503 lines
18 KiB
C
503 lines
18 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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* 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-zoul.h"
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#include "dev/weather-meter.h"
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#include "dev/zoul-sensors.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/gpio-hal.h"
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#include "dev/ioc.h"
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#include "sys/timer.h"
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#include "sys/ctimer.h"
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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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)(uint16_t value);
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void (*anemometer_int_callback)(uint16_t value);
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/*---------------------------------------------------------------------------*/
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static uint8_t enabled;
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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 ctimer ct;
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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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uint8_t int_en;
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uint16_t int_thres;
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} weather_meter_sensors_t;
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typedef struct {
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uint16_t value_max;
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uint64_t ticks_avg;
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uint64_t value_avg;
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uint32_t value_buf_xm;
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uint16_t value_avg_xm;
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} weather_meter_ext_t;
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typedef struct {
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uint16_t wind_vane;
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weather_meter_sensors_t rain_gauge;
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weather_meter_sensors_t anemometer;
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} weather_meter_sensors;
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typedef struct {
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int32_t value_buf_xm;
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int16_t value_prev;
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int16_t value_avg_xm;
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} weather_meter_wind_vane_ext_t;
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static weather_meter_sensors weather_sensors;
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static weather_meter_ext_t anemometer;
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static weather_meter_wind_vane_ext_t wind_vane;
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/*---------------------------------------------------------------------------*/
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typedef struct {
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uint16_t mid_point;
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uint16_t degree;
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} wind_vane_mid_point_t;
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/* From the datasheet we adjusted the values for a 3V divider, using a 10K
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* resistor, the check values are the following:
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* --------------------+------------------+-------------------------------
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* Direction (Degrees) Resistance (Ohms) Voltage (mV)
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* 0 33k 2532.55 *
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* 22.5 6.57k 1308.44 *
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* 45 8.2k 1486.81 *
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* 67.5 891 269.97 *
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* 90 1k 300.00 *
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* 112.5 688 212.42 *
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* 135 2.2k 595.08 *
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* 157.5 1.41k 407.80 *
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* 180 3.9k 925.89 *
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* 202.5 3.14k 788.58 *
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* 225 16k 2030.76 *
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* 247.5 14.12k 1930.84 *
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* 270 120k 3046.15 *
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* 292.5 42.12k 2666.84 *
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* 315 64.9k 2859.41 *
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* 337.5 21.88k 2264.86 *
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* --------------------+------------------+-------------------------------
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*/
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static const wind_vane_mid_point_t wind_vane_table[16] = {
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{ 2124, 1125 },
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{ 2699, 675 },
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{ 3000, 900 },
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{ 4078, 1575 },
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{ 5950, 1350 },
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{ 7885, 2025 },
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{ 9258, 1800 },
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{ 13084, 225 },
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{ 14868, 450 },
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{ 19308, 2475 },
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{ 20307, 2250 },
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{ 22648, 3375 },
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{ 25325, 0 },
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{ 26668, 2925 },
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{ 28594, 3150 },
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{ 30461, 2700 },
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};
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/*---------------------------------------------------------------------------*/
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static int
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weather_meter_wind_vane_degrees(uint16_t value)
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{
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uint8_t i;
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for(i = 0; i < 16; i++) {
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if(value <= wind_vane_table[i].mid_point) {
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return (int)wind_vane_table[i].degree;
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} else {
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if(i == 15) {
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return (int)wind_vane_table[i].degree;
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}
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}
