UART peripheral selected, should be LPC_UART3 (only)
 * @param[in]	NewState New state of inverting serial input, should be:
 * 				- ENABLE: Enable this function.
 * 				- DISABLE: Disable this function.
 * @return none
 **********************************************************************/
void UART_IrDAInvtInputCmd(LPC_UART_TypeDef* UARTx, FunctionalState NewState)
{
	CHECK_PARAM(PARAM_UART_IrDA(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	if (NewState == ENABLE)
	{
		UARTx->ICR |= UART_ICR_IRDAINV;
	}
	else if (NewState == DISABLE)
	{
		UARTx->ICR &= (~UART_ICR_IRDAINV) & UART_ICR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief		Enable or disable IrDA function on UART peripheral.
 * @param[in]	UARTx UART peripheral selected, should be LPC_UART3 (only)
 * @param[in]	NewState New state of IrDA function, should be:
 * 				- ENABLE: Enable this function.
 * 				- DISABLE: Disable this function.
 * @return none
 **********************************************************************/
void UART_IrDACmd(LPC_UART_TypeDef* UARTx, FunctionalState NewState)
{
	CHECK_PARAM(PARAM_UART_IrDA(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	if (NewState == ENABLE)
	{
		UARTx->ICR |= UART_ICR_IRDAEN;
	}
	else
	{
		UARTx->ICR &= (~UART_ICR_IRDAEN) & UART_ICR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief		Configure Pulse divider for IrDA function on UART peripheral.
 * @param[in]	UARTx UART peripheral selected, should be LPC_UART3 (only)
 * @param[in]	PulseDiv Pulse Divider value from Peripheral clock,
 * 				should be one of the following:
				- UART_IrDA_PULSEDIV2 	: Pulse width = 2 * Tpclk
				- UART_IrDA_PULSEDIV4 	: Pulse width = 4 * Tpclk
				- UART_IrDA_PULSEDIV8 	: Pulse width = 8 * Tpclk
				- UART_IrDA_PULSEDIV16 	: Pulse width = 16 * Tpclk
				- UART_IrDA_PULSEDIV32 	: Pulse width = 32 * Tpclk
				- UART_IrDA_PULSEDIV64 	: Pulse width = 64 * Tpclk
				- UART_IrDA_PULSEDIV128 : Pulse width = 128 * Tpclk
				- UART_IrDA_PULSEDIV256 : Pulse width = 256 * Tpclk

 * @return none
 **********************************************************************/
void UART_IrDAPulseDivConfig(LPC_UART_TypeDef *UARTx, UART_IrDA_PULSE_Type PulseDiv)
{
	uint32_t tmp, tmp1;
	CHECK_PARAM(PARAM_UART_IrDA(UARTx));
	CHECK_PARAM(PARAM_UART_IrDA_PULSEDIV(PulseDiv));

	tmp1 = UART_ICR_PULSEDIV(PulseDiv);
	tmp = UARTx->ICR & (~UART_ICR_PULSEDIV(7));
	tmp |= tmp1 | UART_ICR_FIXPULSE_EN;
	UARTx->ICR = tmp & UART_ICR_BITMASK;
}

#endif


/* UART1 FullModem function ---------------------------------------------*/

#ifdef _UART1

/*********************************************************************//**
 * @brief		Force pin DTR/RTS corresponding to given state (Full modem mode)
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	Pin	Pin that NewState will be applied to, should be:
 * 				- UART1_MODEM_PIN_DTR: DTR pin.
 * 				- UART1_MODEM_PIN_RTS: RTS pin.
 * @param[in]	NewState New State of DTR/RTS pin, should be:
 * 				- INACTIVE: Force the pin to inactive signal.
				- ACTIVE: Force the pin to active signal.
 * @return none
 **********************************************************************/
void UART_FullModemForcePinState(LPC_UART1_TypeDef *UARTx, UART_MODEM_PIN_Type Pin, \
							UART1_SignalState NewState)
{
	uint8_t tmp = 0;

