contiki/platform/zoul/dev/relay.c

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/*
* Copyright (c) 2016, Zolertia - http://www.zolertia.com
* 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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-relay
* @{
*
* \file
* Driver for a relay actuator
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "relay.h"
#include "dev/gpio.h"
#include "lib/sensors.h"
#include "dev/ioc.h"
/*---------------------------------------------------------------------------*/
#define RELAY_PORT_BASE GPIO_PORT_TO_BASE(RELAY_PORT)
#define RELAY_PIN_MASK GPIO_PIN_MASK(RELAY_PIN)
/*---------------------------------------------------------------------------*/
static uint8_t enabled;
/*---------------------------------------------------------------------------*/
static int
relay_on(void)
{
if(enabled) {
GPIO_SET_PIN(RELAY_PORT_BASE, RELAY_PIN_MASK);
return RELAY_SUCCESS;
}
return RELAY_ERROR;
}
/*---------------------------------------------------------------------------*/
static int
relay_off(void)
{
if(enabled) {
GPIO_CLR_PIN(RELAY_PORT_BASE, RELAY_PIN_MASK);
return RELAY_SUCCESS;
}
return RELAY_ERROR;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch(type) {
case SENSORS_ACTIVE:
return GPIO_READ_PIN(RELAY_PORT_BASE, RELAY_PIN_MASK);
case SENSORS_READY:
return enabled;
}
return RELAY_ERROR;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
switch(type) {
case RELAY_OFF:
return relay_on();
case RELAY_ON:
return relay_off();
case RELAY_TOGGLE:
if(status(SENSORS_ACTIVE)) {
return relay_off();
} else {
return relay_on();
}
default:
return RELAY_ERROR;
}
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
if(type != SENSORS_ACTIVE) {
return RELAY_ERROR;
}
if(value) {
GPIO_SOFTWARE_CONTROL(RELAY_PORT_BASE, RELAY_PIN_MASK);
GPIO_SET_OUTPUT(RELAY_PORT_BASE, RELAY_PIN_MASK);
ioc_set_over(RELAY_PORT, RELAY_PIN, IOC_OVERRIDE_OE);
GPIO_CLR_PIN(RELAY_PORT_BASE, RELAY_PIN_MASK);
enabled = 1;
return RELAY_SUCCESS;
}
GPIO_SET_INPUT(RELAY_PORT_BASE, RELAY_PIN_MASK);
enabled = 0;
return RELAY_SUCCESS;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(relay, RELAY_ACTUATOR, value, configure, status);
/*---------------------------------------------------------------------------*/
/** @} */