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}
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PRINTF("Weather: invalid wind vane value\n");
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return WEATHER_METER_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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weather_meter_get_wind_dir(void)
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{
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weather_sensors.wind_vane = adc_zoul.value(WIND_VANE_ADC);
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if((int16_t)weather_sensors.wind_vane < 0) {
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weather_sensors.wind_vane = 0;
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}
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return weather_meter_wind_vane_degrees(weather_sensors.wind_vane);
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}
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/*---------------------------------------------------------------------------*/
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static void
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ct_callback(void *ptr)
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{
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uint32_t wind_speed;
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int16_t wind_dir;
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int16_t wind_dir_delta;
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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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wind_speed = weather_sensors.anemometer.ticks;
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wind_speed *= WEATHER_METER_ANEMOMETER_SPEED_1S;
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weather_sensors.anemometer.value = (uint16_t)wind_speed;
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anemometer.ticks_avg++;
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anemometer.value_avg += weather_sensors.anemometer.value;
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anemometer.value_buf_xm += weather_sensors.anemometer.value;
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/* Take maximum value */
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if(weather_sensors.anemometer.value > anemometer.value_max) {
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anemometer.value_max = weather_sensors.anemometer.value;
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}
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/* Mitsuta method to get the wind direction average */
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wind_dir = weather_meter_get_wind_dir();
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wind_dir_delta = wind_dir - wind_vane.value_prev;
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if(wind_dir_delta < -1800) {
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wind_vane.value_prev += wind_dir_delta + 3600;
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} else if(wind_dir_delta > 1800) {
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wind_vane.value_prev += wind_dir_delta - 3600;
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} else {
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wind_vane.value_prev += wind_dir_delta;
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}
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wind_vane.value_buf_xm += wind_vane.value_prev;
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/* Calculate the 2 minute average */
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if(!(anemometer.ticks_avg % WEATHER_METER_AVG_PERIOD)) {
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PRINTF("\nWeather: calculate the %u averages ***\n", WEATHER_METER_AVG_PERIOD);
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if(anemometer.value_buf_xm) {
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anemometer.value_avg_xm = anemometer.value_buf_xm / WEATHER_METER_AVG_PERIOD;
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anemometer.value_buf_xm = 0;
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} else {
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anemometer.value_avg_xm = 0;
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}
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if(wind_vane.value_buf_xm >= 0) {
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wind_vane.value_buf_xm = wind_vane.value_buf_xm / WEATHER_METER_AVG_PERIOD;
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wind_vane.value_avg_xm = wind_vane.value_buf_xm;
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} else {
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wind_vane.value_buf_xm = ABS(wind_vane.value_buf_xm) / WEATHER_METER_AVG_PERIOD;
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wind_vane.value_avg_xm = wind_vane.value_buf_xm;
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wind_vane.value_avg_xm = ~wind_vane.value_avg_xm + 1;
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}
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if(wind_vane.value_avg_xm >= 3600) {
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wind_vane.value_avg_xm -= 3600;
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} else if(wind_vane.value_avg_xm < 0) {
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wind_vane.value_avg_xm += 3600;
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}
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wind_vane.value_buf_xm = 0;
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wind_vane.value_prev = wind_dir;
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}
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/* Check for roll-over */
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if(!anemometer.ticks_avg) {
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anemometer.value_avg = 0;
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}
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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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ctimer_set(&ct, CLOCK_SECOND, ct_callback, NULL);
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}
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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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while(1) {
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PROCESS_YIELD();
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if((ev == anemometer_int_event) && (weather_sensors.anemometer.int_en)) {
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if(weather_sensors.anemometer.ticks >=
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weather_sensors.anemometer.int_thres) {
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anemometer_int_callback(weather_sensors.anemometer.ticks);
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}
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}
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if((ev == rain_gauge_int_event) && (weather_sensors.rain_gauge.int_en)) {
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if(weather_sensors.rain_gauge.ticks >=
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weather_sensors.rain_gauge.int_thres) {
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rain_gauge_int_callback(weather_sensors.rain_gauge.ticks);
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static void weather_meter_interrupt_handler(gpio_hal_pin_mask_t pin_mask);
