lpc17xx_uart.c
1376 lines
| 41.7 KiB
| text/x-c
|
CLexer
|
r16 | /********************************************************************** | ||
* $Id$ lpc17xx_uart.c 2011-06-06 | ||||
*//** | ||||
* @file lpc17xx_uart.c | ||||
* @brief Contains all functions support for UART firmware library | ||||
* on LPC17xx | ||||
* @version 3.2 | ||||
* @date 25. July. 2011 | ||||
* @author NXP MCU SW Application Team | ||||
* | ||||
* Copyright(C) 2011, NXP Semiconductor | ||||
* All rights reserved. | ||||
* | ||||
*********************************************************************** | ||||
* 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 d, m, bestd, bestm, tmp; | ||||
uint64_t best_divisor, divisor; | ||||
uint32_t current_error, best_error; | ||||
uint32_t recalcbaud; | ||||
/* 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); | ||||
} | ||||
/* 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 */ | ||||
best_error = 0xFFFFFFFF; /* Worst case */ | ||||
bestd = 0; | ||||
bestm = 0; | ||||
best_divisor = 0; | ||||
for (m = 1 ; m <= 15 ;m++) | ||||
{ | ||||
for (d = 0 ; d < m ; d++) | ||||
{ | ||||
divisor = ((uint64_t)uClk<<28)*m/(baudrate*(m+d)); | ||||
current_error = divisor & 0xFFFFFFFF; | ||||
tmp = divisor>>32; | ||||
/* Adjust error */ | ||||
if(current_error > ((uint32_t)1<<31)){ | ||||
current_error = -current_error; | ||||
tmp++; | ||||
} | ||||
if(tmp<1 || tmp>65536) /* Out of range */ | ||||
continue; | ||||
if( current_error < best_error){ | ||||
best_error = current_error; | ||||
best_divisor = tmp; | ||||
bestd = d; | ||||
bestm = m; | ||||
if(best_error == 0) break; | ||||
} | ||||
} /* end of inner for loop */ | ||||
if (best_error == 0) | ||||
break; | ||||
} /* end of outer for loop */ | ||||
if(best_divisor == 0) return ERROR; /* can not find best match */ | ||||
recalcbaud = (uClk>>4) * bestm/(best_divisor * (bestm + bestd)); | ||||
/* reuse best_error to evaluate baud error*/ | ||||
if(baudrate>recalcbaud) best_error = baudrate - recalcbaud; | ||||
else best_error = recalcbaud -baudrate; | ||||
best_error = best_error * 100 / baudrate; | ||||
if (best_error < UART_ACCEPTED_BAUDRATE_ERROR) | ||||
{ | ||||
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(best_divisor); | ||||
((LPC_UART1_TypeDef *)UARTx)->/*RBTHDLR.*/DLL = UART_LOAD_DLL(best_divisor); | ||||
/* Then reset DLAB bit */ | ||||
((LPC_UART1_TypeDef *)UARTx)->LCR &= (~UART_LCR_DLAB_EN) & UART_LCR_BITMASK; | ||||
((LPC_UART1_TypeDef *)UARTx)->FDR = (UART_FDR_MULVAL(bestm) \ | ||||
| UART_FDR_DIVADDVAL(bestd)) & UART_FDR_BITMASK; | ||||
} | ||||
else | ||||
{ | ||||
UARTx->LCR |= UART_LCR_DLAB_EN; | ||||
UARTx->/*DLIER.*/DLM = UART_LOAD_DLM(best_divisor); | ||||
UARTx->/*RBTHDLR.*/DLL = UART_LOAD_DLL(best_divisor); | ||||
/* Then reset DLAB bit */ | ||||
UARTx->LCR &= (~UART_LCR_DLAB_EN) & UART_LCR_BITMASK; | ||||
UARTx->FDR = (UART_FDR_MULVAL(bestm) \ | ||||
| UART_FDR_DIVADDVAL(bestd)) & 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 ------------------------------ */ | ||||