rtc.h File Reference

The Real Time Clock (RTC) code header. More...

#include <basics.h>
#include <graphics.h>

Include dependency graph for rtc.h:

Go to the source code of this file.

Macros
#define	RTC_PORT   0x70
#define	RTC_DATA   0x71
#define	RTC_SECONDS   0x00
#define	RTC_MINUTES   0x02
#define	RTC_HOURS   0x04
#define	RTC_DAY   0x07
#define	RTC_MONTH   0x08
#define	RTC_YEAR   0x09
#define	RTC_CENTURY   0x32

Functions
int8	bcd_to_bin (int8 val)
	Converts BDC to binary.
int8	read_rtc_register (int8 reg)
	Reads the value from an RTC register.
void	wait_rtc_update ()
	Wait till RTC is responding.
int8	rtc_read_stable (int8 reg)
	Reads from a register without tick glitch (more stable).
void	init_rtc ()
	Initializes the main RTC for use.
void	update_system_time (int8 *second, int8 *minute, int8 *hour, int8 *day, int8 *month, int16 *year)
	Updated the given variable with system time.
void	display_time ()
	Displays time in an neat format.
void	sleep (int seconds)
	Pauses the OS for set seconds. Use PIT for accuracy.

Detailed Description

The Real Time Clock (RTC) code header.

Author

Pradosh (prado.nosp@m.shga.nosp@m.me@gm.nosp@m.ail..nosp@m.com)

Version

0.1

Date

2025-10-11

Copyright

Copyright (c) Pradosh 2025

Definition in file rtc.h.

Macro Definition Documentation

RTC_CENTURY

#define RTC_CENTURY   0x32

Definition at line 29 of file rtc.h.

RTC_DATA

#define RTC_DATA   0x71

Definition at line 20 of file rtc.h.

RTC_DAY

#define RTC_DAY   0x07

Definition at line 26 of file rtc.h.

RTC_HOURS

#define RTC_HOURS   0x04

Definition at line 25 of file rtc.h.

RTC_MINUTES

#define RTC_MINUTES   0x02

Definition at line 24 of file rtc.h.

RTC_MONTH

#define RTC_MONTH   0x08

Definition at line 27 of file rtc.h.

RTC_PORT

#define RTC_PORT   0x70

Definition at line 19 of file rtc.h.

RTC_SECONDS

#define RTC_SECONDS   0x00

Definition at line 23 of file rtc.h.

RTC_YEAR

#define RTC_YEAR   0x09

Definition at line 28 of file rtc.h.

Function Documentation

bcd_to_bin()

int8 bcd_to_bin

(

int8

val

)

Converts BDC to binary.

Parameters

val	The BCD value.

Returns

int8

read_rtc_register()

int8 read_rtc_register

(

int8

reg

)

Reads the value from an RTC register.

Parameters

reg	The register number

Returns

int8 Value of the Register

rtc_read_stable()

int8 rtc_read_stable

(

int8

reg

)

Reads from a register without tick glitch (more stable).

Parameters

reg

Returns

int8

sleep()

void sleep

(

int

seconds

)

Pauses the OS for set seconds. Use PIT for accuracy.

Parameters

seconds

update_system_time()

void update_system_time	(	int8 *	second,
		int8 *	minute,
		int8 *	hour,
		int8 *	day,
		int8 *	month,
		int16 *	year )

Updated the given variable with system time.

Parameters

second
minute
hour
day
month
year