doxygen-docs/rtc_8h_source.html

#ifndef RTC_H

#define RTC_H


#include <basics.h>

#include <graphics.h>


// I/O ports for RTC

#define RTC_PORT 0x70

#define RTC_DATA 0x71


// RTC Registers

#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  // Optional, not all BIOSes use it


int8 bcd_to_bin(int8 val);


int8 read_rtc_register(int8 reg);


void wait_rtc_update();


int8 rtc_read_stable(int8 reg);


void init_rtc();


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


void display_time();


void sleep(int seconds);


#endif

basics.h
This is a basic header files with FrostWing specific short forms and basically a good for life header...

graphics.h
Contains all the print functions.

rtc_read_stable
int8 rtc_read_stable(int8 reg)
Reads from a register without tick glitch (more stable).

display_time
void display_time()
Displays time in an neat format.

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.

bcd_to_bin
int8 bcd_to_bin(int8 val)
Converts BDC to binary.

wait_rtc_update
void wait_rtc_update()
Wait till RTC is responding.

sleep
void sleep(int seconds)
Pauses the OS for set seconds. Use PIT for accuracy.

init_rtc
void init_rtc()
Initializes the main RTC for use.

read_rtc_register
int8 read_rtc_register(int8 reg)
Reads the value from an RTC register.