test_rct.c

标准linux 2.4.20 针对ds1302 的RTC 源码,具有充电功能!

#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/utsname.h>
#include <ctype.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include "ds1302.h"

//#include <asm/arch/major.h>


#define DEVICE_DS1302 "/dev/ds1302"


static time_t read_rtc()
{
	int rtc;
	int currenty;
	struct rtc_time tm;
	char *oldtz = 0;
	time_t t = 0;

	if (( rtc = open ( "/dev/ds1302", O_RDONLY )) < 0 ) {
	//if (( rtc = open ( "/dev/rtc", O_RDONLY )) < 0 ) {
		if (( rtc = open ( "/dev/misc/rtc", O_RDONLY )) < 0 )
			printf ( "Could not access RTC" );
	}
	memset ( &tm, 0, sizeof( struct tm ));
	if ( ioctl ( rtc, RTC_RD_TIME, &tm ) < 0 )
		//bb_perror_msg_and_die ( "Could not read time from RTC" );
		{
		printf ( "Could not read time from RTC" );
		return -1;
		}
	else
	{
		//printf("\n");
		/*printf(" sec is %d \n",tm.tm_sec);
		printf(" min is %d \n",tm.tm_min);
		printf(" hour is %d \n",tm.tm_hour);
		printf(" mday is %d \n",tm.tm_mday);
		printf(" mon is %d \n",tm.tm_mon);
		printf(" year is %d \n",tm.tm_year);*/
		if(tm.tm_year>100)
		{
			tm.tm_year-=100;
			currenty=2000;
		}
		else 
		currenty=1900;
		printf(" current date & time is :\n");
		printf(" %d年%d月%d日 星期%d %02d:%02d:%02d \n",tm.tm_year+currenty,tm.tm_mon,tm.tm_mday,tm.tm_wday,tm.tm_hour,tm.tm_min,tm.tm_sec);
		printf("\n");
		}
		t = mktime ( &tm );
		return t;
	//tm. tm_isdst = -1; // not known

	close ( rtc );
/*
	if ( utc ) {
		oldtz = getenv ( "TZ" );
		setenv ( "TZ", "UTC 0", 1 );
		tzset ( );
	}

	t = mktime ( &tm );

	if ( utc ) {
		if ( oldtz )
			setenv ( "TZ", oldtz, 1 );
		else
			unsetenv ( "TZ" );
		tzset ( );
	}
	*/
	//return 0;
}


static void write_rtc(struct rtc_time tm)
{
	int rtc;
	//struct tm tm;

	if (( rtc = open ( "/dev/ds1302", O_WRONLY )) < 0 ) {
		if (( rtc = open ( "/dev/misc/rtc", O_WRONLY )) < 0 )
			printf ( "Could not access RTC" );
	}

  
  //printf(" seting the time.....\n");
	if ( ioctl ( rtc, RTC_SET_TIME, &tm ) < 0 )
		printf ( "Could not set the RTC time" );
  //printf(" set the time completely....\n");
	close ( rtc );
}

int main()
{
	int fd; 
	int val=-1;
	int ret = 0;
	struct rtc_time tm;
	struct timeval tv = { 0, 0 };
	//const struct timezone tz = { timezone/60 - 60*daylight, 0 };

	tm.tm_sec=00;
	tm.tm_min=11;
	tm.tm_hour=16;
	tm.tm_mday=29;
	tm.tm_mon=11;
	tm.tm_year=107;
	tm.tm_wday=4;

  write_rtc(tm);
  /*
  while(1)
  {
  	read_rtc();
  	sleep(1);
  	sleep(1);
  	}
  	*/
  //tv. tv_sec = read_rtc ();	
  //if(gettimeofday(&tv,NULL));
  	//printf("gettimeofday err...,\n");
  if ( settimeofday ( &tv, NULL ))
  	printf(" settimeofday err...\n");
	return 0;
}