nes-proj/os/dev/gpio-hal.c

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/*
* Copyright (c) 2017, George Oikonomou - http://www.spd.gr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup gpio-hal
* @{
*
* \file
* Implementation of the platform-independent aspects of the GPIO HAL
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "dev/gpio-hal.h"
#include "lib/list.h"
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#include "sys/log.h"
#include <stdint.h>
#include <string.h>
/*---------------------------------------------------------------------------*/
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/* Log configuration */
#define LOG_MODULE "GPIO HAL"
#define LOG_LEVEL LOG_LEVEL_NONE
/*---------------------------------------------------------------------------*/
LIST(handlers);
/*---------------------------------------------------------------------------*/
void
gpio_hal_register_handler(gpio_hal_event_handler_t *handler)
{
list_add(handlers, handler);
}
/*---------------------------------------------------------------------------*/
void
gpio_hal_event_handler(gpio_hal_pin_mask_t pins)
{
gpio_hal_event_handler_t *this;
for(this = list_head(handlers); this != NULL; this = this->next) {
if(pins & this->pin_mask) {
if(this->handler != NULL) {
this->handler(pins & this->pin_mask);
}
}
}
}
/*---------------------------------------------------------------------------*/
void
gpio_hal_init()
{
list_init(handlers);
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gpio_hal_arch_init();
}
/*---------------------------------------------------------------------------*/
#if GPIO_HAL_ARCH_SW_TOGGLE
/*---------------------------------------------------------------------------*/
void
gpio_hal_arch_toggle_pin(gpio_hal_pin_t pin)
{
if(pin >= GPIO_HAL_PIN_COUNT) {
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LOG_ERR("Pin %u out of bounds\n", pin);
return;
}
gpio_hal_arch_write_pin(pin, gpio_hal_arch_read_pin(pin) ^ 1);
}
/*---------------------------------------------------------------------------*/
void
gpio_hal_arch_toggle_pins(gpio_hal_pin_mask_t pins)
{
gpio_hal_arch_write_pins(pins, ~gpio_hal_arch_read_pins(pins));
}
/*---------------------------------------------------------------------------*/
#endif /* GPIO_HAL_ARCH_SW_TOGGLE */
/*---------------------------------------------------------------------------*/
/**
* @}
*/