162 lines
6 KiB
C
162 lines
6 KiB
C
/*
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* Copyright (c) 2016, Zolertia - http://www.zolertia.com
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-ac-dimmer
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* @{
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*
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* \file
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* Driver for the Krida Electronics AC light dimmer with zero-crossing, using
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* a 50Hz frequency as reference (1/50Hz) ~20ms and 10ms half-cycle
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "ac-dimmer.h"
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#include "dev/gpio.h"
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#include "lib/sensors.h"
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#include "dev/ioc.h"
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/*---------------------------------------------------------------------------*/
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#define DIMMER_SYNC_PORT_BASE GPIO_PORT_TO_BASE(DIMMER_SYNC_PORT)
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#define DIMMER_SYNC_PIN_MASK GPIO_PIN_MASK(DIMMER_SYNC_PIN)
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#define DIMMER_GATE_PORT_BASE GPIO_PORT_TO_BASE(DIMMER_GATE_PORT)
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#define DIMMER_GATE_PIN_MASK GPIO_PIN_MASK(DIMMER_GATE_PIN)
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/*---------------------------------------------------------------------------*/
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static uint8_t enabled;
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static uint8_t dimming;
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/*---------------------------------------------------------------------------*/
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PROCESS(ac_dimmer_int_process, "AC Dimmer zero-cross interrupt process");
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(ac_dimmer_int_process, ev, data)
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{
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PROCESS_EXITHANDLER();
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PROCESS_BEGIN();
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int dimtime;
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while(1) {
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PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
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dimtime = (uint8_t)(100 - dimming);
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dimtime *= 100;
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/* Off cycle */
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clock_delay_usec(dimtime);
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GPIO_SET_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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/* Triac on propagation delay */
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clock_delay_usec(DIMMER_DEFAULT_GATE_PULSE_US);
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GPIO_CLR_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static void
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dimmer_zero_cross_int_handler(uint8_t port, uint8_t pin)
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{
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if((port == DIMMER_SYNC_PORT) && (pin == DIMMER_SYNC_PIN)) {
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process_poll(&ac_dimmer_int_process);
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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return dimming;
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case SENSORS_READY:
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return enabled;
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}
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return DIMMER_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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if(!enabled) {
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return DIMMER_ERROR;
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}
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dimming = (uint8_t)type;
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return DIMMER_SUCCESS;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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if(type != SENSORS_ACTIVE) {
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return DIMMER_ERROR;
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}
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if(value) {
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/* This is the Triac's gate pin */
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GPIO_SOFTWARE_CONTROL(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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GPIO_SET_OUTPUT(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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ioc_set_over(DIMMER_GATE_PORT, DIMMER_GATE_PIN, IOC_OVERRIDE_OE);
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GPIO_CLR_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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/* This is the zero-crossing pin and interrupt */
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GPIO_SOFTWARE_CONTROL(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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GPIO_SET_INPUT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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/* Pull-up resistor, detect rising edge */
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GPIO_DETECT_EDGE(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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GPIO_TRIGGER_SINGLE_EDGE(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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GPIO_DETECT_RISING(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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gpio_register_callback(dimmer_zero_cross_int_handler, DIMMER_SYNC_PORT,
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DIMMER_SYNC_PIN);
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/* Spin process until an interrupt is received */
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process_start(&ac_dimmer_int_process, NULL);
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/* Enable interrupts */
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GPIO_ENABLE_INTERRUPT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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// ioc_set_over(DIMMER_SYNC_PORT, DIMMER_SYNC_PIN, IOC_OVERRIDE_PUE);
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nvic_interrupt_enable(DIMMER_INT_VECTOR);
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enabled = 1;
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dimming = DIMMER_DEFAULT_START_VALUE;
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return DIMMER_SUCCESS;
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}
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/* Disable interrupt and pins */
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GPIO_DISABLE_INTERRUPT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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GPIO_SET_INPUT(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
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GPIO_SET_OUTPUT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
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process_exit(&ac_dimmer_int_process);
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enabled = 0;
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dimming = 0;
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return DIMMER_SUCCESS;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(ac_dimmer, AC_DIMMER_ACTUATOR, value, configure, status);
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/*---------------------------------------------------------------------------*/
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/** @} */
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