Contiki 2.6
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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.c,v 1.17 2010/11/27 15:27:20 nifi Exp $ 00032 */ 00033 00034 /** 00035 * \file 00036 * MSP430-specific rtimer code 00037 * \author 00038 * Adam Dunkels <adam@sics.se> 00039 */ 00040 00041 #include "contiki.h" 00042 #include "sys/energest.h" 00043 #include "sys/rtimer.h" 00044 #include "sys/process.h" 00045 #include "dev/watchdog.h" 00046 #include "isr_compat.h" 00047 00048 #define DEBUG 0 00049 #if DEBUG 00050 #include <stdio.h> 00051 #define PRINTF(...) printf(__VA_ARGS__) 00052 #else 00053 #define PRINTF(...) 00054 #endif 00055 00056 /*---------------------------------------------------------------------------*/ 00057 ISR(TIMER1_A0, timera0) 00058 { 00059 ENERGEST_ON(ENERGEST_TYPE_IRQ); 00060 00061 watchdog_start(); 00062 00063 rtimer_run_next(); 00064 00065 if(process_nevents() > 0) { 00066 LPM4_EXIT; 00067 } 00068 00069 watchdog_stop(); 00070 00071 ENERGEST_OFF(ENERGEST_TYPE_IRQ); 00072 } 00073 /*---------------------------------------------------------------------------*/ 00074 void 00075 rtimer_arch_init(void) 00076 { 00077 dint(); 00078 00079 /* CCR0 interrupt enabled, interrupt occurs when timer equals CCR0. */ 00080 TA1CCTL0 = CCIE; 00081 00082 /* Enable interrupts. */ 00083 eint(); 00084 } 00085 /*---------------------------------------------------------------------------*/ 00086 rtimer_clock_t 00087 rtimer_arch_now(void) 00088 { 00089 rtimer_clock_t t1, t2; 00090 do { 00091 t1 = TA1R; 00092 t2 = TA1R; 00093 } while(t1 != t2); 00094 return t1; 00095 } 00096 /*---------------------------------------------------------------------------*/ 00097 void 00098 rtimer_arch_schedule(rtimer_clock_t t) 00099 { 00100 PRINTF("rtimer_arch_schedule time %u\n", t); 00101 00102 TA1CCR0 = t; 00103 } 00104 /*---------------------------------------------------------------------------*/