ds1307.c

EBD9200开发板DS1307测试例程

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>

#define DS1307_RAM_ADDR_START	0x08
#define DS1307_RAM_ADDR_END	0x3F
#define DS1307_RAM_SIZE 0x40

#define	WRITE_COM		1
#define	READ_COM		2

#define BCD_TO_BIN(val) (((val)&0x0F) + ((val)>>4)*10)
#define BIN_TO_BCD(val) ((((val)/10)<<4) + (val)%10)

#define TWELVE_HOUR_MODE(n)	(((n)>>6)&1)
#define HOURS_AP(n)		(((n)>>5)&1)
#define HOURS_12(n)		BCD_TO_BIN((n)&0x1F)
#define HOURS_24(n)		BCD_TO_BIN((n)&0x3F)

static char *ds1307_mon2str( unsigned int mon)
{
	char *mon2str[12] = {
	  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
	  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	};
	if( mon > 11) return "error";
	else return mon2str[ mon];
}

static char *ds1307_week2str( unsigned int week)
{
	char *week2str[7] = {
	  "Monday", "Tuesday", "Wednesday", "Tursday", "Friday", "Saturday","Sunday"
	};
	if( week > 6) return "error";
	else return week2str[ week];
}

struct time_Des
{
	char second;
	char minute;
	char hour;
	char week;
	char date;
	char month;
	char year;
};

static struct time_Des ds1307time;

/* Physical interface */
struct ds1307_local
{
	char addr;			/* SPI chip-select number */
	char* pTime;		/* number of bytes per page */
	int len;
};
static	struct ds1307_local ds1307Frame;

int main(void) {
   int file;
   char val;
   int year,month,date,week,hour,minute,second;
   if ((file = open("/dev/i2c/0",O_RDWR)) < 0) {
	printf("open /dev/i2c/0 is failed\n");
     	exit(1);
   }
   printf("Start test DS1307");
   printf("\n\rDo you want to Reset Time(Y/N)");

   scanf("%c",&val);
if(val=='Y'||val=='y')
{
	printf("\n\ryear(00-99):");
	scanf("%d",&year);

	printf("month(1-12):");
	scanf("%d",&month);

	printf("date(1-31):");
	scanf("%d",&date);

	printf("week(1-7):");
	scanf("%d",&week);

	printf("hour(0-23):");
	scanf("%d",&hour);

	printf("minute(0-59):");
	scanf("%d",&minute);

	printf("second(0-59):");
	scanf("%d",&second);
	//set time

 	printf("\nYour input string is =%d %d %d %d %d %d %d\n\r\n\r",year,month,date,week,hour,minute,second);
	//set time
/*
	ds1307time.year		=year;
	ds1307time.month	=month;
	ds1307time.date		=date;
	ds1307time.week		=week;
	ds1307time.hour		=hour;
	ds1307time.minute	=minute;
	ds1307time.second	=second;
*/
	ds1307time.year		=BIN_TO_BCD(year);
	ds1307time.month	=BIN_TO_BCD(month);
	ds1307time.date		=BIN_TO_BCD(date);
	ds1307time.week		=BIN_TO_BCD(week);
	ds1307time.hour		=BIN_TO_BCD(hour);
	ds1307time.minute	=BIN_TO_BCD(minute);
	ds1307time.second	=BIN_TO_BCD(second);
	
	ds1307Frame.len = 7;
	ds1307Frame.addr = 0x00;
	ds1307Frame.pTime = (char*)&ds1307time;
	ioctl(file, WRITE_COM, &ds1307Frame);
}
	ds1307Frame.pTime = (char*)&ds1307time;
   while (1)	// Set sequential part here
	{
	ds1307Frame.len = 7;
	ds1307Frame.addr = 0x00;
//	ds1307Frame.pTime = (char*)&ds1307time;
	ioctl(file, READ_COM, &ds1307Frame);

	sleep(1);

printf("Now is =    ' %d-%s-200%d  %2d:%2d:%2d   %s '\n",\
				BCD_TO_BIN(ds1307time.date),\
				ds1307_mon2str(BCD_TO_BIN(ds1307time.month)-1),\
				BCD_TO_BIN(ds1307time.year),\
				BCD_TO_BIN(ds1307time.hour),\
				BCD_TO_BIN(ds1307time.minute),\
				BCD_TO_BIN(ds1307time.second),\
				ds1307_week2str(BCD_TO_BIN(ds1307time.week)-1));
	}
   close(file);
	exit(0);	
}