initial cleanup and mapping

examples/Gertboard/record.c

@@ -0,0 +1,60 @@
+/*
+ * record.c:
+ *	Record some audio via the Gertboard
+ *
+ *	Copyright (c) 2013 Gordon Henderson
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <sys/time.h>
+
+#include <wiringPi.h>
+#include <gertboard.h>
+
+#define	B_SIZE	40000
+
+int main ()
+{
+  int i ;
+  struct timeval tStart, tEnd, tTaken ;
+  unsigned char buffer [B_SIZE] ;
+
+  printf ("\n") ;
+  printf ("Gertboard demo: Recorder\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) ;
+
+  gettimeofday (&tStart, NULL) ;
+
+  for (i = 0 ; i < B_SIZE ; ++i)
+    buffer [i] = analogRead (100) >> 2 ;
+
+  gettimeofday (&tEnd, NULL) ;
+  
+  timersub (&tEnd, &tStart, &tTaken) ;
+
+  printf ("Time taken for %d  reads: %ld.%ld\n", B_SIZE, tTaken.tv_sec, tTaken.tv_usec) ;
+
+  gettimeofday (&tStart, NULL) ;
+
+  for (i = 0 ; i < B_SIZE ; ++i)
+   analogWrite (100, buffer [i]) ;
+
+  gettimeofday (&tEnd, NULL) ;
+  
+  timersub (&tEnd, &tStart, &tTaken) ;
+
+  printf ("Time taken for %d writes: %ld.%ld\n", B_SIZE, tTaken.tv_sec, tTaken.tv_usec) ;
+
+  return 0 ;
+}
+