contiki/platform/z1/dev/relay-phidget.c

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/*
* Copyright (c) 2010, 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.
*
* This file is part of the Contiki operating system.
*
*
* -----------------------------------------------------------------
*
* \file
* Device simple driver for generic relay in phidget port of Zolertia Z1
* \author
* Antonio Lignan, Zolertia <alinan@zolertia.com>
*
*/
#include "contiki.h"
#include "relay-phidget.h"
static uint8_t controlPin;
enum PHIDGET_RELAY_STATUSTYPES {
/* must be a bit and not more, not using 0x00. */
INITED = 0x01,
RUNNING = 0x02,
STOPPED = 0x04,
};
static enum PHIDGET_RELAY_STATUSTYPES _RELAY_STATUS = 0x00;
/*---------------------------------------------------------------------------*/
void
relay_enable(uint8_t pin)
{
if(!(_RELAY_STATUS & INITED)) {
_RELAY_STATUS |= INITED;
/* Selects the pin to be configure as the control pin of the relay module */
controlPin = (1 << pin);
/* Configures the control pin */
P6SEL &= ~controlPin;
P6DIR |= controlPin;
}
}
/*---------------------------------------------------------------------------*/
void
relay_on()
{
if((_RELAY_STATUS & INITED)) {
P6OUT |= controlPin;
}
}
/*---------------------------------------------------------------------------*/
void
relay_off()
{
if((_RELAY_STATUS & INITED)) {
P6OUT &= ~controlPin;
}
}
/*---------------------------------------------------------------------------*/
int8_t
relay_toggle()
{
if((_RELAY_STATUS & INITED)) {
P6OUT ^= controlPin;
if((P6OUT & controlPin)) {
return 1;
}
return 0;
}
return -1;
}
/*---------------------------------------------------------------------------*/