You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
172 lines
5.7 KiB
C
172 lines
5.7 KiB
C
/**********************************************************************
|
|
* $Id$ lpc17xx_exti.c 2010-06-18
|
|
*//**
|
|
* @file lpc17xx_exti.c
|
|
* @brief Contains all functions support for External interrupt firmware
|
|
* library on LPC17xx
|
|
* @version 3.0
|
|
* @date 18. June. 2010
|
|
* @author NXP MCU SW Application Team
|
|
*
|
|
* Copyright(C) 2010, 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.
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation is hereby granted, under NXP Semiconductors'
|
|
* relevant copyright in the software, without fee, provided that it
|
|
* is used in conjunction with NXP Semiconductors microcontrollers. This
|
|
* copyright, permission, and disclaimer notice must appear in all copies of
|
|
* this code.
|
|
**********************************************************************/
|
|
|
|
/* Peripheral group ----------------------------------------------------------- */
|
|
/** @addtogroup EXTI
|
|
* @{
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------- */
|
|
#include "lpc17xx_exti.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 _EXTI
|
|
|
|
/* Public Functions ----------------------------------------------------------- */
|
|
/** @addtogroup EXTI_Public_Functions
|
|
* @{
|
|
*/
|
|
|
|
/*********************************************************************//**
|
|
* @brief Initial for EXT
|
|
* - Set EXTINT, EXTMODE, EXTPOLAR registers to default value
|
|
* @param[in] None
|
|
* @return None
|
|
**********************************************************************/
|
|
void EXTI_Init(void)
|
|
{
|
|
LPC_SC->EXTINT = 0xF;
|
|
LPC_SC->EXTMODE = 0x0;
|
|
LPC_SC->EXTPOLAR = 0x0;
|
|
}
|
|
|
|
|
|
/*********************************************************************//**
|
|
* @brief Close EXT
|
|
* @param[in] None
|
|
* @return None
|
|
**********************************************************************/
|
|
void EXTI_DeInit(void)
|
|
{
|
|
;
|
|
}
|
|
|
|
/*********************************************************************//**
|
|
* @brief Configuration for EXT
|
|
* - Set EXTINT, EXTMODE, EXTPOLAR register
|
|
* @param[in] EXTICfg Pointer to a EXTI_InitTypeDef structure
|
|
* that contains the configuration information for the
|
|
* specified external interrupt
|
|
* @return None
|
|
**********************************************************************/
|
|
void EXTI_Config(EXTI_InitTypeDef *EXTICfg)
|
|
{
|
|
LPC_SC->EXTINT = 0x0;
|
|
EXTI_SetMode(EXTICfg->EXTI_Line, EXTICfg->EXTI_Mode);
|
|
EXTI_SetPolarity(EXTICfg->EXTI_Line, EXTICfg->EXTI_polarity);
|
|
}
|
|
|
|
/*********************************************************************//**
|
|
* @brief Set mode for EXTI pin
|
|
* @param[in] EXTILine external interrupt line, should be:
|
|
* - EXTI_EINT0: external interrupt line 0
|
|
* - EXTI_EINT1: external interrupt line 1
|
|
* - EXTI_EINT2: external interrupt line 2
|
|
* - EXTI_EINT3: external interrupt line 3
|
|
* @param[in] mode external mode, should be:
|
|
* - EXTI_MODE_LEVEL_SENSITIVE
|
|
* - EXTI_MODE_EDGE_SENSITIVE
|
|
* @return None
|
|
*********************************************************************/
|
|
void EXTI_SetMode(EXTI_LINE_ENUM EXTILine, EXTI_MODE_ENUM mode)
|
|
{
|
|
if(mode == EXTI_MODE_EDGE_SENSITIVE)
|
|
{
|
|
LPC_SC->EXTMODE |= (1 << EXTILine);
|
|
}
|
|
else if(mode == EXTI_MODE_LEVEL_SENSITIVE)
|
|
{
|
|
LPC_SC->EXTMODE &= ~(1 << EXTILine);
|
|
}
|
|
}
|
|
|
|
/*********************************************************************//**
|
|
* @brief Set polarity for EXTI pin
|
|
* @param[in] EXTILine external interrupt line, should be:
|
|
* - EXTI_EINT0: external interrupt line 0
|
|
* - EXTI_EINT1: external interrupt line 1
|
|
* - EXTI_EINT2: external interrupt line 2
|
|
* - EXTI_EINT3: external interrupt line 3
|
|
* @param[in] polarity external polarity value, should be:
|
|
* - EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE
|
|
* - EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE
|
|
* @return None
|
|
*********************************************************************/
|
|
void EXTI_SetPolarity(EXTI_LINE_ENUM EXTILine, EXTI_POLARITY_ENUM polarity)
|
|
{
|
|
if(polarity == EXTI_POLARITY_HIGH_ACTIVE_OR_RISING_EDGE)
|
|
{
|
|
LPC_SC->EXTPOLAR |= (1 << EXTILine);
|
|
}
|
|
else if(polarity == EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE)
|
|
{
|
|
LPC_SC->EXTPOLAR &= ~(1 << EXTILine);
|
|
}
|
|
}
|
|
|
|
/*********************************************************************//**
|
|
* @brief Clear External interrupt flag
|
|
* @param[in] EXTILine external interrupt line, should be:
|
|
* - EXTI_EINT0: external interrupt line 0
|
|
* - EXTI_EINT1: external interrupt line 1
|
|
* - EXTI_EINT2: external interrupt line 2
|
|
* - EXTI_EINT3: external interrupt line 3
|
|
* @return None
|
|
*********************************************************************/
|
|
void EXTI_ClearEXTIFlag(EXTI_LINE_ENUM EXTILine)
|
|
{
|
|
LPC_SC->EXTINT = (1 << EXTILine);
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* _EXTI */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* --------------------------------- End Of File ------------------------------ */
|
|
|