73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2006, Swedish Institute of Computer Science
|
|
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
|
|
*
|
|
*/
|
|
|
|
#include "contiki.h"
|
|
#include "dev/button.h"
|
|
#include "isr_compat.h"
|
|
|
|
#define BUTTON_PORT 2
|
|
#define BUTTON_PIN 7
|
|
|
|
static struct button_msg button_msg;
|
|
|
|
static struct process *selecting_proc;
|
|
|
|
void
|
|
button_init(struct process *proc)
|
|
{
|
|
button_msg.type = BUTTON_MSG_TYPE;
|
|
|
|
P2DIR &= ~BV(BUTTON_PIN);
|
|
P2SEL &= ~BV(BUTTON_PIN);
|
|
|
|
P2IES |= BV(BUTTON_PIN);
|
|
P2IFG &= ~BV(BUTTON_PIN);
|
|
|
|
selecting_proc = proc;
|
|
if(proc != NULL)
|
|
P2IE |= BV(BUTTON_PIN);
|
|
else
|
|
P2IE &= ~BV(BUTTON_PIN);
|
|
}
|
|
|
|
ISR(PORT2, __button_interrupt)
|
|
{
|
|
static struct timer debouncetimer;
|
|
|
|
P2IFG &= ~BV(BUTTON_PIN);
|
|
if(timer_expired(&debouncetimer)) {
|
|
button_msg.value = P2IN & BV(BUTTON_PIN);
|
|
timer_set(&debouncetimer, CLOCK_SECOND/4);
|
|
if(selecting_proc != NULL) {
|
|
process_post(selecting_proc, PROCESS_EVENT_MSG, &button_msg);
|
|
}
|
|
LPM4_EXIT;
|
|
}
|
|
}
|