altosui: Quick hacks to download megametrum data and convert to CSV

[fw/altos] / altosui / AltosMs5607.java

diff --git a/altosui/AltosMs5607.java b/altosui/AltosMs5607.java
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+/*
+ * 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; version 2 of the License.
+ *
+ * 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 altosui;
+
+public class AltosMs5607 {
+       int     reserved;
+       int     sens;
+       int     off;
+       int     tcs;
+       int     tco;
+       int     tref;
+       int     tempsens;
+       int     crc;
+
+       int             raw_pres;
+       int             raw_temp;
+       public int      pa;
+       public int      cc;
+
+       void convert() {
+               int     dT;
+               int TEMP;
+               long OFF;
+               long SENS;
+               int P;
+
+               dT = raw_temp - ((int) tref << 8);
+       
+               TEMP = (int) (2000 + (((long) dT * tempsens) >> 23));
+
+               OFF = ((long) off << 17) + (((long) tco * dT) >> 6);
+
+               SENS = ((long) sens << 16) + (((long) tcs * dT) >> 7);
+
+               if (TEMP < 2000) {
+                       int     T2 = (int) (((long) dT * (long) dT) >> 31);
+                       int TEMPM = TEMP - 2000;
+                       long OFF2 = (61 * (long) TEMPM * (long) TEMPM) >> 4;
+                       long SENS2 = 2 * (long) TEMPM * (long) TEMPM;
+                       if (TEMP < 1500) {
+                               int TEMPP = TEMP + 1500;
+                               long TEMPP2 = TEMPP * TEMPP;
+                               OFF2 = OFF2 + 15 * TEMPP2;
+                               SENS2 = SENS2 + 8 * TEMPP2;
+                       }
+                       TEMP -= T2;
+                       OFF -= OFF2;
+                       SENS -= SENS2;
+               }
+
+               pa = (int) (((((long) raw_pres * SENS) >> 21) - OFF) >> 15);
+               cc = TEMP;
+       }
+
+       public int set(int in_pres, int in_temp) {
+               raw_pres = in_pres;
+               raw_temp = in_temp;
+               convert();
+               return pa;
+       }
+}