osd-contiki/cpu/avr/dev/t4-servo-sensor.c

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/*
** Copyright (C) 2013-2014 Marcus Priesch, All rights reserved
** In Prandnern 31, A--2122 Riedenthal, Austria. office@priesch.co.at
**
** 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.
**
**++
** Name
** t4-servo-sensor
**
** Purpose
** Implements a sensor around t4servo.c
**
**
** Revision Dates
** 31-Mar-2013 (MPR) Creation
** 12-Mar-2014 (MPR) Factored to support configurable amount of pwm's
** <EFBFBD><EFBFBD>revision-date<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
**--
*/
#include "contiki.h"
#include "dev/t4-servo.h"
#include "dev/t4-servo-sensor.h"
const struct sensors_sensor t4_servo_sensor;
static int status(int type);
static int enabled = 0;
static int value (int channel)
{
if (channel >= SERVO_COUNT)
return -1;
else if (channel < 0)
return -2;
else
return t4_servo_get (channel);
}
static int configure (int type, int c) // type, c: SENSORS_ACTIVE, 1 -> act.
// type, c: SENSORS_ACTIVE, 0 -> deact.
{
switch (type)
{
case SENSORS_ACTIVE :
if (c == 0)
{
t4_servo_off ();
}
else if (c == 1)
{
t4_servo_init ();
}
break;
default :
if (type >= SERVO_COUNT)
return -1;
else
t4_servo_set (type, c);
break;
}
return 0;
}
static int status(int type)
{
switch (type)
{
case SENSORS_ACTIVE:
case SENSORS_READY:
return enabled;
}
return 0;
}
SENSORS_SENSOR(t4_servo_sensor, T4_SENSOR_NAME, value, configure, status);