Contiki 2.6

rtimer-arch.h

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00001 /*
00002  * Copyright (c) 2007, Swedish Institute of Computer Science.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Contiki operating system.
00030  *
00031  * $Id: rtimer-arch.h,v 1.1 2009/09/08 20:07:35 zdshelby Exp $
00032  */
00033 
00034 /**
00035  * \file
00036  *         Hardware-dependent function declarations used to
00037  *         support the contiki rtimer module.
00038  *
00039  *         We use Timer 1 on the cc2431.
00040  *
00041  * \author
00042  *         Zach Shelby (Original)
00043  *         George Oikonomou - <oikonomou@users.sourceforge.net>
00044  *           (rtimer-arch implementation for cc2430)
00045  */
00046 
00047 #ifndef __RTIMER_ARCH_H__
00048 #define __RTIMER_ARCH_H__
00049 
00050 #include "contiki-conf.h"
00051 #include "cc2430_sfr.h"
00052 
00053 /*
00054  * 32 MHz clock, prescaled down to 500 kHz for all 4 timers in clock_init().
00055  * Further prescaled factor 32 for T1, thus T1 is 15625 Hz
00056  */
00057 #define RTIMER_ARCH_SECOND (15625U)
00058 
00059 #define rtimer_arch_now() ((rtimer_clock_t)(T1CNTL + (T1CNTH << 8)))
00060 
00061 void cc2430_timer_1_ISR(void) __interrupt (T1_VECTOR);
00062 
00063 #endif /* __RTIMER_ARCH_H__ */