Matt Lloyd
Example of UART-DMA transfers taken form the npx cmsis driver libary
Diff: lpc17xx_uart.c
- Revision:
- 0:7480abd3b63b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_uart.c Thu Sep 30 20:13:24 2010 +0000
@@ -0,0 +1,1366 @@
+/***********************************************************************//**
+ * @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 = 0;
+ 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_UART_TypeDef *)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_UART_TypeDef *)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_UART_TypeDef *)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 = 0;
+
+ 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 = 0;
+
+ 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 ------------------------------ */
+