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