Revision 0:7f3a988c1be5, committed 2010-09-27

Comitter:

okini3939

Date:

Mon Sep 27 16:03:25 2010 +0000

Commit message:

Changed in this revision

diff -r 000000000000 -r 7f3a988c1be5 WeatherMeters/WeatherMeters.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WeatherMeters/WeatherMeters.cpp	Mon Sep 27 16:03:25 2010 +0000
@@ -0,0 +1,109 @@
+/*
+ * mbed library to use a Sparkfun Weather Meters
+ * Copyright (c) 2010 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#include "mbed.h"
+#include "WeatherMeters.h"
+
+#define WEATHER_VREF 3.3
+
+const float tbl_windvane[16][2] = {
+  {0.0, 33000}, {22.5, 6570}, {45.0, 8200}, {67.5, 891},
+  {90.0, 1000}, {112.5, 688}, {135.0, 2200}, {157.5, 1410},
+  {180.0, 3900}, {202.5, 3140}, {225.0, 16000}, {247.5, 14120},
+  {270.0, 120000}, {292.5, 42120}, {315.0, 64900}, {337.5, 21880} 
+};
+
+WeatherMeters::WeatherMeters (PinName p_anemometer, PinName p_windvane, PinName p_raingauge, Weather_mode w_mode) : int01(p_anemometer), int02(p_raingauge), ain01(p_windvane) {
+    int i;
+
+    windspeed = 0; windvane = 0; raingauge = 0;
+    count_anemo = 0; count_rain = 0; time_anemo = 0; time_rain = 0;
+    for (i = 0; i < 12; i ++) {
+        buf_anemo[i] = 0;
+        buf_rain[i] = 0;
+    }
+
+    mode = w_mode;
+    int01.fall(this, &WeatherMeters::int_anemometer);
+    int02.fall(this, &WeatherMeters::int_raingauge);
+    ticker01.attach(this, &WeatherMeters::int_timer, 0.25); 
+}
+
+float WeatherMeters::get_windspeed() {
+    float s;
+    
+    if (mode == Weather_auto) { 
+        s = (float)windspeed * 0.667 / 3.0; // 0.667m/s/Hz (/3s)
+        windspeed = 0;
+    } else {
+        s = (float)count_anemo * 0.667 / ((float)time_anemo / 4.0); // 0.667m/s/Hz
+        time_anemo = 0;
+        count_anemo = 0;
+    }
+    return s;
+}
+
+float WeatherMeters::get_windvane() {
+    int i;
+    float v;
+
+    if (windspeed == 0) windvane = ain01;
+	v = windvane * WEATHER_VREF; // V
+	v = v / ((WEATHER_VREF - v) / 10000.0); // ohm
+	for (i = 0; i < 16; i ++) {
+		if (v > tbl_windvane[i][1] * 0.9 && v < tbl_windvane[i][1] * 1.1) {
+			return tbl_windvane[i][0];
+		}
+	}
+    return 0;
+}
+
+float WeatherMeters::get_raingauge() {
+    return (float)raingauge * 0.2794; // 0.2794mm/Hz
+}
+
+void WeatherMeters::int_anemometer () {
+    count_anemo ++;
+}
+
+void WeatherMeters::int_raingauge () {
+    count_rain ++;
+}
+
+void WeatherMeters::int_timer () {
+    int i, n;
+    
+    if (mode == Weather_auto) {
+        n = 0;
+        for (i = 11; i > 0; i --) {
+            buf_anemo[i] = buf_anemo[i - 1];
+            n = n + buf_anemo[i];
+        }
+        buf_anemo[0] = count_anemo;
+        n = n + buf_anemo[0];
+        count_anemo = 0;
+        if (n > windspeed) {
+            windspeed = n;
+            windvane = ain01;
+        }
+    } else {
+        time_anemo ++;
+    }
+    
+	time_rain ++;
+	if (time_rain >= 4 * 300) {
+		n = 0;
+		for (i = 11; i > 0; i --) {
+			buf_rain[i] = buf_rain[i - 1];
+			n = n + buf_rain[i];
+		}
+		buf_rain[0] = count_rain;
+		n = n + buf_rain[0];
+		count_rain = 0;
+		time_rain = 0;
+		raingauge = n;
+	}
+}

diff -r 000000000000 -r 7f3a988c1be5 WeatherMeters/WeatherMeters.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WeatherMeters/WeatherMeters.h	Mon Sep 27 16:03:25 2010 +0000
@@ -0,0 +1,44 @@
+/*
+ * mbed library to use a Sparkfun Weather Meters
+ * Copyright (c) 2010 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+ 
+#ifndef WeatherMeters_H
+#define WeatherMeters_H
+
+#include "mbed.h"
+
+enum Weather_mode {
+    Weather_manual = 0,
+    Weather_auto = 1
+};
+
+class WeatherMeters : public Base {
+public:
+    WeatherMeters(PinName p_anemometer, PinName p_windvane, PinName p_raingauge, Weather_mode w_mode = Weather_auto);
+
+    float get_windspeed();
+    float get_windvane();
+    float get_raingauge();
+    void update();
+
+protected:
+    void int_anemometer ();
+    void int_raingauge ();
+    void int_timer ();
+
+    InterruptIn int01, int02;
+    AnalogIn ain01;
+    Ticker ticker01;
+    int windspeed, raingauge;
+    float windvane;
+    int mode;
+
+private:
+
+    int count_anemo, count_rain, time_anemo, time_rain;
+    int buf_anemo[12], buf_rain[12];
+};
+
+#endif

diff -r 000000000000 -r 7f3a988c1be5 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Sep 27 16:03:25 2010 +0000
@@ -0,0 +1,18 @@
+#include "mbed.h"
+#include "WeatherMeters.h"
+
+WeatherMeters wmeters(p30, p17, p21); // anemo, vane, rain
+
+DigitalOut myled(LED1);
+Serial pc(USBTX, USBRX);
+
+int main() {
+    while(1) {
+        myled = 1;
+
+        pc.printf("a:%6.2f m/s / v:%6.2f / r:%6.2f mm\n", wmeters.get_windspeed(), wmeters.get_windvane(), wmeters.get_raingauge());
+
+        myled = 0;
+        wait(10);
+    }
+}

diff -r 000000000000 -r 7f3a988c1be5 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Mon Sep 27 16:03:25 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e