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/***************************************************************************
* Copyright (C) 02/2021 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License, *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <avr/interrupt.h>
#include <avr/io.h>
#include "event.h"
/* *********************************************************************** */
static event_entry_t m_events[EVENT_COUNT];
static volatile uint8_t m_event_in_idx;
static volatile uint8_t m_event_out_idx;
/* *********************************************************************** */
void event_queue(uint8_t type, uint8_t num, uint16_t value)
{
event_entry_t * p_event;
uint8_t sreg_save;
uint8_t idx;
sreg_save = SREG;
cli();
idx = m_event_in_idx;
p_event = &m_events[idx];
if (p_event->type == EVENT_TYPE_EMPTY)
{
p_event->type = type;
p_event->num = num;
p_event->value = value;
m_event_in_idx = (idx +1) % EVENT_COUNT;
}
SREG = sreg_save;
} /* event_queue */
event_entry_t * event_get(void)
{
return &m_events[m_event_out_idx];
} /* event_get */
void event_clear(event_entry_t * p_event)
{
uint8_t idx = m_event_out_idx;
if ((p_event == &m_events[idx]) &&
(p_event->type != EVENT_TYPE_EMPTY)
)
{
p_event->type = EVENT_TYPE_EMPTY;
m_event_out_idx = (idx +1) % EVENT_COUNT;
}
} /* event_clear */