stm32l4_wiring_interrupts.c

/*
 * Copyright (c) 2016 Thomas Roell.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal with 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:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimers.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimers in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of Thomas Roell, nor the names of its contributors
 *     may be used to endorse or promote products derived from this Software
 *     without specific prior written permission.
 *
 * 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
 * CONTRIBUTORS 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
 * WITH THE SOFTWARE.
 */

#include "Arduino.h"
#include "stm32l4_wiring_private.h"

#include <string.h>

void attachInterrupt(uint32_t pin, voidFuncPtr callback, uint32_t mode)
{
    if (!(g_APinDescription[pin].attr & PIN_ATTR_EXTI))
	return;

    switch (mode) {
    
    case CHANGE:
	stm32l4_exti_notify(&stm32l4_exti, g_APinDescription[pin].pin, EXTI_CONTROL_BOTH_EDGES, (stm32l4_exti_callback_t)callback, NULL);
	break;
    
    case FALLING:
	stm32l4_exti_notify(&stm32l4_exti, g_APinDescription[pin].pin, EXTI_CONTROL_FALLING_EDGE, (stm32l4_exti_callback_t)callback, NULL);
	break;
    
    case RISING:
	stm32l4_exti_notify(&stm32l4_exti, g_APinDescription[pin].pin, EXTI_CONTROL_RISING_EDGE, (stm32l4_exti_callback_t)callback, NULL);
	break;
    }
}

void detachInterrupt(uint32_t pin)
{
    if (!(g_APinDescription[pin].attr & PIN_ATTR_EXTI))
	return;

    stm32l4_exti_notify(&stm32l4_exti, g_APinDescription[pin].pin, EXTI_CONTROL_DISABLE, NULL, NULL);
}