Reworked instant wind speed calculation and extended the available wind speed return values
This commit is contained in:
Antonio Lignan
parent
0cb80b0605
commit
61f1516369
3 changed files with 111 additions and 46 deletions
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@ -56,8 +56,8 @@
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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#define READ_SENSOR_PERIOD CLOCK_SECOND
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#define ANEMOMETER_THRESHOLD_TICK 8
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#define RAIN_GAUGE_THRESHOLD_TICK 15
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#define ANEMOMETER_THRESHOLD_TICK 13 /**< 16 Km/h */
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#define RAIN_GAUGE_THRESHOLD_TICK 15 /**< each increment of 4.19 mm */
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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/*---------------------------------------------------------------------------*/
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@ -67,6 +67,7 @@ AUTOSTART_PROCESSES(&test_weather_meter_sensors);
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static void
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rain_callback(uint16_t value)
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{
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/* To calculate ticks from mm of rain, divide by 0.2794 mm */
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printf("*** Rain gauge over threshold (%u ticks)\n", value);
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weather_meter.configure(WEATHER_METER_RAIN_GAUGE_INT_OVER,
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(value + RAIN_GAUGE_THRESHOLD_TICK));
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@ -75,6 +76,12 @@ rain_callback(uint16_t value)
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static void
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wind_speed_callback(uint16_t value)
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{
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/* This checks for instant wind speed values (over a second), the minimum
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* value is 1.2 Km/h (one tick), as the reference is 2.4KM/h per rotation, and
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* the anemometer makes 2 ticks per rotation. Instant speed is calculated as
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* multiples of this, so if you want to check for 16Km/h, then it would be 13
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* ticks
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*/
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printf("*** Wind speed over threshold (%u ticks)\n", value);
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}
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/*---------------------------------------------------------------------------*/
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@ -85,6 +92,9 @@ PROCESS_THREAD(test_weather_meter_sensors, ev, data)
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static uint32_t rain;
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static uint16_t wind_speed;
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static uint16_t wind_dir;
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static uint16_t wind_speed_avg;
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static uint16_t wind_speed_avg_2m;
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static uint16_t wind_speed_max;
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/* Register the callback handler when thresholds are met */
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WEATHER_METER_REGISTER_ANEMOMETER_INT(wind_speed_callback);
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@ -109,6 +119,9 @@ PROCESS_THREAD(test_weather_meter_sensors, ev, data)
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rain = weather_meter.value(WEATHER_METER_RAIN_GAUGE);
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wind_speed = weather_meter.value(WEATHER_METER_ANEMOMETER);
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wind_dir = weather_meter.value(WEATHER_METER_WIND_VANE);
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wind_speed_avg = weather_meter.value(WEATHER_METER_ANEMOMETER_AVG);
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wind_speed_avg_2m = weather_meter.value(WEATHER_METER_ANEMOMETER_AVG_2M);
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wind_speed_max = weather_meter.value(WEATHER_METER_ANEMOMETER_MAX);
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#if WEATHER_METER_RAIN_RETURN_TICKS
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rain *= WEATHER_METER_AUX_RAIN_MM;
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@ -122,8 +135,12 @@ PROCESS_THREAD(test_weather_meter_sensors, ev, data)
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printf("Rain: 0.%lu mm, ", rain);
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}
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printf("Wind (dir: %u deg, ", wind_dir);
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printf("speed %u m/h)\n", wind_speed);
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printf("Wind dir: %u deg,\n", wind_dir);
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printf("Wind speed: %u m/h ", wind_speed);
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printf("(%u m/h avg, %u m/h 2m avg, %u m/h max)\n\n", wind_speed_avg,
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wind_speed_avg_2m,
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wind_speed_max);
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etimer_reset(&et);
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}
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@ -53,7 +53,7 @@
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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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#include "sys/rtimer.h"
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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@ -62,7 +62,7 @@
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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#define DEBOUNCE_DURATION (CLOCK_SECOND >> 4)
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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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@ -77,7 +77,7 @@ static uint8_t enabled;
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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 rtimer rt;
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static struct timer debouncetimer;
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/*---------------------------------------------------------------------------*/
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typedef struct {
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@ -87,12 +87,65 @@ typedef struct {
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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_2m;
