Added driver for the Sparkfun's weather meter station
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Antonio Lignan
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f6fb5544c7
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103911f619
4 changed files with 535 additions and 1 deletions
262
platform/zoul/dev/weather-meter.c
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262
platform/zoul/dev/weather-meter.c
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/*
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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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* This file is part of the Contiki operating system.
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-weather-meter-sensor
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* @{
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*
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* The Sparkfun's weather meter comprises an anemometer, wind vane and rain
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* gauge, see https://www.sparkfun.com/products/8942
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*
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* \file
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* Weather meter sensor driver
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* \author
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* Antonio Lignan <alinan@zolertia.com>
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/adc-sensors.h"
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#include "dev/weather-meter.h"
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#include "lib/sensors.h"
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#include "dev/sys-ctrl.h"
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#include "dev/gpio.h"
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#include "dev/ioc.h"
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#include "sys/timer.h"
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#include "sys/etimer.h"
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/*---------------------------------------------------------------------------*/
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#define DEBUG 1
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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#define DEBOUNCE_DURATION (CLOCK_SECOND >> 6)
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/*---------------------------------------------------------------------------*/
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#define ANEMOMETER_SENSOR_PORT_BASE GPIO_PORT_TO_BASE(ANEMOMETER_SENSOR_PORT)
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#define ANEMOMETER_SENSOR_PIN_MASK GPIO_PIN_MASK(ANEMOMETER_SENSOR_PIN)
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#define RAIN_GAUGE_SENSOR_PORT_BASE GPIO_PORT_TO_BASE(RAIN_GAUGE_SENSOR_PORT)
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#define RAIN_GAUGE_SENSOR_PIN_MASK GPIO_PIN_MASK(RAIN_GAUGE_SENSOR_PIN)
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/*---------------------------------------------------------------------------*/
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void (*rain_gauge_int_callback)(uint8_t value);
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void (*anemometer_int_callback)(uint8_t value);
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/*---------------------------------------------------------------------------*/
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process_event_t anemometer_int_event;
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process_event_t rain_gauge_int_event;
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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static struct timer debouncetimer;
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/*---------------------------------------------------------------------------*/
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typedef struct {
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uint16_t ticks;
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uint16_t value;
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} a_ticking_sensor_t;
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typedef struct {
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uint16_t wind_vane;
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a_ticking_sensor_t rain_gauge;
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a_ticking_sensor_t anemometer;
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} weather_meter_sensors;
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static weather_meter_sensors weather_sensors;
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/*---------------------------------------------------------------------------*/
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PROCESS(weather_meter_int_process, "Weather meter interrupt process handler");
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(weather_meter_int_process, ev, data)
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{
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PROCESS_EXITHANDLER();
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PROCESS_BEGIN();
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static uint32_t mph;
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static uint16_t rpm;
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etimer_set(&et, CLOCK_SECOND);
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while(1) {
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PROCESS_YIELD();
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/* The anemometer ticks twice per rotation, and a wind speed of 2.4 km/h
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* makes the switch close every second, convert RPM to linear velocity
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*/
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if(ev == PROCESS_EVENT_TIMER) {
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/* Disable to make the calculations in an interrupt-safe context */
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GPIO_DISABLE_INTERRUPT(ANEMOMETER_SENSOR_PORT_BASE,
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ANEMOMETER_SENSOR_PIN_MASK);
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/* Two ticks per rotation */
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rpm = weather_sensors.anemometer.ticks * 30;
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mph = rpm * WEATHER_METER_AUX_ANGULAR;
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mph /= 1000;
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/* This will return values in metres per hour */
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weather_sensors.anemometer.value = (uint16_t)mph;
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/* Restart the counter */
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weather_sensors.anemometer.ticks = 0;
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/* Enable the interrupt again */
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GPIO_ENABLE_INTERRUPT(ANEMOMETER_SENSOR_PORT_BASE,
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ANEMOMETER_SENSOR_PIN_MASK);
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etimer_restart(&et);
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}
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// anemometer_int_callback(0);
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// rain_gauge_int_callback(0);
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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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weather_meter_interrupt_handler(uint8_t port, uint8_t pin)
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{
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uint32_t aux;
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/* Prevent bounce events */
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if(!timer_expired(&debouncetimer)) {
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return;
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}
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timer_set(&debouncetimer, DEBOUNCE_DURATION);
