Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / tos / chips / cc2420 / security / CC2420KeysP.nc

diff --git a/tos/chips/cc2420/security/CC2420KeysP.nc b/tos/chips/cc2420/security/CC2420KeysP.nc
new file mode 100644 (file)
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+++ b/tos/chips/cc2420/security/CC2420KeysP.nc
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+/*
+* Copyright (c) 2008 Johns Hopkins University.
+* 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 (updated) modification history and the author appear in
+* all copies of this source code.
+*
+* 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 THE COPYRIGHT HOLDERS OR  CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, LOSS OF USE,  DATA,
+* OR PROFITS) 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.
+*/
+
+/**
+ * @author JeongGil Ko
+ * @author Razvan Musaloiu-E.
+ * @author Jong Hyun Lim
+ */
+
+module CC2420KeysP
+{
+  provides interface CC2420Keys;
+
+  uses {
+    interface GeneralIO as CSN;
+    interface CC2420Ram as KEY0;
+    interface CC2420Ram as KEY1;
+    interface Resource;
+  }
+}
+
+implementation
+{
+  uint8_t *currentKey = NULL;
+  bool currentKeyNo;
+
+  task void resourceReq()
+  {
+    error_t error;
+    error = call Resource.immediateRequest();
+    if(error != SUCCESS){
+      post resourceReq();
+    }
+  }
+
+  command error_t CC2420Keys.setKey(uint8_t keyNo, uint8_t* key)
+  {
+    if (currentKey != NULL || keyNo > 1) {
+      return FAIL;
+    }
+    currentKey = key;
+    currentKeyNo = keyNo;
+
+    if(call Resource.request() != SUCCESS){
+      post resourceReq();
+    }
+
+    return SUCCESS;
+  }
+
+  event void Resource.granted()
+  {
+    if (currentKeyNo) {
+      call CSN.clr();
+      call KEY1.write(0, currentKey, 16);
+      call CSN.set();
+    } else {
+      call CSN.clr();
+      call KEY0.write(0, currentKey, 16);
+      call CSN.set();
+    }
+    call Resource.release();
+    currentKey = NULL;
+    signal CC2420Keys.setKeyDone(currentKeyNo, currentKey);
+  }
+}