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uint16_t value_avg_2m;
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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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static weather_meter_sensors weather_sensors;
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static weather_meter_ext_t anemometer;
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/*---------------------------------------------------------------------------*/
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void
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rt_callback(struct rtimer *t, void *ptr)
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{
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uint32_t wind_speed;
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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_2m += 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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/* Average every 2 minutes */
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if(!(anemometer.ticks_avg % 120)) {
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if(anemometer.value_buf_2m) {
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anemometer.value_avg_2m = anemometer.value_buf_2m / 120;
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anemometer.value_buf_2m = 0;
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} else {
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anemometer.value_avg_2m = 0;
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}
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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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rtimer_set(&rt, RTIMER_NOW() + RTIMER_SECOND, 1, rt_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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@ -100,10 +153,6 @@ 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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@ -121,33 +170,6 @@ PROCESS_THREAD(weather_meter_int_process, ev, data)
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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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if(ev == PROCESS_EVENT_TIMER) {
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if(weather_sensors.anemometer.ticks) {
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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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/* 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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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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}
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}
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PROCESS_END();
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}
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@ -184,8 +206,14 @@ weather_meter_interrupt_handler(uint8_t port, uint8_t pin)
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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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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_ANEMOMETER_AVG) &&
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(type != WEATHER_METER_ANEMOMETER_AVG_2M) &&
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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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@ -204,6 +232,19 @@ value(int type)
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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_2M:
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return anemometer.value_avg_2m;
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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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@ -234,6 +275,9 @@ configure(int type, int value)
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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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@ -278,6 +322,7 @@ configure(int type, int value)
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RAIN_GAUGE_SENSOR_PIN);
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process_start(&weather_meter_int_process, NULL);
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rtimer_set(&rt, RTIMER_NOW() + RTIMER_SECOND, 1, rt_callback, 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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@ -53,9 +53,12 @@
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* \name Weather meter sensor return and operation values
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* @{
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*/
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#define WEATHER_METER_ANEMOMETER 0x00
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#define WEATHER_METER_RAIN_GAUGE 0x01
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#define WEATHER_METER_WIND_VANE 0x02
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#define WEATHER_METER_ANEMOMETER 0x03
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#define WEATHER_METER_ANEMOMETER_AVG 0x04
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#define WEATHER_METER_ANEMOMETER_AVG_2M 0x05
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#define WEATHER_METER_ANEMOMETER_MAX 0x06
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#define WEATHER_METER_ACTIVE SENSORS_ACTIVE
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#define WEATHER_METER_ANEMOMETER_INT_OVER HW_INT_OVER_THRS
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@ -66,11 +69,11 @@
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#define WEATHER_METER_SUCCESS 0
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#define WEATHER_METER_ERROR (-1)
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#define WEATHER_METER_ANEMOMETER_RADIUS 65 /**< 65.2 mm pin to cup centre */
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#define WEATHER_METER_AUX_CAL 377 /**< 2*pi*60 (376.992 rounded) */
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#define WEATHER_METER_AUX_ANGULAR (WEATHER_METER_ANEMOMETER_RADIUS * \
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WEATHER_METER_AUX_CAL)
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#define WEATHER_METER_AUX_RAIN_MM 2794 /**< 0.2794mm per tick */
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/* 2.4Km/h per tick, 2 per rotation */
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#define WEATHER_METER_ANEMOMETER_SPEED_1S (1200)
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/* 0.2794mm per tick */
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#define WEATHER_METER_AUX_RAIN_MM 2794
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#ifdef WEATHER_METER_RAIN_CONF_RETURN
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#define WEATHER_METER_RAIN_RETURN_TICKS WEATHER_METER_RAIN_CONF_RETURN
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