nes-proj/arch/platform/zoul/dev/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.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup zoul-ac-dimmer
* @{
*
* \file
* Driver for the Krida Electronics AC light dimmer with zero-crossing, using
* a 50Hz frequency as reference (1/50Hz) ~20ms and 10ms half-cycle
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "ac-dimmer.h"
#include "dev/gpio.h"
#include "lib/sensors.h"
#include "dev/ioc.h"
/*---------------------------------------------------------------------------*/
#define DIMMER_SYNC_PORT_BASE GPIO_PORT_TO_BASE(DIMMER_SYNC_PORT)
#define DIMMER_SYNC_PIN_MASK GPIO_PIN_MASK(DIMMER_SYNC_PIN)
#define DIMMER_GATE_PORT_BASE GPIO_PORT_TO_BASE(DIMMER_GATE_PORT)
#define DIMMER_GATE_PIN_MASK GPIO_PIN_MASK(DIMMER_GATE_PIN)
/*---------------------------------------------------------------------------*/
static uint8_t enabled;
static uint8_t dimming;
/*---------------------------------------------------------------------------*/
PROCESS(ac_dimmer_int_process, "AC Dimmer zero-cross interrupt process");
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ac_dimmer_int_process, ev, data)
{
PROCESS_EXITHANDLER();
PROCESS_BEGIN();
int dimtime;
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
dimtime = (uint8_t)(100 - dimming);
dimtime *= 100;
/* Off cycle */
clock_delay_usec(dimtime);
GPIO_SET_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
/* Triac on propagation delay */
clock_delay_usec(DIMMER_DEFAULT_GATE_PULSE_US);
GPIO_CLR_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
dimmer_zero_cross_int_handler(uint8_t port, uint8_t pin)
{
if((port == DIMMER_SYNC_PORT) && (pin == DIMMER_SYNC_PIN)) {
process_poll(&ac_dimmer_int_process);
}
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
switch(type) {
case SENSORS_ACTIVE:
return dimming;
case SENSORS_READY:
return enabled;
}
return DIMMER_ERROR;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
if(!enabled) {
return DIMMER_ERROR;
}
dimming = (uint8_t)type;
return DIMMER_SUCCESS;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
if(type != SENSORS_ACTIVE) {
return DIMMER_ERROR;
}
if(value) {
/* This is the Triac's gate pin */
GPIO_SOFTWARE_CONTROL(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
GPIO_SET_OUTPUT(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
ioc_set_over(DIMMER_GATE_PORT, DIMMER_GATE_PIN, IOC_OVERRIDE_OE);
GPIO_CLR_PIN(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
/* This is the zero-crossing pin and interrupt */
GPIO_SOFTWARE_CONTROL(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
GPIO_SET_INPUT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
/* Pull-up resistor, detect rising edge */
GPIO_DETECT_EDGE(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
GPIO_TRIGGER_SINGLE_EDGE(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
GPIO_DETECT_RISING(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
gpio_register_callback(dimmer_zero_cross_int_handler, DIMMER_SYNC_PORT,
DIMMER_SYNC_PIN);
/* Spin process until an interrupt is received */
process_start(&ac_dimmer_int_process, NULL);
/* Enable interrupts */
GPIO_ENABLE_INTERRUPT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
// ioc_set_over(DIMMER_SYNC_PORT, DIMMER_SYNC_PIN, IOC_OVERRIDE_PUE);
NVIC_EnableIRQ(DIMMER_INT_VECTOR);
enabled = 1;
dimming = DIMMER_DEFAULT_START_VALUE;
return DIMMER_SUCCESS;
}
/* Disable interrupt and pins */
GPIO_DISABLE_INTERRUPT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
GPIO_SET_INPUT(DIMMER_GATE_PORT_BASE, DIMMER_GATE_PIN_MASK);
GPIO_SET_OUTPUT(DIMMER_SYNC_PORT_BASE, DIMMER_SYNC_PIN_MASK);
process_exit(&ac_dimmer_int_process);
enabled = 0;
dimming = 0;
return DIMMER_SUCCESS;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(ac_dimmer, AC_DIMMER_ACTUATOR, value, configure, status);
/*---------------------------------------------------------------------------*/
/** @} */