/***********************************************************************//**
 * @file		lpc17xx_exti.h
 * @brief		Contains all macro definitions and function prototypes
 * 				support for External interrupt firmware library on LPC17xx
 * @version		2.0
 * @date		21. May. 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 ----------------------------------------------------------- */
/** @defgroup EXTI EXTI
 * @ingroup LPC1700CMSIS_FwLib_Drivers
 * @{
 */

#ifndef LPC17XX_EXTI_H_
#define LPC17XX_EXTI_H_

/* Includes ------------------------------------------------------------------- */
#include "LPC17xx.h"
#include "lpc_types.h"


#ifdef __cplusplus
extern "C"
{
#endif


/* Private Macros ------------------------------------------------------------- */
/** @defgroup EXTI_Private_Macros EXTI Private Macros
 * @{
 */
/*********************************************************************//**
 * Macro defines for EXTI  control register
 **********************************************************************/
#define EXTI_EINT0_BIT_MARK 	0x01
#define EXTI_EINT1_BIT_MARK 	0x02
#define EXTI_EINT2_BIT_MARK 	0x04
#define EXTI_EINT3_BIT_MARK 	0x08

/**
 * @}
 */

/* Private Macros ------------------------------------------------------------- */
/** @defgroup EXTI_Public_Types EXTI Public Types
 * @{
 */

/**
 * @brief EXTI external interrupt line option
 */
typedef enum
{
	EXTI_EINT0, /*!<  External interrupt 0, P2.10 */
	EXTI_EINT1, /*!<  External interrupt 0, P2.11 */
	EXTI_EINT2, /*!<  External interrupt 0, P2.12 */
	EXTI_EINT3 	/*!<  External interrupt 0, P2.13 */
} EXTI_LINE_ENUM;

/**
 * @brief EXTI mode option
 */
typedef enum
{
	EXTI_MODE_LEVEL_SENSITIVE, 	/*!< Level sensitivity is selected */
	EXTI_MODE_EDGE_SENSITIVE  	/*!< Edge sensitivity is selected */
} EXTI_MODE_ENUM;

/**
 * @brief EXTI polarity option
 */
typedef enum
{
	EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE,	/*!< Low active or falling edge sensitive
												depending on pin mode */
	EXTI_POLARITY_HIGH_ACTIVE_OR_RISING_EDGE	/*!< High active or rising edge sensitive
												depending on pin mode */
} EXTI_POLARITY_ENUM;

/**
 * @brief EXTI Initialize structure
 */
typedef struct
{
	EXTI_LINE_ENUM EXTI_Line; /*!<Select external interrupt pin (EINT0, EINT1, EINT 2, EINT3) */

	EXTI_MODE_ENUM EXTI_Mode; /*!< Choose between Level-sensitivity or Edge sensitivity */

	EXTI_POLARITY_ENUM EXTI_polarity; /*!< 	If EXTI mode is level-sensitive: this element use to select low or high active level
											if EXTI mode is polarity-sensitive: this element use to select falling or rising edge */

}EXTI_InitTypeDef;


/**
 * @}
 */


/* Public Functions ----------------------------------------------------------- */
/** @defgroup EXTI_Public_Functions EXTI Public Functions
 * @{
 */

void EXTI_Init(void);
void EXTI_DeInit(void);

void EXTI_Config(EXTI_InitTypeDef *EXTICfg);
void EXTI_SetMode(EXTI_LINE_ENUM EXTILine, EXTI_MODE_ENUM mode);
void EXTI_SetPolarity(EXTI_LINE_ENUM EXTILine, EXTI_POLARITY_ENUM polarity);
void EXTI_ClearEXTIFlag(EXTI_LINE_ENUM EXTILine);


/**
 * @}
 */


#ifdef __cplusplus
}
#endif


#endif /* LPC17XX_EXTI_H_ */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */
