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 * Author: Oliver Schmidt <ol.sc@web.de> 00032 * 00033 * $Id: clock.c,v 1.3 2008/07/12 14:46:03 oliverschmidt Exp $ 00034 */ 00035 00036 #include <apple2.h> 00037 00038 #include "contiki.h" 00039 #include "sys/log.h" 00040 00041 /* The enhanced Apple//e doesn't have a hardware clock whatsoever. Therefore the 00042 * cc65 C-library for this target doesn't include an implementation of clock(). 00043 */ 00044 00045 static unsigned char tick = 14; 00046 static clock_time_t time; 00047 00048 /*-----------------------------------------------------------------------------------*/ 00049 void 00050 clock_init(void) 00051 { 00052 if(get_ostype() >= APPLE_IIGS) { 00053 if(*(signed char *)0xC036 < 0) { 00054 /* 5 / 14 = 1.0MHz / 2.8MHz */ 00055 tick = 5; 00056 log_message("Assuming 2.8 MHz ...", ""); 00057 } 00058 } 00059 } 00060 /*-----------------------------------------------------------------------------------*/ 00061 void 00062 clock_update(void) 00063 { 00064 static unsigned int count; 00065 00066 count += tick; 00067 if(count > 2000) { 00068 count = 0; 00069 ++time; 00070 } 00071 } 00072 /*-----------------------------------------------------------------------------------*/ 00073 clock_time_t 00074 clock_time(void) 00075 { 00076 return time; 00077 } 00078 /*-----------------------------------------------------------------------------------*/ 00079 unsigned long 00080 clock_seconds(void) 00081 { 00082 return time / CLOCK_CONF_SECOND; 00083 } 00084 /*-----------------------------------------------------------------------------------*/