Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / tos / lib / tosthreads / lib / tinyld / UserButtonP.nc

diff --git a/tos/lib/tosthreads/lib/tinyld/UserButtonP.nc b/tos/lib/tosthreads/lib/tinyld/UserButtonP.nc
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+++ b/tos/lib/tosthreads/lib/tinyld/UserButtonP.nc
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+/* "Copyright (c) 2000-2003 The Regents of the University of California.  
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without written agreement
+ * is hereby granted, provided that the above copyright notice, the following
+ * two paragraphs and the author appear in all copies of this software.
+ * 
+ * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+ * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY
+ * OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
+ */
+
+/**
+ * Andew's timer debouce logic used from the CountInput application.
+ *
+ * @author Cory Sharp <cssharp@eecs.berkeley.edu>
+ * @author Andrew Redfern <aredfern@kingkong.me.berkeley.edu>
+ */
+
+module UserButtonP
+{
+  provides {
+    interface Init;
+    interface UserButton;
+  }
+  uses {
+    interface HplMsp430GeneralIO;
+    interface HplMsp430Interrupt;
+    interface Timer<TMilli>;
+  }
+}
+implementation
+{
+  command error_t Init.init()
+  {
+    atomic {
+      call HplMsp430Interrupt.disable();
+      call HplMsp430GeneralIO.makeInput();
+      call HplMsp430GeneralIO.selectIOFunc();
+      call HplMsp430Interrupt.edge(TRUE);
+      call HplMsp430Interrupt.clear();
+      call HplMsp430Interrupt.enable();
+    }
+    return SUCCESS;
+  }
+
+  event void Timer.fired()
+  {
+    atomic {
+      call HplMsp430Interrupt.clear();
+      call HplMsp430Interrupt.enable();
+    }
+  }
+
+  task void debounce()
+  {
+    call Timer.startOneShot(100);
+    signal UserButton.fired();
+  }
+
+  async event void HplMsp430Interrupt.fired()
+  {
+    atomic {
+      call HplMsp430Interrupt.disable();
+      post debounce();
+    }
+  }
+}
+