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/*---------------------------------------------------------------------------*/
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static gpio_hal_event_handler_t rain_handler = {
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.next = NULL,
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.handler = weather_meter_interrupt_handler,
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.pin_mask = gpio_hal_pin_to_mask(RAIN_GAUGE_SENSOR_PIN) << (RAIN_GAUGE_SENSOR_PORT << 3),
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};
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/*---------------------------------------------------------------------------*/
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static gpio_hal_event_handler_t anemometer_handler = {
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.next = NULL,
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.handler = weather_meter_interrupt_handler,
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.pin_mask = gpio_hal_pin_to_mask(ANEMOMETER_SENSOR_PIN) << (ANEMOMETER_SENSOR_PORT << 3),
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};
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/*---------------------------------------------------------------------------*/
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static void
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weather_meter_interrupt_handler(gpio_hal_pin_mask_t pin_mask)
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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(pin_mask == rain_handler.pin_mask) {
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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(pin_mask == anemometer_handler.pin_mask) {
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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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uint64_t aux;
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if((type != WEATHER_METER_ANEMOMETER) &&
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(type != WEATHER_METER_RAIN_GAUGE) &&
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(type != WEATHER_METER_WIND_VANE) &&
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(type != WEATHER_METER_WIND_VANE_AVG_X) &&
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(type != WEATHER_METER_ANEMOMETER_AVG) &&
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(type != WEATHER_METER_ANEMOMETER_AVG_X) &&
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(type != WEATHER_METER_ANEMOMETER_MAX)) {
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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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if(!enabled) {
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PRINTF("Weather: module is not configured\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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return weather_meter_get_wind_dir();
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case WEATHER_METER_WIND_VANE_AVG_X:
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return wind_vane.value_avg_xm;
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case WEATHER_METER_ANEMOMETER:
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return weather_sensors.anemometer.value;
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case WEATHER_METER_ANEMOMETER_AVG:
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if(anemometer.value_avg <= 0) {
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return (uint16_t)anemometer.value_avg;
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}
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aux = anemometer.value_avg / anemometer.ticks_avg;
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return (uint16_t)aux;
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case WEATHER_METER_ANEMOMETER_AVG_X:
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return anemometer.value_avg_xm;
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case WEATHER_METER_ANEMOMETER_MAX:
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return anemometer.value_max;
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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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(type != WEATHER_METER_ANEMOMETER_INT_OVER) &&
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(type != WEATHER_METER_RAIN_GAUGE_INT_OVER) &&
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(type != WEATHER_METER_ANEMOMETER_INT_DIS) &&
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(type != WEATHER_METER_RAIN_GAUGE_INT_DIS)) {
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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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if(type == WEATHER_METER_ACTIVE) {
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anemometer.value_avg = 0;
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anemometer.ticks_avg = 0;
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weather_sensors.anemometer.int_en = 0;
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weather_sensors.rain_gauge.int_en = 0;
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weather_sensors.anemometer.ticks = 0;
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weather_sensors.rain_gauge.ticks = 0;
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weather_sensors.anemometer.value = 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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process_exit(&weather_meter_int_process);
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enabled = 0;
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PRINTF("Weather: disabled\n");
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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_zoul.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_hal_register_handler(&anemometer_handler);
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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);
|
|
gpio_hal_register_handler(&rain_handler);
|
|
|
|
process_start(&weather_meter_int_process, NULL);
|
|
|
|
/* Initialize here prior the first second tick */
|
|
wind_vane.value_prev = weather_meter_get_wind_dir();
|
|
|
|
ctimer_set(&ct, CLOCK_SECOND, ct_callback, NULL);
|
|
|
|
GPIO_ENABLE_INTERRUPT(ANEMOMETER_SENSOR_PORT_BASE, ANEMOMETER_SENSOR_PIN_MASK);
|
|
GPIO_ENABLE_INTERRUPT(RAIN_GAUGE_SENSOR_PORT_BASE, RAIN_GAUGE_SENSOR_PIN_MASK);
|
|
NVIC_EnableIRQ(ANEMOMETER_SENSOR_VECTOR);
|
|
NVIC_EnableIRQ(RAIN_GAUGE_SENSOR_VECTOR);
|
|
|
|
enabled = 1;
|
|
PRINTF("Weather: started\n");
|
|
return WEATHER_METER_SUCCESS;
|
|
}
|
|
|
|
switch(type) {
|
|
case WEATHER_METER_ANEMOMETER_INT_OVER:
|
|
weather_sensors.anemometer.int_en = 1;
|
|
weather_sensors.anemometer.int_thres = value;
|
|
PRINTF("Weather: anemometer threshold %u\n", value);
|
|
break;
|
|
case WEATHER_METER_RAIN_GAUGE_INT_OVER:
|
|
weather_sensors.rain_gauge.int_en = 1;
|
|
weather_sensors.rain_gauge.int_thres = value;
|
|
PRINTF("Weather: rain gauge threshold %u\n", value);
|
|
break;
|
|
case WEATHER_METER_ANEMOMETER_INT_DIS:
|
|
PRINTF("Weather: anemometer int disabled\n");
|
|
weather_sensors.anemometer.int_en = 0;
|
|
break;
|
|
case WEATHER_METER_RAIN_GAUGE_INT_DIS:
|
|
PRINTF("Weather: rain gauge int disabled\n");
|
|
weather_sensors.rain_gauge.int_en = 0;
|
|
break;
|
|
default:
|
|
return WEATHER_METER_ERROR;
|
|
}
|
|
|
|
return WEATHER_METER_SUCCESS;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(weather_meter, WEATHER_METER_SENSOR, value, configure, NULL);
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|
|
|