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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file libmaple/include/libmaple/exti.h
* @brief External interrupt control
*/
/* See notes/exti.txt for more info */
#ifndef _LIBMAPLE_EXTI_H_
#define _LIBMAPLE_EXTI_H_
#ifdef __cplusplus
extern "C"{
#endif
#include <series/exti.h> /* provides EXTI_BASE */
#include <libmaple/libmaple_types.h>
/*
* Register map and base pointer.
*/
/** EXTI register map type */
typedef struct exti_reg_map {
__io uint32 IMR; /**< Interrupt mask register */
__io uint32 EMR; /**< Event mask register */
__io uint32 RTSR; /**< Rising trigger selection register */
__io uint32 FTSR; /**< Falling trigger selection register */
__io uint32 SWIER; /**< Software interrupt event register */
__io uint32 PR; /**< Pending register */
} exti_reg_map;
/*
* Types: exti_num, exti_cfg, exti_trigger_mode.
*
* A combination of these three specifies an external interrupt
* configuration (see exti_attach_interrupt()).
*/
/** EXTI line. */
typedef enum exti_num {
EXTI0, /**< EXTI line 0 */
EXTI1, /**< EXTI line 1 */
EXTI2, /**< EXTI line 2 */
EXTI3, /**< EXTI line 3 */
EXTI4, /**< EXTI line 4 */
EXTI5, /**< EXTI line 5 */
EXTI6, /**< EXTI line 6 */
EXTI7, /**< EXTI line 7 */
EXTI8, /**< EXTI line 8 */
EXTI9, /**< EXTI line 9 */
EXTI10, /**< EXTI line 10 */
EXTI11, /**< EXTI line 11 */
EXTI12, /**< EXTI line 12 */
EXTI13, /**< EXTI line 13 */
EXTI14, /**< EXTI line 14 */
EXTI15, /**< EXTI line 15 */
} exti_num;
/**
* @brief EXTI port configuration
*
* These specify which GPIO port an external interrupt line should be
* connected to.
*/
typedef enum exti_cfg {
EXTI_PA, /**< Use PAx pin */
EXTI_PB, /**< Use PBx pin */
EXTI_PC, /**< Use PCx pin */
EXTI_PD, /**< Use PDx pin */
EXTI_PE, /**< Use PEx pin */
EXTI_PF, /**< Use PFx pin */
EXTI_PG, /**< Use PGx pin */
EXTI_PH, /**< Use PHx pin */
EXTI_PI, /**< Use PIx pin */
} exti_cfg;
/** External interrupt trigger mode */
typedef enum exti_trigger_mode {
EXTI_RISING, /**< Trigger on the rising edge */
EXTI_FALLING, /**< Trigger on the falling edge */
EXTI_RISING_FALLING /**< Trigger on both the rising and falling edges */
} exti_trigger_mode;
/*
* Routines
*/
void exti_attach_interrupt(exti_num num,
exti_cfg port,
voidFuncPtr handler,
exti_trigger_mode mode);
void exti_attach_callback(exti_num num,
exti_cfg port,
voidArgumentFuncPtr handler,
void *arg,
exti_trigger_mode mode);
void exti_detach_interrupt(exti_num num);
/**
* @brief Set the GPIO port for an EXTI line.
*
* This is a low-level routine that most users will not
* need. exti_attach_interrupt() handles calling this function
* appropriately.
*
* @param num EXTI line
* @param port EXTI configuration for GPIO port to connect to num.
* @see exti_num
* @see exti_cfg
*/
extern void exti_select(exti_num num, exti_cfg port);
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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