nes-proj/platform/mb851/dev/button-sensor.c

197 lines
5.3 KiB
C

/*
* 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/micro/micro-common.h"
#include "hal/micro/cortexm3/micro-common.h"
#include BOARD_HEADER
#define DEBOUNCE 1
/**
* @brief Port and pin for BUTTON0.
*/
#undef BUTTON_S1
#define BUTTON_S1 PORTA_PIN(7)
#define BUTTON_S1_INPUT_GPIO BUTTON_INPUT_GPIO(PORTA)
#define BUTTON_S1_GPIO_PIN 7
#define BUTTON_S1_OUTPUT_GPIO GPIO_PAOUT
/**
* @brief Point the proper IRQ at the desired pin for BUTTON0.
*/
#define BUTTON_S1_SEL() do { GPIO_IRQCSEL = BUTTON_S1; } while(0)
/**
* @brief The interrupt service routine for BUTTON_S1.
*/
#define BUTTON_S1_ISR halIrqCIsr
/**
* @brief The interrupt configuration register for BUTTON_S1.
*/
#define BUTTON_S1_INTCFG GPIO_INTCFGC
/**
* @brief The interrupt bit for BUTTON_S1.
*/
#define BUTTON_S1_INT_EN_BIT INT_IRQC
/**
* @brief The interrupt bit for BUTTON_S1.
*/
#define BUTTON_S1_FLAG_BIT INT_IRQCFLAG
/**
* @brief The missed interrupt bit for BUTTON_S1.
*/
#define BUTTON_S1_MISS_BIT INT_MISSIRQC
#if DEBOUNCE
static struct timer debouncetimer;
#endif
#define FALSE 0
#define TRUE 1
/*---------------------------------------------------------------------------*/
static void
init(void)
{
#if DEBOUNCE
timer_set(&debouncetimer, 0);
#endif
/* Configure GPIO for BUTTONSs */
//Input, pulled up or down (selected by GPIO_PxOUT: 0 = pull-down, 1 = pull-up).
halGpioConfig(BUTTON_S1,GPIOCFG_IN_PUD);
BUTTON_S1_OUTPUT_GPIO |= GPIOOUT_PULLUP << BUTTON_S1_GPIO_PIN;
BUTTON_S1_SEL();
BUTTON_S1_INTCFG = 0x40; // Falling edge triggered.
}
/*---------------------------------------------------------------------------*/
static void
activate(void)
{
INT_CFGSET = BUTTON_S1_INT_EN_BIT;
}
/*---------------------------------------------------------------------------*/
static void
deactivate(void)
{
INT_CFGCLR = BUTTON_S1_INT_EN_BIT;
}
/*---------------------------------------------------------------------------*/
static int
active(void)
{
return (INT_CFGSET & BUTTON_S1_INT_EN_BIT) ? TRUE : FALSE ;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
#if DEBOUNCE
return (BUTTON_S1_INPUT_GPIO & (1<<BUTTON_S1_GPIO_PIN)) || !timer_expired(&debouncetimer);
#else
return BUTTON_S1_INPUT_GPIO & (1<<BUTTON_S1_GPIO_PIN);
#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;
}
/*---------------------------------------------------------------------------*/
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);
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
value, configure, status);