initial cleanup and mapping

examples/Gertboard/temperature.c

@@ -0,0 +1,78 @@
+/*
+ * temperature.c:
+ *	Demonstrate use of the Gertboard A to D converter to make
+ *	a simple thermometer using the LM35.
+ *
+ * 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 <gertboard.h>
+
+int main ()
+{
+  int x1, x2 ;
+  double v1, v2 ;
+
+  printf ("\n") ;
+  printf ("Gertboard demo: Simple Thermemeter\n") ;
+  printf ("==================================\n") ;
+
+// Always initialise wiringPi. Use wiringPiSys() if you don't need
+//	(or want) to run as root
+
+  wiringPiSetupSys () ;
+
+// Initialise the Gertboard analog hardware at pin 100
+
+  gertboardAnalogSetup (100) ;
+
+  printf ("\n") ;
+  printf ("| Channel 0 | Channel 1 | Temperature 1 | Temperature 2 |\n") ;
+
+  for (;;)
+  {
+
+// Read the 2 channels:
+
+    x1 = analogRead (100) ;
+    x2 = analogRead (101) ;
+
+// Convert to a voltage:
+
+    v1 = (double)x1 / 1023.0 * 3.3 ;
+    v2 = (double)x2 / 1023.0 * 3.3 ;
+
+// Print
+
+    printf ("|    %6.3f |    %6.3f |", v1, v2) ;
+
+// Print Temperature of both channels by converting the LM35 reading
+//	to a temperature. Fortunately these are easy: 0.01 volts per C.
+
+    printf ("          %4.1f |          %4.1f |\r", v1 * 100.0, v2 * 100.0) ;
+    fflush (stdout) ;
+  }
+
+  return 0 ;
+}
+