initial cleanup and mapping

examples/rht03.c

@@ -0,0 +1,69 @@
+/*
+ * rht03.c:
+ *	Driver for the MaxDetect series sensors
+ *
+ * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
+ ***********************************************************************
+ * This file is part of wiringPi:
+ *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ *    wiringPi is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    wiringPi 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 Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+
+#include <wiringPi.h>
+#include <maxdetect.h>
+
+#define	RHT03_PIN	0
+
+/*
+ ***********************************************************************
+ * The main program
+ ***********************************************************************
+ */
+
+int main (void)
+{
+  int temp, rh ;
+  int newTemp, newRh ;
+
+  temp = rh = newTemp = newRh = 0 ;
+
+  wiringPiSetup () ;
+  piHiPri       (55) ;
+
+  for (;;)
+  {
+    delay (100) ;
+
+    if (!readRHT03 (RHT03_PIN, &newTemp, &newRh))
+      continue ;
+
+    if ((temp != newTemp) || (rh != newRh))
+    {
+      temp = newTemp ;
+      rh   = newRh ;
+      if ((temp & 0x8000) != 0)	// Negative
+      {
+	temp &= 0x7FFF ;
+	temp = -temp ;
+      }
+      printf ("Temp: %5.1f, RH: %5.1f%%\n", temp / 10.0, rh / 10.0) ;
+    }
+  }
+
+  return 0 ;
+}