185 lines
5.1 KiB
C
185 lines
5.1 KiB
C
/*
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* Copyright (c) 2010, STMicroelectronics.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki OS
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*
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* $Id: button-sensor.c,v 1.1 2010/10/25 09:03:39 salvopitru Exp $
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \file
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* Button sensor.
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* \author
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* Salvatore Pitrulli <salvopitru@users.sourceforge.net>
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*/
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/*---------------------------------------------------------------------------*/
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#include "dev/button-sensor.h"
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#include "hal/micro/micro-common.h"
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#include "hal/micro/cortexm3/micro-common.h"
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#include BOARD_HEADER
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#define DEBOUNCE 1
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/**
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* @brief Point the proper IRQ at the desired pin for BUTTON0.
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*/
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#define BUTTON_S1_SEL() do { GPIO_IRQCSEL = BUTTON_S1; } while(0)
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/**
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* @brief The interrupt service routine for BUTTON_S1.
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*/
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#define BUTTON_S1_ISR halIrqCIsr
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/**
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* @brief The interrupt configuration register for BUTTON_S1.
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*/
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#define BUTTON_S1_INTCFG GPIO_INTCFGC
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/**
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* @brief The interrupt bit for BUTTON_S1.
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*/
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#define BUTTON_S1_INT_EN_BIT INT_IRQC
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/**
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* @brief The interrupt bit for BUTTON_S1.
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*/
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#define BUTTON_S1_FLAG_BIT INT_IRQCFLAG
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/**
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* @brief The missed interrupt bit for BUTTON_S1.
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*/
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#define BUTTON_S1_MISS_BIT INT_MISSIRQC
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#if DEBOUNCE
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static struct timer debouncetimer;
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#endif
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#define FALSE 0
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#define TRUE 1
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/*---------------------------------------------------------------------------*/
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static void
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init(void)
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{
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#if DEBOUNCE
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timer_set(&debouncetimer, 0);
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#endif
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//Input, pulled up or down (selected by GPIO_PxOUT: 0 = pull-down, 1 = pull-up).
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halGpioConfig(BUTTON_S1,GPIOCFG_IN_PUD);
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BUTTON_S1_OUTPUT_GPIO |= GPIOOUT_PULLUP << BUTTON_S1_GPIO_PIN;
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BUTTON_S1_SEL();
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BUTTON_S1_INTCFG = 0x40; // Falling edge triggered.
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}
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/*---------------------------------------------------------------------------*/
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static void
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activate(void)
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{
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INT_CFGSET = BUTTON_S1_INT_EN_BIT;
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}
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/*---------------------------------------------------------------------------*/
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static void
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deactivate(void)
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{
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INT_CFGCLR = BUTTON_S1_INT_EN_BIT;
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}
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/*---------------------------------------------------------------------------*/
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static int
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active(void)
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{
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return (INT_CFGSET & BUTTON_S1_INT_EN_BIT) ? TRUE : FALSE ;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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#if DEBOUNCE
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return (BUTTON_S1_INPUT_GPIO & (1<<BUTTON_S1_GPIO_PIN)) || !timer_expired(&debouncetimer);
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#else
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return BUTTON_S1_INPUT_GPIO & (1<<BUTTON_S1_GPIO_PIN);
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#endif
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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switch(type){
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case SENSORS_HW_INIT:
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init();
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return 1;
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case SENSORS_ACTIVE:
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if(value)
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activate();
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else
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deactivate();
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_READY:
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return active();
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void BUTTON_S1_ISR(void)
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{
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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//sensors_handle_irq(IRQ_BUTTON);
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if(INT_GPIOFLAG & BUTTON_S1_FLAG_BIT) {
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#if DEBOUNCE
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if(timer_expired(&debouncetimer)) {
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timer_set(&debouncetimer, CLOCK_SECOND / 5);
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sensors_changed(&button_sensor);
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}
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#else
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sensors_changed(&button_sensor);
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#endif
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}
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INT_GPIOFLAG = BUTTON_S1_FLAG_BIT;
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
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value, configure, status);
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