osd-contiki/platform/mbxxx/dev/button-sensor.c

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/*
* Copyright (c) 2010, STMicroelectronics.
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This file is part of the Contiki OS
*
*/
/*---------------------------------------------------------------------------*/
/**
* \file
* Button sensor.
* \author
* Salvatore Pitrulli <salvopitru@users.sourceforge.net>
*/
/*---------------------------------------------------------------------------*/
#include "dev/button-sensor.h"
#include "hal.h"
#include "hal/micro/micro-common.h"
#include "hal/micro/cortexm3/micro-common.h"
#include BOARD_HEADER
#define DEBOUNCE 1
#if DEBOUNCE
static struct timer debouncetimer;
#endif
#define FALSE 0
#define TRUE 1
uint8_t button_flags = 0;
#define BUTTON_ACTIVE_FLG 0x01
#define BUTTON_PRESSED_FLG 0x02
#define BUTTON_HAS_BEEN_PRESSED() (button_flags & BUTTON_PRESSED_FLG)
#define BUTTON_HAS_BEEN_RELEASED() (!(button_flags & BUTTON_PRESSED_FLG))
#define BUTTON_SET_PRESSED() (button_flags |= BUTTON_PRESSED_FLG)
#define BUTTON_SET_RELEASED() (button_flags &= ~BUTTON_PRESSED_FLG)
/*---------------------------------------------------------------------------*/
static void
init(void)
{
#if DEBOUNCE
timer_set(&debouncetimer, 0);
#endif
/* Configure GPIO for BUTTONSs */
halInitButton();
}
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
button_flags |= BUTTON_ACTIVE_FLG;
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
button_flags &= ~BUTTON_ACTIVE_FLG;
}
/*---------------------------------------------------------------------------*/
static int
active(void)
{
return (button_flags & BUTTON_ACTIVE_FLG)? 1 : 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
if(!active()){
return 0;
}
#if DEBOUNCE
if(timer_expired(&debouncetimer)) {
if(halGetButtonStatus(BUTTON_S1) == BUTTON_PRESSED){
timer_set(&debouncetimer, CLOCK_SECOND / 10);
if(BUTTON_HAS_BEEN_RELEASED()){ // Button has been previously released.
sensors_changed(&button_sensor);
}
BUTTON_SET_PRESSED();
return 1;
}
else {
BUTTON_SET_RELEASED();
return 0;
}
}
else {
return 0;
}
#else
if(halGetButtonStatus(BUTTON_S1) == BUTTON_PRESSED){
sensors_changed(&button_sensor);
return 1;
}
else {
return 0;
}
#endif
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
switch(type){
case SENSORS_HW_INIT:
init();
return 1;
case SENSORS_ACTIVE:
if(value)
activate();
else
deactivate();
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch(type) {
case SENSORS_READY:
return active();
}
return 0;
}
/*---------------------------------------------------------------------------*/
#if 0
void BUTTON_S1_ISR(void)
{
ENERGEST_ON(ENERGEST_TYPE_IRQ);
//sensors_handle_irq(IRQ_BUTTON);
if(INT_GPIOFLAG & BUTTON_S1_FLAG_BIT) {
#if DEBOUNCE
if(timer_expired(&debouncetimer)) {
timer_set(&debouncetimer, CLOCK_SECOND / 5);
sensors_changed(&button_sensor);
}
#else
sensors_changed(&button_sensor);
#endif
}
INT_GPIOFLAG = BUTTON_S1_FLAG_BIT;
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
#endif
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
value, configure, status);