Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / tos / chips / m16c62p / timer / M16c62pCounter32C.nc

diff --git a/tos/chips/m16c62p/timer/M16c62pCounter32C.nc b/tos/chips/m16c62p/timer/M16c62pCounter32C.nc
new file mode 100755 (executable)
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+++ b/tos/chips/m16c62p/timer/M16c62pCounter32C.nc
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+/*
+ * Copyright (c) 2009 Communication Group and Eislab at
+ * Lulea University of Technology
+ *
+ * Contact: Laurynas Riliskis, LTU
+ * Mail: laurynas.riliskis@ltu.se
+ * All rights reserved.
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the
+ *   distribution.
+ * - Neither the name of Communication Group at Lulea University of Technology
+ *   nor the names of its contributors may be used to endorse or promote
+ *    products derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL STANFORD
+ * UNIVERSITY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Build a TEP102 32 bit Counter from two M16c/62p hardware timers.
+ *
+ * @author Henrik Makitaavola <henrik.makitaavola@gmail.com>
+ */
+
+generic module M16c62pCounter32C(typedef precision_tag)
+{
+  provides interface Counter<precision_tag, uint32_t> as Counter;
+  uses interface HplM16c62pTimer as TimerLow;
+  uses interface HplM16c62pTimer as TimerHigh;
+}
+implementation
+{
+  async command uint32_t Counter.get()
+  {
+    uint32_t time = 0;
+    atomic
+    {
+      time = (((uint32_t)call TimerHigh.get()) << 16) + call TimerLow.get();
+    }
+    // The timers count down so the time needs to be inverted.
+    return (0xFFFFFFFF) - time;
+  }
+
+  async command bool Counter.isOverflowPending()
+  {
+    return call TimerHigh.testInterrupt();
+  }
+
+  async command void Counter.clearOverflow()
+  {
+    call TimerHigh.clearInterrupt();
+  }
+
+  async event void TimerHigh.fired()
+  {
+    signal Counter.overflow();
+  }
+
+  async event void TimerLow.fired() {}
+}
+