	CHECK_PARAM(PARAM_UART1_MODEM(UARTx));
	CHECK_PARAM(PARAM_UART1_MODEM_PIN(Pin));
	CHECK_PARAM(PARAM_UART1_SIGNALSTATE(NewState));

	switch (Pin){
	case UART1_MODEM_PIN_DTR:
		tmp = UART1_MCR_DTR_CTRL;
		break;
	case UART1_MODEM_PIN_RTS:
		tmp = UART1_MCR_RTS_CTRL;
		break;
	default:
		break;
	}

	if (NewState == ACTIVE){
		UARTx->MCR |= tmp;
	} else {
		UARTx->MCR &= (~tmp) & UART1_MCR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief		Configure Full Modem mode for UART peripheral
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	Mode Full Modem mode, should be:
 * 				- UART1_MODEM_MODE_LOOPBACK: Loop back mode.
 * 				- UART1_MODEM_MODE_AUTO_RTS: Auto-RTS mode.
 * 				- UART1_MODEM_MODE_AUTO_CTS: Auto-CTS mode.
 * @param[in]	NewState New State of this mode, should be:
 * 				- ENABLE: Enable this mode.
				- DISABLE: Disable this mode.
 * @return none
 **********************************************************************/
void UART_FullModemConfigMode(LPC_UART1_TypeDef *UARTx, UART_MODEM_MODE_Type Mode, \
							FunctionalState NewState)
{
	uint8_t tmp;

	CHECK_PARAM(PARAM_UART1_MODEM(UARTx));
	CHECK_PARAM(PARAM_UART1_MODEM_MODE(Mode));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

	switch(Mode){
	case UART1_MODEM_MODE_LOOPBACK:
		tmp = UART1_MCR_LOOPB_EN;
		break;
	case UART1_MODEM_MODE_AUTO_RTS:
		tmp = UART1_MCR_AUTO_RTS_EN;
		break;
	case UART1_MODEM_MODE_AUTO_CTS:
		tmp = UART1_MCR_AUTO_CTS_EN;
		break;
	default:
		break;
	}

	if (NewState == ENABLE)
	{
		UARTx->MCR |= tmp;
	}
	else
	{
		UARTx->MCR &= (~tmp) & UART1_MCR_BITMASK;
	}
}


/*********************************************************************//**
 * @brief		Get current status of modem status register
 * @param[in]	UARTx	LPC_UART1 (only)
 * @return 		Current value of modem status register
 * Note:	The return value of this function must be ANDed with each member
 * 			UART_MODEM_STAT_type enumeration to determine current flag status
 * 			corresponding to each modem flag status. Because some flags in
 * 			modem status register will be cleared after reading, the next reading
 * 			modem register could not be correct. So this function used to
 * 			read modem status register in one time only, then the return value
 * 			used to check all flags.
 **********************************************************************/
uint8_t UART_FullModemGetStatus(LPC_UART1_TypeDef *UARTx)
{
	CHECK_PARAM(PARAM_UART1_MODEM(UARTx));
	return ((UARTx->MSR) & UART1_MSR_BITMASK);
}


/* UART RS485 functions --------------------------------------------------------------*/

/*********************************************************************//**
 * @brief		Configure UART peripheral in RS485 mode according to the specified
*               parameters in the RS485ConfigStruct.
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	RS485ConfigStruct Pointer to a UART1_RS485_CTRLCFG_Type structure
*                    that contains the configuration information for specified UART
*                    in RS485 mode.
 * @return		None
 **********************************************************************/
void UART_RS485Config(LPC_UART1_TypeDef *UARTx, UART1_RS485_CTRLCFG_Type *RS485ConfigStruct)
{
	uint32_t tmp;

	CHECK_PARAM(PARAM_UART1_MODEM(UARTx));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(RS485ConfigStruct->AutoAddrDetect_State));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(RS485ConfigStruct->AutoDirCtrl_State));
	CHECK_PARAM(PARAM_UART1_RS485_CFG_DELAYVALUE(RS485ConfigStruct->DelayValue));
	CHECK_PARAM(PARAM_SETSTATE(RS485ConfigStruct->DirCtrlPol_Level));
	CHECK_PARAM(PARAM_UART_RS485_DIRCTRL_PIN(RS485ConfigStruct->DirCtrlPin));
	CHECK_PARAM(PARAM_UART1_RS485_CFG_MATCHADDRVALUE(RS485ConfigStruct->MatchAddrValue));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(RS485ConfigStruct->NormalMultiDropMode_State));
	CHECK_PARAM(PARAM_FUNCTIONALSTATE(RS485ConfigStruct->Rx_State));

	tmp = 0;
	// If Auto Direction Control is enabled -  This function is used in Master mode
	if (RS485ConfigStruct->AutoDirCtrl_State == ENABLE)
	{
		tmp |= UART1_RS485CTRL_DCTRL_EN;

