rtc.c File Reference

#include <core/rtc.h>
#include <string.h>

Include dependency graph for rtc.c:

Go to the source code of this file.

Functions
void	get_time (int *hours, int *minutes, int *seconds)
	get_time this function will retrieve the system time and place it in three pointers More...
void	set_time (int hours, int minutes, int seconds)
	set_time sets the RTC time More...
void	get_date (int *day, int *month, int *year)
	get_date this function will retrieve the system date and place in three pointers More...
void	set_date (int day, int month, int year)
	set_date sets the RTC Date More...

Function Documentation

void get_date	(	int *	day,
		int *	month,
		int *	year
	)

get_date this function will retrieve the system date and place in three pointers

Parameters

day	pointer to int where the current day will be stored, UTC Time zone
months	pointer to int where the current month will be stored, UTC Time zone
year	pointer to int where the current year will be stored, UTC Time zone

Definition at line 56 of file rtc.c.

References DAY_OF_MONTH_INDEX, inb, MONTHS_INDEX, outb, RTC_INDEX_REG, and YEAR_INDEX.

Referenced by getDate().

{
    char temp = 0;
    outb(RTC_INDEX_REG, DAY_OF_MONTH_INDEX);
    temp = inb(0x71);
    *day = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);

    outb(RTC_INDEX_REG, MONTHS_INDEX);
    temp = inb(0x71);
    *month = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);

    outb(RTC_INDEX_REG, YEAR_INDEX);
    temp = inb(0x71);
    *year = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);
}

void get_time	(	int *	hours,
		int *	minutes,
		int *	seconds
	)

get_time this function will retrieve the system time and place it in three pointers

get_time this function will retrieve the system time and place it in three pointers. Military time

Parameters

hours	pointer to int where the current hours will be stored, in UTC timezone
minutes	pointer to int where the current minutes will be stored, in UTC timezone
seconds	pointer to int where the current seconds will be stored, in UTC timezone

Definition at line 10 of file rtc.c.

References HOURS_INDEX, inb, MINUTES_INDEX, outb, RTC_INDEX_REG, and SECONDS_INDEX.

Referenced by getTime().

{
    char temp = 0;
    outb(RTC_INDEX_REG, SECONDS_INDEX);
    temp = inb(0x71);
    *seconds = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);

    outb(RTC_INDEX_REG, MINUTES_INDEX);
    temp = inb(0x71);
    *minutes = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);

    outb(RTC_INDEX_REG, HOURS_INDEX);
    temp = inb(0x71);
    *hours = ((temp & 0xf0) >>4 ) *10 + (temp & 0x0f);
}

void set_date	(	int	day,
		int	month,
		int	year
	)

set_date sets the RTC Date

Parameters

day	the day to set the clock to, must be valid for the month. UTC Time zone
month	the month to set the clock to, must be between 1 and 12. UTC Time zone
year	the year to set the clock to, must be less than 100. UTC Time zone

Definition at line 79 of file rtc.c.

References cli, DAY_OF_MONTH_INDEX, MONTHS_INDEX, outb, RTC_DATA_REG, RTC_INDEX_REG, sti, and YEAR_INDEX.

Referenced by setDate().

{
    sti();

    outb(RTC_INDEX_REG, DAY_OF_MONTH_INDEX);
    outb(RTC_DATA_REG, ((day/10)<<4)|(day%10));

    outb(RTC_INDEX_REG, MONTHS_INDEX);
    outb(RTC_DATA_REG, ((month/10)<<4)|(month%10));

    outb(RTC_INDEX_REG, YEAR_INDEX);
    outb(RTC_DATA_REG, (((year-(year/100)*100)/10)<<4)|(year%10) );

    cli();
}

void set_time	(	int	hours,
		int	minutes,
		int	seconds
	)

set_time sets the RTC time

set_time sets the RTC time. Military time

Parameters

hours	the hours to set the clock to, must be less than 24. In UTC Time zone
minutes	the minutes to set the clock to, must be less than 60. In UTC Time zone
seconds	the seconds to set the clock to, must be less than 60. In UTC Time zone

Definition at line 33 of file rtc.c.

References cli, HOURS_INDEX, MINUTES_INDEX, outb, RTC_DATA_REG, RTC_INDEX_REG, SECONDS_INDEX, and sti.

Referenced by setTime().

{
    sti();

    outb(RTC_INDEX_REG, HOURS_INDEX);
    outb(RTC_DATA_REG, ((hours/10)<<4)|(hours%10) );

    outb(RTC_INDEX_REG, MINUTES_INDEX);
    outb(RTC_DATA_REG, ((minutes/10)<<4)|(minutes%10) );

    outb(RTC_INDEX_REG, SECONDS_INDEX);
    outb(RTC_DATA_REG, ((seconds/10)<<4)|(seconds%10) );

    cli();
}