00001 /* 00002 * Copyright (C) 2001-2007 by egnite Software GmbH. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 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 copyright holders nor the names of 00014 * contributors may be used to endorse or promote products derived 00015 * from this software without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS 00018 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00019 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 00020 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE 00021 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 00022 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 00023 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 00024 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 00025 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00026 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 00027 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * For additional information see http://www.ethernut.de/ 00031 * 00032 */ 00033 /* 00034 * $Log: time.c,v $ 00035 * Revision 1.5 2007/06/03 08:49:56 haraldkipp 00036 * Bug #1724015 fixed. Simplified code in time(). 00037 * 00038 * Revision 1.4 2006/10/05 17:20:13 haraldkipp 00039 * Standard C functions now support hardware RTC. 00040 * Ugly type conversion replaced. 00041 * 00042 * Revision 1.3 2003/12/19 22:26:38 drsung 00043 * Dox written. 00044 * 00045 * Revision 1.2 2003/11/26 11:14:32 haraldkipp 00046 * Portability issues 00047 * 00048 * Revision 1.1 2003/11/24 18:07:37 drsung 00049 * first release 00050 * 00051 * 00052 */ 00053 00054 #include <time.h> 00055 #include <sys/timer.h> 00056 #include <sys/atom.h> 00057 #include <stdlib.h> 00058 00059 #include <dev/rtc.h> 00060 00061 static u_long epo_offs; 00062 00068 00080 time_t time(time_t * timer) 00081 { 00082 struct _tm *tm; 00083 /* Initially use internal seconds counter. */ 00084 time_t r = epo_offs + NutGetSeconds(); 00085 00086 /* Try to get time from hardware clock. */ 00087 if ((tm = malloc(sizeof(struct _tm))) != NULL) { 00088 tm->tm_isdst = -1; 00089 if (NutRtcGetTime(tm) == 0) { 00090 /* Success. */ 00091 r = _mkgmtime(tm); 00092 } 00093 free(tm); 00094 } 00095 00096 /* Return result. */ 00097 if (timer) { 00098 *timer = r; 00099 } 00100 return r; 00101 } 00102 00110 int stime(time_t * timer) 00111 { 00112 /* Try to set hardware clock. */ 00113 NutRtcSetTime(gmtime(timer)); 00114 /* Set internal seconds counter. */ 00115 epo_offs = (u_long)(*timer) - NutGetSeconds(); 00116 00117 return 0; 00118 } 00119