doxygen-docs/rtc_8h_source.html

#ifndef RTC_H

#define RTC_H


#include <basics.h>

#include <graphics.h>

#include <hal.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


uint8 bcd_to_bin(uint8 val);


uint8 read_rtc_register(uint8 reg);


void wait_rtc_update(void);


uint8 rtc_read_stable(uint8 reg);


void init_rtc(void);


void update_system_time(uint8 *second, uint8 *minute, uint8 *hour, uint8 *day, uint8 *month, uint16 *year);


void display_time(void);


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.

hal.h
Header file for Hardware Abstraction Layer -> Source from GoGX OS.

read_rtc_register
uint8 read_rtc_register(uint8 reg)
Reads the value from an RTC register.

bcd_to_bin
uint8 bcd_to_bin(uint8 val)
Converts BDC to binary.

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

wait_rtc_update
void wait_rtc_update(void)
Wait till RTC is responding.

update_system_time
void update_system_time(uint8 *second, uint8 *minute, uint8 *hour, uint8 *day, uint8 *month, uint16 *year)
Updated the given variable with system time.

rtc_read_stable
uint8 rtc_read_stable(uint8 reg)
Reads from a register without tick glitch (more stable).

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

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