/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MBED_GPIO_IRQ_API_H
#define MBED_GPIO_IRQ_API_H

#include "device.h"

#if DEVICE_INTERRUPTIN

#ifdef __cplusplus
extern "C" {
#endif

/** GPIO IRQ events
 */
typedef enum {
    IRQ_NONE,
    IRQ_RISE,
    IRQ_FALL
} gpio_irq_event;

/** GPIO IRQ HAL structure. gpio_irq_s is declared in the target's HAL
 */
typedef struct gpio_irq_s gpio_irq_t;

typedef void (*gpio_irq_handler)(uint32_t id, gpio_irq_event event);

/**
 * \defgroup hal_gpioirq GPIO IRQ HAL functions
 * @{
 */

/** Initialize the GPIO IRQ pin
 *
 * @param obj     The GPIO object to initialize
 * @param pin     The GPIO pin name
 * @param handler The handler to be attached to GPIO IRQ
 * @param id      The object ID (id != 0, 0 is reserved)
 * @return -1 if pin is NC, 0 otherwise
 */
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id);

/** Release the GPIO IRQ PIN
 *
 * @param obj The gpio object
 */
void gpio_irq_free(gpio_irq_t *obj);

/** Enable/disable pin IRQ event
 *
 * @param obj    The GPIO object
 * @param event  The GPIO IRQ event
 * @param enable The enable flag
 */
void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable);

/** Enable GPIO IRQ
 *
 * This is target dependent, as it might enable the entire port or just a pin
 * @param obj The GPIO object
 */
void gpio_irq_enable(gpio_irq_t *obj);

/** Disable GPIO IRQ
 *
 * This is target dependent, as it might disable the entire port or just a pin
 * @param obj The GPIO object
 */
void gpio_irq_disable(gpio_irq_t *obj);

/**@}*/

#ifdef __cplusplus
}
#endif

#endif

#endif