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/* We make a process_post() to check in the pollhandler any specific threshold
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* value
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*/
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if((port == ANEMOMETER_SENSOR_PORT) && (pin == ANEMOMETER_SENSOR_PIN)) {
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weather_sensors.anemometer.ticks++;
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process_post(&weather_meter_int_process, anemometer_int_event, NULL);
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} else if((port == RAIN_GAUGE_SENSOR_PORT) && (pin == RAIN_GAUGE_SENSOR_PIN)) {
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weather_sensors.rain_gauge.ticks++;
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aux = weather_sensors.rain_gauge.ticks * WEATHER_METER_AUX_RAIN_MM;
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aux /= 1000;
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weather_sensors.rain_gauge.value = (uint16_t)aux;
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process_post(&weather_meter_int_process, rain_gauge_int_event, NULL);
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}
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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((type != WEATHER_METER_ANEMOMETER) && (type != WEATHER_METER_RAIN_GAUGE) &&
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(type != WEATHER_METER_WIND_VANE)) {
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PRINTF("Weather: requested an invalid sensor value\n");
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return WEATHER_METER_ERROR;
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}
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switch(type) {
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case WEATHER_METER_WIND_VANE:
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/* FIXME: return the values in degrees */
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weather_sensors.wind_vane = adc_sensors.value(WIND_VANE_ADC);
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return weather_sensors.wind_vane;
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case WEATHER_METER_ANEMOMETER:
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return weather_sensors.anemometer.value;
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/* as the default return type is int, we have a lower resolution if returning
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* the calculated value as it is truncated, an alternative is returning the
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* ticks and calculating on your own with WEATHER_METER_AUX_RAIN_MM
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*/
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case WEATHER_METER_RAIN_GAUGE:
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#if WEATHER_METER_RAIN_RETURN_TICKS
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return weather_sensors.rain_gauge.ticks;
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#else
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return weather_sensors.rain_gauge.value;
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#endif
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default:
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return WEATHER_METER_ERROR;
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}
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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 != WEATHER_METER_ACTIVE) {
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PRINTF("Weather: invalid configuration option\n");
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return WEATHER_METER_ERROR;
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}
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weather_sensors.wind_vane = 0;
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weather_sensors.anemometer.ticks = 0;
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weather_sensors.anemometer.value = 0;
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weather_sensors.rain_gauge.ticks = 0;
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weather_sensors.rain_gauge.value = 0;
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if(!value) {
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anemometer_int_callback = NULL;
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rain_gauge_int_callback = NULL;
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GPIO_DISABLE_INTERRUPT(ANEMOMETER_SENSOR_PORT_BASE,
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ANEMOMETER_SENSOR_PIN_MASK);
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GPIO_DISABLE_INTERRUPT(RAIN_GAUGE_SENSOR_PORT_BASE,
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RAIN_GAUGE_SENSOR_PIN_MASK);
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return WEATHER_METER_SUCCESS;
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}
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/* Configure the wind vane */
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adc_sensors.configure(SENSORS_HW_INIT, WIND_VANE_ADC);
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/* Configure anemometer interruption */
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GPIO_SOFTWARE_CONTROL(ANEMOMETER_SENSOR_PORT_BASE, ANEMOMETER_SENSOR_PIN_MASK);
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GPIO_SET_INPUT(ANEMOMETER_SENSOR_PORT_BASE, ANEMOMETER_SENSOR_PIN_MASK);
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GPIO_DETECT_RISING(ANEMOMETER_SENSOR_PORT_BASE, ANEMOMETER_SENSOR_PIN_MASK);
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GPIO_TRIGGER_SINGLE_EDGE(ANEMOMETER_SENSOR_PORT_BASE,
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ANEMOMETER_SENSOR_PIN_MASK);
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ioc_set_over(ANEMOMETER_SENSOR_PORT, ANEMOMETER_SENSOR_PIN, IOC_OVERRIDE_DIS);
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gpio_register_callback(weather_meter_interrupt_handler, ANEMOMETER_SENSOR_PORT,
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ANEMOMETER_SENSOR_PIN);
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/* Configure rain gauge interruption */
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GPIO_SOFTWARE_CONTROL(RAIN_GAUGE_SENSOR_PORT_BASE, RAIN_GAUGE_SENSOR_PIN_MASK);
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GPIO_SET_INPUT(RAIN_GAUGE_SENSOR_PORT_BASE, RAIN_GAUGE_SENSOR_PIN_MASK);
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GPIO_DETECT_RISING(RAIN_GAUGE_SENSOR_PORT_BASE, RAIN_GAUGE_SENSOR_PIN_MASK);
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GPIO_TRIGGER_SINGLE_EDGE(RAIN_GAUGE_SENSOR_PORT_BASE,
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RAIN_GAUGE_SENSOR_PIN_MASK);
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ioc_set_over(RAIN_GAUGE_SENSOR_PORT, RAIN_GAUGE_SENSOR_PIN, IOC_OVERRIDE_DIS);
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gpio_register_callback(weather_meter_interrupt_handler, RAIN_GAUGE_SENSOR_PORT,
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RAIN_GAUGE_SENSOR_PIN);
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process_start(&weather_meter_int_process, NULL);
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GPIO_ENABLE_INTERRUPT(ANEMOMETER_SENSOR_PORT_BASE, ANEMOMETER_SENSOR_PIN_MASK);
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GPIO_ENABLE_INTERRUPT(RAIN_GAUGE_SENSOR_PORT_BASE, RAIN_GAUGE_SENSOR_PIN_MASK);
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nvic_interrupt_enable(ANEMOMETER_SENSOR_VECTOR);
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nvic_interrupt_enable(RAIN_GAUGE_SENSOR_VECTOR);
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return WEATHER_METER_SUCCESS;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(weather_meter, WEATHER_METER_SENSOR, value, configure, NULL);
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/*---------------------------------------------------------------------------*/
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/** @} */
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