-/* tab:4
- * "Copyright (c) 2005 Stanford 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 following two paragraphs and the author appear in all
- * copies of this software.
- *
- * IN NO EVENT SHALL STANFORD UNIVERSITY 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 STANFORD UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * STANFORD UNIVERSITY 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 STANFORD UNIVERSITY
- * HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
- * ENHANCEMENTS, OR MODIFICATIONS."
- *
- * "Copyright (c) 2000-2003 The Regents of the University of California.
+/*
+ * Copyright (c) 2005-2006 Rincon Research Corporation
* 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."
+ * 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 the Rincon Research Corporation nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
*
- * Copyright (c) 2002-2003 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.
+ * 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
+ * ARCHED ROCK 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
*/
/**
*
* @author Philip Levis
* @author Matt Miller
+ * @author David Moss
* @version @version $Revision$ $Date$
*/
-#include "Timer.h"
-
module HplCC2420InterruptsP {
provides {
interface GpioInterrupt as CCA;
}
+
uses {
interface GeneralIO as CC_CCA;
- interface Timer<TMilli> as CCATimer;
}
}
implementation {
+
norace uint8_t ccaWaitForState;
+
norace uint8_t ccaLastState;
- bool ccaTimerDisabled = FALSE;
- // Add stdcontrol.init/.start to setup TimerCapture timebase
+
+ bool ccaCheckDisabled = FALSE;
// ************* CCA Interrupt handlers and dispatch *************
/**
* enable an edge interrupt on the CCA pin
- NOT an interrupt in MICAz. Implement as a timer polled pin monitor
+ * NOT an interrupt in MICAz. Implement as a task polled pin monitor
*/
task void CCATask() {
+ uint8_t CCAState;
atomic {
- if (!ccaTimerDisabled)
- call CCATimer.startOneShot(1);
+ if (ccaCheckDisabled) {
+ return;
+ }
+ }
+
+ //check CCA state
+ CCAState = call CC_CCA.get(); //get current state here if waiting for edge
+ if ((ccaLastState != ccaWaitForState) && (CCAState == ccaWaitForState)) {
+ signal CCA.fired();
}
+
+ //if CCA Pin is correct and edge found
+ //repost task and try again
+ ccaLastState = CCAState;
+ post CCATask();
}
async command error_t CCA.enableRisingEdge() {
atomic ccaWaitForState = TRUE; //save the state we are waiting for
- atomic ccaTimerDisabled = FALSE;
+ atomic ccaCheckDisabled = FALSE;
ccaLastState = call CC_CCA.get(); //get current state
post CCATask();
return SUCCESS;
async command error_t CCA.enableFallingEdge() {
atomic ccaWaitForState = FALSE; //save the state we are waiting for
- atomic ccaTimerDisabled = FALSE;
+ atomic ccaCheckDisabled = FALSE;
ccaLastState = call CC_CCA.get(); //get current state
post CCATask();
return SUCCESS;
}
-
- /**
- * disables CCA interrupts
- */
- void task stopTask() {
- atomic{
- if (ccaTimerDisabled) {
- call CCATimer.stop();
- }
- }
- }
+
async command error_t CCA.disable() {
- atomic ccaTimerDisabled = TRUE;
- post stopTask();
+ atomic ccaCheckDisabled = TRUE;
return SUCCESS;
}
- /**
- * TImer Event fired so now check for CCA level
- */
- event void CCATimer.fired() {
- uint8_t CCAState;
- atomic {
- if (ccaTimerDisabled) {
- return;
- }
- }
- //check CCA state
- CCAState = call CC_CCA.get(); //get current state
- //here if waiting for an edge
- if ((ccaLastState != ccaWaitForState) && (CCAState == ccaWaitForState)) {
- signal CCA.fired();
- }//if CCA Pin is correct and edge found
- //restart timer and try again
- ccaLastState = CCAState;
- post CCATask();
- return;
- }//CCATimer.fired
- default async event void CCA.fired() {}
+ /***************** Defaults ****************/
+ default async event void CCA.fired() {
+ }
+
+}
-} //Module HPLCC2420InterruptM
-
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