Diff: main.cpp

Revision:

0:e4efa77cbd55

Child:

1:af16896c2662

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 02 20:34:27 2016 +0000
@@ -0,0 +1,41 @@
+
+/*
+ * Reads an input on pin PB_4, only when its value has been changed
+ */
+ 
+#include "mbed.h"
+#include "Hotboards_switches.h"
+
+// Creates a single sw object, this interrupt will give us a LOW(0) value when close
+// because our dip switch works with pull-ups
+Hotboards_switches sw( PB_4 );
+// If your dip switch will gave you a HIGH(1) value when close, then we need to create
+// the sw object with an extra parameter: Hotboards_switches sw( PB_4 , 1 );
+// In any case the function will return a HIGH(1) value any time the sw is closed
+
+// For this example we will use the USB serial port, here we initialize it
+Serial pc(USBTX,USBRX);
+
+int main()
+{
+    while(1)
+    {
+        //Asks when the interrupt changes its value
+        if( sw.hasItChange( ) )
+        {
+            // When the interrupt is close (or ON) the function will return a true value
+            // it doesn´t matter if our input is configured with pull-ups(LOW) or
+            // pull-downs(HIGH)
+            if( sw.read( ) )
+            {
+                pc.printf( "sw = close (on)\n\r" );
+            }
+            else
+            {
+                pc.printf( "sw = open (off)\n\r" );
+            }
+            // Wait 250 ms, just to not query so often
+            wait_ms( 250 );
+        }
+    }
+}