		// Set polar
		if (RS485ConfigStruct->DirCtrlPol_Level == SET)
		{
			tmp |= UART1_RS485CTRL_OINV_1;
		}

		// Set pin according to
		if (RS485ConfigStruct->DirCtrlPin == UART1_RS485_DIRCTRL_DTR)
		{
			tmp |= UART1_RS485CTRL_SEL_DTR;
		}

		// Fill delay time
		UARTx->RS485DLY = RS485ConfigStruct->DelayValue & UART1_RS485DLY_BITMASK;
	}

	// MultiDrop mode is enable
	if (RS485ConfigStruct->NormalMultiDropMode_State == ENABLE)
	{
		tmp |= UART1_RS485CTRL_NMM_EN;
	}

	// Auto Address Detect function
	if (RS485ConfigStruct->AutoAddrDetect_State == ENABLE)
	{
		tmp |= UART1_RS485CTRL_AADEN;
		// Fill Match Address
		UARTx->ADRMATCH = RS485ConfigStruct->MatchAddrValue & UART1_RS485ADRMATCH_BITMASK;
	}


	// Receiver is disable
	if (RS485ConfigStruct->Rx_State == DISABLE)
	{
		tmp |= UART1_RS485CTRL_RX_DIS;
	}

	// write back to RS485 control register
	UARTx->RS485CTRL = tmp & UART1_RS485CTRL_BITMASK;

	// Enable Parity function and leave parity in stick '0' parity as default
	UARTx->LCR |= (UART_LCR_PARITY_F_0 | UART_LCR_PARITY_EN);
}

/*********************************************************************//**
 * @brief		Enable/Disable receiver in RS485 module in UART1
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	NewState	New State of command, should be:
 * 							- ENABLE: Enable this function.
 * 							- DISABLE: Disable this function.
 * @return		None
 **********************************************************************/
void UART_RS485ReceiverCmd(LPC_UART1_TypeDef *UARTx, FunctionalState NewState)
{
	if (NewState == ENABLE){
		UARTx->RS485CTRL &= ~UART1_RS485CTRL_RX_DIS;
	} else {
		UARTx->RS485CTRL |= UART1_RS485CTRL_RX_DIS;
	}
}

/*********************************************************************//**
 * @brief		Send data on RS485 bus with specified parity stick value (9-bit mode).
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	pDatFrm 	Pointer to data frame.
 * @param[in]	size		Size of data.
 * @param[in]	ParityStick	Parity Stick value, should be 0 or 1.
 * @return		None
 **********************************************************************/
uint32_t UART_RS485Send(LPC_UART1_TypeDef *UARTx, uint8_t *pDatFrm, \
					uint32_t size, uint8_t ParityStick)
{
	uint8_t tmp, save;
	uint32_t cnt;

	if (ParityStick){
		save = tmp = UARTx->LCR & UART_LCR_BITMASK;
		tmp &= ~(UART_LCR_PARITY_EVEN);
		UARTx->LCR = tmp;
		cnt = UART_Send((LPC_UART_TypeDef *)UARTx, pDatFrm, size, BLOCKING);
		while (!(UARTx->LSR & UART_LSR_TEMT));
		UARTx->LCR = save;
	} else {
		cnt = UART_Send((LPC_UART_TypeDef *)UARTx, pDatFrm, size, BLOCKING);
		while (!(UARTx->LSR & UART_LSR_TEMT));
	}
	return cnt;
}

/*********************************************************************//**
 * @brief		Send Slave address frames on RS485 bus.
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	SlvAddr Slave Address.
 * @return		None
 **********************************************************************/
void UART_RS485SendSlvAddr(LPC_UART1_TypeDef *UARTx, uint8_t SlvAddr)
{
	UART_RS485Send(UARTx, &SlvAddr, 1, 1);
}

/*********************************************************************//**
 * @brief		Send Data frames on RS485 bus.
 * @param[in]	UARTx	LPC_UART1 (only)
 * @param[in]	pData Pointer to data to be sent.
 * @param[in]	size Size of data frame to be sent.
 * @return		None
 **********************************************************************/
uint32_t UART_RS485SendData(LPC_UART1_TypeDef *UARTx, uint8_t *pData, uint32_t size)
{
	return (UART_RS485Send(UARTx, pData, size, 0));
}

#endif /* _UART1 */

#endif /* _UART */

/**
 * @}
 */

/**
 * @}
 */
/* --------------------------------- End Of File ------------------------------ */