43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/*****************************************
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* VulcanOS Kernel *
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* Developed by Marco 'icebit' Cetica *
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* (c) 2019-2021 *
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* Released under GPLv3 *
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* https://github.com/ice-bit/vulcanos *
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*****************************************/
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/* Get time reading the RTC(real time clock) CMOS on the motherboard */
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#ifndef TIME_H
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#define TIME_H
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#include <stdint.h>
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// Define RTC field registers
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#define TIME_R_YEAR 0x09
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#define TIME_R_MONTH 0x08
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#define TIME_R_DAY 0x07
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#define TIME_R_HOUR 0x06
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#define TIME_R_MINUTE 0x05
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#define TIME_R_SECOND 0x04
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//#define TIME_R_CENTURY 0x32
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// Define RTC address
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#define CMOS_ADDRESS 0x70
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#define CMOS_DATA 0x71
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// Convert BCD encoed values to binary
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#define BCD_CONVERTER(n) ((n / 16) * 10 + (n & 0xF))
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typedef struct {
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uint8_t second;
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uint8_t minute;
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uint8_t hour;
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uint8_t day;
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uint8_t month;
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uint8_t year;
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} time_t;
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time_t cmos_reader();
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uint32_t get_time(uint32_t field);
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#endif
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