New timing methods

examples/piface.c

@@ -0,0 +1,53 @@
+
+/*
+ * piface.c:
+ *	Simple test for the PiFace
+ *
+ *	Read the buttons and output the same to the LEDs
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+int outputs [4] = { 0,0,0,0 } ;
+
+void scanButton (int button)
+{
+  if (digitalRead (button) == LOW)
+  {
+    outputs [button] ^= 1 ;
+    digitalWrite (button, outputs [button]) ;
+  }
+
+  while (digitalRead (button) == LOW)
+    delay (1) ;
+}
+
+
+int main (void)
+{
+  int pin, button ;
+
+  printf ("Raspberry Pi wiringPiFace test program\n") ;
+
+  if (wiringPiSetupPiFace () == -1)
+    exit (1) ;
+
+// Enable internal pull-ups
+
+  for (pin = 0 ; pin < 8 ; ++pin)
+    pullUpDnControl (pin, PUD_UP) ;
+
+
+  for (;;)
+  {
+    for (button = 0 ; button < 4 ; ++button)
+      scanButton (button) ;
+    delay (1) ;
+  }
+
+  return 0 ;
+}