Merge devel code into the trunk.

[tinyos-2.x.git] / tos / platforms / mica / Alarm32khz32C.nc

diff --git a/tos/platforms/mica/Alarm32khz32C.nc b/tos/platforms/mica/Alarm32khz32C.nc
new file mode 100644 (file)
index 0000000..6f58eab
--- /dev/null
+++ b/tos/platforms/mica/Alarm32khz32C.nc
@@ -0,0 +1,39 @@
+// $Id$
+/*
+ * Copyright (c) 2005-2006 Intel Corporation
+ * All rights reserved.
+ *
+ * This file is distributed under the terms in the attached INTEL-LICENSE     
+ * file. If you do not find these files, copies can be found by writing to
+ * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
+ * 94704.  Attention:  Intel License Inquiry.
+ */
+/**
+ * 32-bit 32kHz Alarm component as per TEP102 HAL guidelines. The mica
+ * family 32kHz Alarm is built on hardware timer 1, and actually runs at
+ * CPU frequency / 256. You can use the MeasureClockC.cyclesPerJiffy()
+ * command to figure out the exact frequency.
+ * <p>
+ * Upto three of these alarms can be created (one per hardware compare
+ * register). Note that creating one of these Alarms consumes a 16-bit
+ * 32kHz Alarm (see Alarm32khz16C).
+ *
+ * @author David Gay <dgay@intel-research.net>
+ */
+
+#include <MicaTimer.h>
+
+generic configuration Alarm32khz32C()
+{
+  provides interface Alarm<T32khz, uint32_t>;
+}
+implementation
+{
+  components new AlarmOne16C() as Alarm16, Counter32khz32C as Counter32,
+    new TransformAlarmC(T32khz, uint32_t, TOne, uint16_t,
+                       MICA_DIVIDE_ONE_FOR_32KHZ_LOG2) as Transform32;
+
+  Alarm = Transform32;
+  Transform32.AlarmFrom -> Alarm16;
+  Transform32.Counter -> Counter32;
+}