nes-proj/examples/platform-specific/zoul/test-ac-dimmer.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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \addtogroup zoul-examples
* @{
*
* \defgroup zoul-ac-dimmer-test Krida Electronics AC light dimmer test example
*
* Demonstrates the use of an AC dimmer with zero-crossing, connected to the
* ADC1 and ADC2 pins (PA5 and PA4 respectively), powered over the D+5.1 pin
*
* @{
*
* \file
* A quick program to test an AC dimmer
* \author
* Antonio Lignan <alinan@zolertia.com>
*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
#include "contiki.h"
#include "dev/ac-dimmer.h"
#include "lib/sensors.h"
/*---------------------------------------------------------------------------*/
PROCESS(remote_ac_dimmer_process, "AC light dimmer test");
AUTOSTART_PROCESSES(&remote_ac_dimmer_process);
/*---------------------------------------------------------------------------*/
static uint8_t dimming;
static struct etimer et;
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(remote_ac_dimmer_process, ev, data)
{
PROCESS_BEGIN();
dimming = 0;
SENSORS_ACTIVATE(ac_dimmer);
printf("AC dimmer: min %u%% max %u%%\n", DIMMER_DEFAULT_MIN_DIMM_VALUE,
DIMMER_DEFAULT_MAX_DIMM_VALUE);
/* Set the lamp to 10% and wait a few seconds */
ac_dimmer.value(DIMMER_DEFAULT_MIN_DIMM_VALUE);
etimer_set(&et, CLOCK_SECOND * 5);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
/* Upon testing for duty cycles lower than 10% there was noise (probably from
* the triac), causing the driver to skip a beat, and from time to time made
* the test lamp blink. This is easily reproducible by setting the dimmer to
* 5% and using a logic analyzer on the SYNC and GATE pins. The noise was
* picked-up also by the non-connected test probes of the logic analyser.
* Nevertheless the difference between 10% and 2% bright-wise is almost
* negligible
*/
while(1) {
dimming += DIMMER_DEFAULT_MIN_DIMM_VALUE;
if(dimming > DIMMER_DEFAULT_MAX_DIMM_VALUE) {
dimming = DIMMER_DEFAULT_MIN_DIMM_VALUE;
}
ac_dimmer.value(dimming);
printf("AC dimmer: light is now --> %u\n", ac_dimmer.status(SENSORS_ACTIVE));
etimer_set(&et, CLOCK_SECOND);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/