Initial Commit - Copy from Altus Metrum AltOS

altoslib/AltosMag.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+package org.altusmetrum.altoslib_14;
+
+import java.util.concurrent.*;
+import java.io.*;
+
+public class AltosMag implements Cloneable {
+	public int		along = AltosLib.MISSING;
+	public int		across = AltosLib.MISSING;
+	public int		through = AltosLib.MISSING;
+
+	public static final int model_hmc5883 = 0;
+	public static final int model_mmc5983 = 1;
+
+	public int mag_model = AltosLib.MISSING;
+
+	public static final double counts_per_gauss_hmc5883 = 1090;
+	public static final double counts_per_gauss_mmc5983 = 4096;
+
+	public static double counts_per_gauss(int imu_type, int mag_model) {
+		switch(mag_model) {
+		case AltosLib.model_hmc5883:
+			return counts_per_gauss_hmc5883;
+		case AltosLib.model_mmc5983:
+			return counts_per_gauss_mmc5983;
+		}
+		switch (imu_type) {
+		case AltosIMU.imu_type_telemega_v1_v2:
+		case AltosIMU.imu_type_easymega_v1:
+			return counts_per_gauss_hmc5883;
+		case AltosIMU.imu_type_easytimer_v2:
+			return counts_per_gauss_mmc5983;
+		}
+
+		return AltosIMU.counts_per_gauss(imu_type, mag_model);
+	}
+
+	public static double convert_gauss(double counts, int imu_type, int mag_model) {
+		double cpg = counts_per_gauss(imu_type, mag_model);
+
+		if (cpg == AltosLib.MISSING)
+			return AltosLib.MISSING;
+
+		return counts / cpg;
+	}
+
+	public boolean parse_string(String line) {
+
+		if (line.startsWith("X:")) {
+
+			String[] items = line.split("\\s+");
+
+			mag_model = model_hmc5883;
+
+			if (items.length >= 6) {
+				across = Integer.parseInt(items[1]);
+				through = Integer.parseInt(items[3]);
+				along = Integer.parseInt(items[5]);
+			}
+			return true;
+		}
+		if (line.startsWith("MMC5983:")) {
+			String[] items = line.split("\\s+");
+
+			mag_model = model_mmc5983;
+
+			if (items.length >= 4) {
+				along = Integer.parseInt(items[1]);
+				across = Integer.parseInt(items[2]);
+				through = Integer.parseInt(items[3]);
+			}
+			return true;
+		}
+
+		return false;
+	}
+
+	public AltosMag clone() {
+		AltosMag n = new AltosMag();
+
+		n.along = along;
+		n.across = across;
+		n.through = through;
+		return n;
+	}
+
+	public AltosMag() {
+	}
+
+	static public void provide_data(AltosDataListener listener, AltosLink link) throws InterruptedException {
+		try {
+			AltosMag	mag = new AltosMag(link);
+			AltosCalData	cal_data = listener.cal_data();
+
+			if (mag != null) {
+				if (mag.mag_model != AltosLib.MISSING)
+					cal_data.set_mag_model(mag.mag_model);
+				listener.set_mag(cal_data.mag_along(mag.along),
+						 cal_data.mag_across(mag.across),
+						 cal_data.mag_through(mag.through));
+			}
+		} catch (TimeoutException te) {
+		}
+	}
+
+	public AltosMag(AltosLink link) throws InterruptedException, TimeoutException {
+		this();
+		link.printf("M\n");
+		for (;;) {
+			String line = link.get_reply_no_dialog(5000);
+			if (line == null) {
+				throw new TimeoutException();
+			}
+			if (parse_string(line))
+				break;
+		}
+	}
+}